Identification Information
Citation:
Originator:
Department of Geology; Andrew Gavin, formerly at The College of Wooster, Department of Geology; Karyn Powers, formerly at The College of Wooster, Department of Geology.
Publication Date: 2007
Title: Open-File Report O-07-17: Preliminary
Geologic Map of the
Publication Information:
Publication
Place:
Publisher: Oregon Department of Geology and Mineral Industries
Description:
Abstract: This data set contains the information used
to create the Preliminary Geologic Map of the
Report O-07-17. This map is one of
a series of geologic maps created for quadrangles in south-central
The various layers (geologic units, samples, etc.) of the map were digitized in MapInfo Professional v.7.0 from drawings on paper quadrangles, UTM coordinates, or maps from student research reports. The exception is the earthquakes layers, whose point locations were determined based on latitude and longitude data from the Pacific Northwest Seismic Network (2003). Rock samples were collected and analyzed by x-ray fluorescence (XRF) intermittently between 1991 and 2005. Several samples were also dated using K-Ar or 40Ar/39Ar dating methods. The major and trace elemental chemistry data and ages are made available in the samples table of this data set.
Purpose: These data were collected and compiled in order to better understand the local geology and geologic history, to create a field-
mappable
geologic map of the U.S. Geological Survey 7.5’ Aspen Lake quadrangle to be
published as Open-File Report O-07-17, and to make available the collected
chemical and age information that may be useful in various forms of study of
this volcanic region. The map is intended for a diverse audience with varying
amounts of geologic understanding. This is one of a series of geologic maps of
USGS 7.5’ quadrangles in the south-central region of
Supplemental Information: There are several different files and file formats in this data set. The geologic units table, unit boundaries/contacts table,
samples table, faults table,
volcanic centers table, and
There is a MapInfo workspace
(.WOR) file that opens the georeferenced
Time Period of Content:
Multiple Dates/Times:
Calendar Date: 1991, 1992, 1994, 1995, 1998, 1999, 2005, 2007
Currentness Reference: ground condition except 2007 is publication date
Status:
Progress: Complete
Maintenance and Update Frequency: Unknown
Spatial Domain:
Bounding Coordinates:
West Bounding Coordinate: -122.125
East Bounding Coordinate: -122.00
North Bounding Coordinate: 42.375
South Bounding Coordinate: 42.25
Keywords:
Theme:
Theme Keyword Thesaurus: none
Theme Keyword: geologic map
Theme Keyword: map of surface geology
Theme Keyword: surface geology
Theme Keyword: volcanoes
Theme
Keyword:
Theme Keyword: volcanic flows
Theme Keyword: lava flows
Theme Keyword: units
Theme Keyword: formations
Theme Keyword: formation boundary
Theme Keyword: contact
Theme Keyword: samples
Theme Keyword: rock samples
Theme Keyword: geochemistry
Theme Keyword: chemistry
Theme Keyword: age-dated
Theme Keyword: volcanic center
Theme Keyword: fault
Theme Keyword: geospatial vector format
Theme Keyword: digital raster graphic
Theme Keyword: drg
Theme Keyword: topographic map
Theme Keyword: topographic quadrangle
Theme Keyword: USGS quadrangle
Theme Keyword: Open-File Report
Theme Keyword: Open-File Report 07-17
Theme
Keyword:
Theme
Keyword:
Theme
Keyword: 1993
Place:
Place Keyword Thesaurus: none
Place
Keyword:
Place
Keyword: south-central
Place
Keyword:
Place
Keyword:
Place
Keyword:
Place
Keyword:
Place
Keyword: Aspen
Place
Keyword:
Place
Keyword:
Place
Keyword: West of
Place
Keyword:
Place
Keyword:
Place
Keyword:
Place
Keyword:
Place Keyword: Mountain Lakes Loop Trail
Place
Keyword:
Place Keyword: Clover Creek
Place Keyword: Varney Creek
Place Keyword: Moss Creek
Place
Keyword: Little Aspen
Place
Keyword: Aspen
Place
Keyword:
Place
Keyword:
Place
Keyword:
Place
Keyword:
Place Keyword: Cascades
Place
Keyword:
Place Keyword: High Cascade volcanoes
Place
Keyword:
Stratum:
Stratum Keyword Thesaurus: none
Stratum Keyword: surface
Stratum Keyword: surface geology
Stratum Keyword: surficial
Stratum Keyword: surficial formations
Stratum Keyword: surface formations
Stratum Keyword: upper strata
Stratum Keyword: surface strata
Stratum Keyword: volcanic strata
Stratum Keyword: volcanic
Stratum Keyword: surficial volcanic deposits
Stratum Keyword: lava flows
Stratum Keyword: surficial lava flow
Stratum Keyword: Quaternary sediments
Temporal:
Temporal Keyword Thesaurus: none
Temporal Keyword: 1.6 Ma
Temporal Keyword: 1.6 million years
Temporal Keyword: present
Temporal Keyword: 1.6 million years to the present
Temporal Keyword: late Cenozoic
Temporal Keyword: upper Cenozoic
Temporal Keyword: Quaternary
Temporal Keyword: 1.8 Ma
Temporal Keyword: 1.8 million years
Temporal Keyword: Less than 1.8 million years
Temporal Keyword: 1.8 million years ago to the present
Temporal Keyword: Pleistocene to Holocene
Temporal Keyword: Lower Pleistocene to Holocene
Temporal Keyword: Early Pleistocene to Holocene
Temporal Keyword: Pleistocene
Temporal Keyword: Holocene
Access Constraints: none
Use Constraints: Acknowledgement of the authors and the Oregon Department of Geology and Mineral Industries would be appreciated in products derived
from these data.
Point of Contact:
Contact
Person Primary:
Contact Address:
Address Type: mailing and physical address
Address:
Department of
Earth and Environment,
City:
State or
Province:
Postal Code: 17604
Contact Voice Telephone: 1-717-291-3818
Contact Electronic Mail Address: stan.mertzman@fandm.edu
Contact Instructions: contact via electronic mail is preferred
Browse Graphic:
Browse Graphic File Name: AspenLakeMap30x36.pdf
Browse
Graphic File Description: The
AspenLakeMap30x36.pdf file contains the Preliminary Geologic Map of the
Open-File Report O-07-17. This map was made from the data provided in this data set. The basic image in this map (the 1985 USGS Aspen Lake 7.5’ quadrangle overlain by the formations, formation boundaries/contacts, sample symbols, earthquake epicenters locations, and the faults) was created in MapInfo Professional version 7.0 using the data available in this data set (AspenLakeQuadforTransparent.TAB, AspenLakeUnits.TAB, AspenLakeUnitBounds.TAB, AspenLakeFaults.TAB, and AspenLakesSamples.TAB). This image was exported from MapInfo Professional v. 7.0 as a Photoshop Document (.PSD) at a zoom of 1 inch = 1.4 miles, a window size of 7.99 miles (in the export options, the actual window size was doubled from 5.72 inches to 11.44 inches), and with a resolution of 600 pixels per inch. The colors of the resulting .PSD file were adjusted in Adobe Photoshop CS3 to match USGS CMYK color standards. The image was then opened in Adobe Illustrator CS3 where its size was increased by 184.7999% to make the map scale 1:24,000. The sample’s map numbers, the formation labels, and the rest of what is seen on the map, such as the time rock chart and the legend, were added to the map in Adobe Illustrator CS3. Also, different, larger epicenter symbols were overlain on the original epicenter symbols present in the .PSD image. The resulting 30 inch x 36 inch Adobe Illustrator image was saved as a Portable Document Format (.PDF) file and the result is the image of the geologic map seen in the file AspenLakeMap30x36.pdf.
Browse Graphic File Type: PDF
Native Data Set Environment: The majority of the data files in the data set used to make the Preliminary Geologic Map of the Aspen Lake 7.5’ Quadrangle of
Open-File Report 07-17 were
originally created using MapInfo Professional software version 7.0 running
under a Microsoft Windows 2000 Professional operating system. The data that
were digitized in this environment were the geologic formations, the formations
boundaries, the sample locations, and the volcanic centers layers. The faults
and the earthquake epicenters layers were created using MapInfo Professional
software version 7.0 running under a Microsoft Windows XP Professional version
2002 Service Pack 2 operating system. The USGS 7.5’
After the data set had been produced in MapInfo Professional version 7.0, the files were converted using MapInfo’s Universal Translator extension to produce files that could be opened with ESRI ArcMap software version 9.2. This was done by converting the MapInfo TAB files into ESRI SHP format files. The USGS quadrangle drg was reopened and georeferenced anew within ESRI ArcMap. Further modification of the data files occurred within ESRI ArcMap, such as adjustment of attribute names in the attribute table, adjustment of symbol shapes and colors, and setting of the formation regions’ colors to make these features similar to how they appear in the MapInfo Files and on the Open-File Report geologic maps. The ESRI-formatted files (MXD, DBF, PRJ, SBN, SBX, SHP, SHX, AUX, RRD, TFW, TIF, TFWX, and XML) have a total size of 171 MB.
Data Quality Information
Attribute Accuracy:
Attribute Accuracy Report: The attribute accuracy was tested in several ways. For sample, unit boundary, and volcanic center location attributes
(UTM coordinates), accuracy was
assessed by comparison of on-screen representations of the location (digital
maps on the computer screen) to hard copy versions (hand drawn or
similarly-demarcated locations and boundaries on top of paper USGS
quadrangles). On several occasions, the digitized versions of the
The UTM coordinates of the samples provided in the attribute table have a precision that does not reflect that with which their locations on the map were determined. The precision reflects the values that were assigned using MapInfo Professional version 7.0’s Coordinate Extractor extension after manual placement (digitization) of the sample locations on the drg of the USGS 7.5’ Aspen Lake quadrangle based on comparison with the original paper quadrangles on which locations were drawn, or in some cases, based on previously-rounded (to the nearest 10 m) UTM coordinates for samples not shown on the original paper map(s). The accuracy of the locations drawn on the original paper maps may vary. Prior to the year 2000, sampling locations were originally determined by use of a Brunton compass in the field and these data were later translated to the 1:24,000 USGS 7.5’ quadrangles using plastic overlay cards marked with 1:24000 scale UTM coordinate grids or tick marks at relevant, repeated intervals. After the year 2000, Magellan GPS units were used in the field to determine a sample’s collection location, and again these coordinates were placed on the 1:24,000 scale USGS quadrangles using the appropriate plastic overlay card with UTM units.
The Public Land Survey System
(PLSS) attributes (¼ of ¼ Section, ¼ Section, Section, Township, and Range) in
the
The ¼ of ¼ Section and ¼ Section attributes were assigned for each sample based on downloaded grids which displayed the boundaries of the ¼ of ¼ Sections and ¼ Sections of Townships. Because the Section and Township boundaries did not always line up perfectly with those of the underlying quadrangle DRG, at times attributes of samples close to lines in this grid had to be assigned based on mental adjustments or at times, the use of a ruler held up to the screen, by a technician. For this reason, the accuracy of the ¼ of ¼ Section and ¼ Section attributes may be questionable in some cases, particularly in those samples which lie close to the boundaries which demarcate these location descriptors.
The accuracy of a sample’s Unit attribute was tested by a visual check of the sample’s location in relation to the unit boundaries as displayed in MapInfo Professional version 7.0 and by analysis of the chemical data.
The accuracy of the chemical data is dependent on many factors not discussed here. The samples were analyzed by x-ray fluorescence (XRF) at various times and possibly by different machines. All that will be said is that the accuracy of the XRF chemical data is monitored and assessed during the measurement procedure by using an instrument monitor (to account for local climate and machine conditions on the day of measurement), by running several well-measured standards in every batch, and by analyzing the totals counts. That the chemical attributes of each sample in the data table match the originally assigned data from the XRF instrument was tested by the comparison of the sample chemistry table to the original Excel data files that contained the chemistry information provided by the XRF spectrometer. All of the chemical data were derived from these original Excel files, except for those of several of the age-dated samples, which may have values copied from a previous publication by Stanley A. Mertzman (2000). That the chemistry of the dated samples was correctly copied into the data table was checked by comparison of the digital data to the data printed in the publication.
The colors of the units are consistent between adjacent quadrangles mapped in this project and were created as the RGB (only color mode allowed in MapInfo Professional version 7.0) equivalents of standard USGS CMYK colors.
The locations of the epicenters of
Logical Consistency Report: The boundaries of the
intersections, overlaps, and gaps
using MapInfo Professional version 7.0 and no such problems were detected. The
edges of unit polygons have also been checked against those mapped in adjacent
USGS 7.5’ quadrangles as part of this project, but available in other data sets
(
There are three pairs of samples
with duplicate coordinates in the
Completeness Report:
All field-mappable units and unit boundaries
in the USGS 7.5’
necessarily within the
Positional Accuracy:
Horizontal Positional Accuracy:
Horizontal Positional Accuracy Report: The horizontal positional accuracy of the digitized data with regard to the original paper maps has
been checked by visual comparison of the digitized sample locations, formation boundaries, and volcanic centers to the original paper maps when possible. The positional accuracy of the original sample locations on the original paper maps may vary depending on the location-determining methods used as discussed above (Brunton compass or Magellan GPS after the year 2000). The positions of the unit boundaries are approximate and their accuracy has not necessarily been field tested. Analysis of the collected samples (chemistry, hand-sample, and thin sections) and familiarity with the area from lots of time spent in the field by experienced geologists ought to ensure reasonable accuracy of the mapped unit boundaries, although this is not quantifiable. The locations of the faults covered by Quaternary sediments were inferred and their positional accuracy has not been tested.
The locations of the two largest-recorded, inland-Oregon earthquakes are based on data from the Pacific Northwest Seismic Network and
their positional accuracy has not been assessed by anyone working with Stanley A. Mertzman on this mapping project. The Pacific Seismic
Network, however, does rate the
quality of the epicenter positional data (http://www.ess.washington.edu/SEIS/PNSN/HIST_CAT/
catalog.html ).
Lineage:
Source Information:
Source Citation:
Originator:
Publication Date: 1985
Title: Aspen
Edition: Provisional Edition 1985
Geospatial Data Presentation Form: map and raster digital data (digital raster graphic (drg)) of map
Series Information:
Series Name:
Series Issue:
Publication Information:
Publication
Place:
Publisher:
Other Citation Details: A drg of this map
can be downloaded from the
Online
Linkage: UO Libraries website: http://libweb.uoregon.edu/dc/24k_lookup/displaymap.php?ohio_code=42122c1
Source Scale Denominator: 24,000
Type of Source Media: Paper and Online
Source Time Period of Content:
Time Period Information:
Multiple Dates/Times:
Calendar Dates: 1980, 1982, 1985
Source Currentness Reference: 1980 corresponds to the year in which aerial photographs were taken, the map was field checked in
1982, and the map was edited and published in 1985. The year of production of the particular drg used in the data set is not currently known.
Source Citation Abbreviation: 42122c1
Source
Contribution: The
quadrangle was mapped by Stanley
A. Mertzman, his colleagues, and students (the exact
version of the map(s) used as base maps is not currently known). A downloaded drg of the Aspen Lake 7.5 minute quadrangle was used as the
base map for this data set onto which the sample locations, units, and volcanic
centers were copied (digitized) from a paper version (or versions) of the
map(s) produced by the geologists involved in this project. It is also possible
that the sample collection locations came from UTM coordinates provided in a
report by one of the geologists. The faults’ locations were inferred and they
were created in MapInfo on top of the
The locations of the earthquake
epicenters were not copied from a paper version of the
Process Step:
Process Description: The first step in the production of this data set was the collection of rock samples and observations from the field. The
samples’ chemistries were determined by x-ray fluorescence spectroscopy. The hand samples were carefully analyzed and described. Thin sections of the rocks allowed further description of certain samples.
A sample’s collection location was
determined in the field using a Brunton compass prior
to 2000, and with a Magellan GPS unit after 2000. The sample locations were
marked on paper versions of the USGS 7.5’
The AspenLakeSamples attribute table was exported at least one time to Microsoft Excel, where other sample attributes were added and or modified (such as lithology and chemistry data). These Excel spreadsheets were then imported back into MapInfo Professional version 7.0 and the previously extracted UTM coordinates were used to re-plot the sample locations over the 7.5’ quadrangle drg. The drg of the quadrangle was also used in assigning some of the Township, Range, and Section attributes to the samples. Downloaded PLSS grids also aided in assigning these and other PLSS attributes (¼ of ¼ section, ¼ section) to the samples table.
The combination of the analyses of
collected samples and a familiarity with the area from a lot of time spent in
the field allowed Stanley A. Mertzman to discriminate
between and determine the units present within the Aspen
In order to make a layer (AspenLakeUnitBounds) that corresponded to the actual unit boundaries (ground-surface contacts between two rock units), the true unit boundaries (not those cut off at the quadrangle’s edges) were made by tracing (using MapInfo’s trace function) all of the unit polygons’ edges, except those that corresponded with the 4 sides of the quadrangle. This process created the polylines that now represent the unit boundaries/contacts in this data set.
The volcanic centers’ locations were originally determined from field observations and sample analyses. Their locations were
marked on a paper version of the quadrangle with temporary stickers and then digitized by copying the location to the identical spot on the drg of the quadrangle. The UTM coordinates of these locations have been extracted into the volcanic centers attribute table using MapInfo’s Coordinate Extractor tool.
The fault’s location and shape
were inferred based on the local topography and geology combined with the
estimated continuation of a fault present on the Spencer Creek USGS 7.5’
quadrangle to the South of the
The epicenters of
Northwest Seismic Network. Other
attributes were added into this MapInfo earthquake table (AspenLakeQuakes)
based on data also from the Pacific Northwest Seismic Network. The table was
originally projected in the Latitude / Longitude (WGS 84) projection and was
later converted in MapInfo to the UTM zone 10: NAD 27 for
After the creation of final forms of all of the necessary files in MapInfo, the MapInfo Universal Translator Extension was used to
convert the MapInfo-formatted data set to ESRI-format files. This involved converting the mapinfo TAB files of the unit polygons, unit boundaries polylines, sample points, fault polylines, volcanic center points, and earthquake epicenter points to shapefiles (SHPs). These files were opened and adjusted in ESRI ArcMap version 9.2.
The digital versions of the sample collection locations; units and unit boundaries; and the volcanic centers locations were checked
by visual comparison of the digital data on the computer screen (in MapInfo) or on printed copies to the original source paper maps and final printed or digital (PDF) versions of the resulting maps were assessed by the chief geologist of this project, Stanley A. Mertzman.
Source Used Citation Abbreviation: 42122c1
Process Date: 2007
Process Contact:
Contact Information:
Contact Person Primary:
Contact Person: Isaac Weaver
Contact Position: Research Assistant
Contact Address:
Address Type: mailing and physical address
Address: Isaac Weaver,
City:
State or
Province:
Postal Code: 17604
Contact Voice Telephone: Unavailable
Contact Electronic Mail Address:
Indirect Spatial Reference: This data set contains files with point data locations at which rock samples were collected from outcrops, polygons of the geologic
units, polylines
of the unit boundaries (contacts), polylines of
faults, point data volcanic center locations, and point data earthquake
epicenter locations (
Direct Spatial Reference Method: Point, Vector, and Raster
Horizontal Coordinate System Definition:
Planar:
Grid Coordinate System:
Grid Coordinate System Name: Universal Transverse Mercator
Universal Transverse Mercator:
UTM Zone Number: 10
Transverse Mercator:
Scale
Factor at
Longitude
of
Latitude of Projection Origin: 0.000000
False Easting: 500000.000000
False Northing: 0.000000
Planar Coordinate Information:
Planar Coordinate Encoding Method: coordinate pair
Coordinate Representaion:
Abscissa Resolution: 0.01
Ordinate Resolution: 0.01
Planar Distance Units: meters
Geodetic Model:
Horizontal Datum Name: North American Datum of 1927
Ellipsoid Name: Clarke 1866
Semi-major Axis: 6378206.4
Denominator of Flattening Ratio: 294.9787
Detailed Description:
Entity Type:
Entity Type Label: Unit
Entity Type Definition: A rock unit (or just unit), with regard to this data set, is a body of rock with a limited range of lithological
characteristics (as determined by analyses
of outcrops and samples in the field and in the laboratory) that can be
distinguished from other bodies of rocks by observations made in the field
(such as analysis of outcrops or hand-samples collected from them). That is to
say, a unit is field-mappable according to the
definition used in the creation of this data set. Nevertheless, the chemistry
data and other observations not possible in the field were still considered in
determining and discriminating the units. In the
Detailed descriptions of the units
found within the
Entity
Type Definition Source: See Mertzman et al. (2007)
for detailed descriptions of the units found within the
Attribute:
Attribute Label: Symbol
Attribute Definition: The symbol is a form of shorthand text, specific to a unit, that is created by combining age and lithology information with
an abbreviated form of the unit’s name. The symbol attribute is meant to be displayed on the final geologic map to save space while identifying the unit, or it can be displayed when viewing the data on a computer. It is intended that the symbol convey age, lithology, and unit name information. The first letter is capitalized and represents the period-age of the formation (T=Tertiary and Q=Quaternary). If the first letter of the symbol is a capital T, then the second letter represents the epoch-age of the formation (p=Pliocene and m=Miocene). It should be noted that these first two letters only represent the oldest dated age of the formation. Therefore, a unit’s age may span from period to period or epoch to epoch, but this cannot be discerned from the symbol. The remaining letters in the symbol indicate the lithology of the formation and its name. The lithology (b=basalt, ba= basaltic andesite, and a=andesite, for volcanic units) comes first after the age information in the abbreviation of the unit’s name, which is usually based on an outstanding geographic or topographic feature present in the area of the unit. The vent deposits, the intrusive body of rock, and the Quaternary sedimentary units do not follow this pattern, are treated more generally, and only have the age information followed by a general lithology abbreviation because these units (sub-units) do not have specific names based on a geographic feature.
Attribute Definition Source: None
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: Qal
Enumerated Domain Value Definition: Alluvium (Holocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qg
Enumerated Domain Value Definition: Undifferentiated colluvium and alluvium (Holocene and Pleistocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qs
Enumerated Domain Value Definition: Lacustrine deposits (Holocene and Pleistocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007)
Enumerated Domain:
Enumerated Domain Value: Qbv
Enumerated Domain Value Definition: Basaltic to basaltic andesite vent deposits (Pleistocene). This unit should be considered
a sub-unit of the unit in which it is found. Qbv is present in several different units. The Qbv found in one unit may appear very similar to the Qbv in another unit in terms of macroscopic lithological properties, but they differ chemically and/or in the lithologies of their more slowly cooled equivalents (the lava that flowed from the vent and solidified as the
surrounding unit).
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qbrl
Enumerated Domain Value Definition: Basalt of Round Lake (Middle Pleistocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qbdc
Enumerated Domain Value Definition: Basalt of Denny Creek (Lower to Middle Pleistocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qbaa
Enumerated Domain Value Definition: Basaltic Andesite of Aspen Butte (Lower to Middle Pleistocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qbah
Enumerated Domain Value Definition: Basaltic Andesite of High Knob (Lower Pleistocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qbac
Enumerated Domain Value Definition: Basaltic Andesite of Clover Butte (Lower Pleistocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qbbp
Enumerated Domain Value Definition: Basalt of Buck Peak (Lower Pleistocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qamh
Enumerated Domain Value Definition: Andesite of Mount Harriman (Lower Pleistocene).
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qawp
Enumerated
Domain Value Definition: Andesite of
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Qid
Enumerated Domain Value Definition: Diorite conduit-forming intrusive rocks of the Aspen Butte composite volcano (Middle
Pleistocene)
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al. 2007).
Attribute:
Attribute Label: Name
Attribute Definition: The Name attribute represents the name of the unit of which the entity is a part. The name combines information on the
lithology of the unit with a geographic feature located within or near the unit’s boundary, such as a mountain or a body of water.
Detailed descriptions of the units
found within the Aspen
Attribute Definition Source: See Mertzman et al. (2007)
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: Alluvium
Enumerated Domain Value Definition: Unconsolidated sediment found in close proximity to modern drainages. Holocene
in age.
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Undifferentiated colluvium and alluvium
Enumerated Domain Value Definition: Unconsolidated sediment whose origin is related to glacial activity. Holocene and
Pleistocene in age.
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Lacustrine deposits
Enumerated Domain
Value Definition: Unconsolidated
sediment found in association with the
basin that is for most or all of the year (depending on spring melt of the previous winter’s snow) a large hay
field in which numerous cattle graze at one time or another. Holocene and Pleistocene in age.
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Basaltic to basaltic andesite vent deposits
Enumerated Domain Value Definition: Poorly lithified to unconsolidated lapilli to ash-sized cinders black to brown to red in color with lesser amounts of similarly colored lava spatter, bombs, and scoria. These deposits mark volcanic vents areas that are often cinder cones. Pleistocene in age.
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated
Domain Value: Basalt of
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this
unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Basalt of Denny Creek
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated
Domain Value: Basaltic Andesite of Aspen
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Basaltic Andesite of High Knob
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated
Domain Value: Basaltic Andesite of Clover
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated
Domain Value: Basalt of
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated
Domain Value: Andesite
of
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated
Domain Value: Andesite
of
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Enumerated Domain:
Enumerated Domain Value: Diorite conduit-forming intrusive rocks of the Aspen Butte composite volcano
Enumerated Domain Value Definition: See Mertzman et al. (2007) for a detailed description of this unit.
Enumerated Domain Value Definition Source: Open-File Report O-07-17 (Mertzman et al., 2007).
Attribute:
Attribute Label: Age_Geologic_Time_Scale
Attribute Definition: The Age_Geologic_Time_Scale represents the age of a unit in terms of the “Stage Age” (convention not completely
followed, only Lower, Middle, and Upper are used as classes in this naming category) and “Series Epoch” classifiers of the 2007 International Stratigraphic Chart (International Commission on Stratigraphy, 2007) as defined by dates calculated by Gradstein et al. (2004). The attribute value was determined by a comparison of a unit’s dated age(s) to the stratigraphic age boundaries in the 2007 International Stratigraphic Chart (International Commission on Stratigraphy, 2007). A range of geologic time scale ages may be provided for a unit due to a range of ages calculated for one or more samples therein by K-Ar or 40Ar/39Ar dating methods. This attribute provides a low resolution representation of the age of a unit.
Attribute Definition Source: See Mertzman et al. (2007), International Convention on Stratigraphy (2007), and Gradstein et al. (2004)
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: Holocene
Enumerated Domain Value Definition: < 0.0115 Million years ago (Ma)
Enumerated Domain Value Definition Source: Gradstein et al. (2004), International Convention on Stratigraphy (2007), and
Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Middle Pleistocene
Enumerated Domain Value Definition: 0.781 - 0.126 million years ago (Ma)
Enumerated Domain Value Definition Source: Gradstein et al. (2004), International Convention on Stratigraphy (2007), and
Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Lower Pleistocene
Enumerated Domain Value Definition: 1.806 - 0.781 million years ago (Ma)
Enumerated Domain Value Definition Source: Gradstein et al. (2004), International Convention on Stratigraphy (2007), and
Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Pleistocene
Enumerated Domain Value Definition: 1.806 – 0.0115 Million years ago (Ma)
Enumerated Domain Value Definition Source: Gradstein et al. (2004), International Convention on Stratigraphy (2007), and
Mertzman et al. (2007)
Attribute:
Attribute Label: Age_Ma
Attribute Definition: The Age_Ma attribute describes the absolute age or age-range of a unit in millions of years as determined by the dating of
collected rock samples with K-Ar or 40Ar/39Ar methods. The values are presented with the calculated ages and their error ranges. All units have been age-dated using either of the two aforementioned radiometric dating methods, except for the Qal (Alluvium), Qg (Undifferentiated colluvium and alluvium), and Qs (Lacustrine deposits). The Range domain described below pertains to the radiometrically dated samples. The value for the Qg and Qs units is “unknown Quaternary (<1.806 Ma).” The value for the Qal unit is “unknown Holocene (<0.0115 Ma).” The Qbv and Qid units (sub-unit) are tentatively given the age of the units of which they are considered part since the age dated samples did not come from these areas, except for in the Qbv of the Qbac unit, where a dated-sample was collected.
Attribute Definition Source: See Mertzman et al. (2007)
Attribute Domain Values:
Range Domain:
Range Domain Minimum: <0.0115 Ma
Range Domain Maximum: 1.55 +/- 0.04 Ma
Attribute Units of Measure: Millions of years (Ma)
Detailed Description:
Entity Type:
Entity Type Label: Unit Boundary
Entity Type Definition: A unit boundary is the same as a contact. It is the ground-surface (or its trace on the surface, if buried/concealed)
boundary between two rock units. In this data set, the unit boundaries are polylines traced on the unit polygon boundaries (except on
the boundaries that corresponded with the edges of the quadrangle and were not the true unit boundary). The contacts have been approximately located. The unit boundary entities contain no attribute information.
Entity Type Definition Source: None
Attribute:
Attribute Label: AspenLakeUnitBounds
Attribute Definition: This attribute contains no information and was created by MapInfo Professional version 7.0 when the polylines were
created with that program (although it originally had a slightly different name which has since been changed). Each row in this attribute column corresponds to a polyline within the data set, not necessarily the complete length of a unit’s boundary present on the map.
Attribute Definition Source: None
Detailed Description:
Entity Type:
Entity Type Label: Sample
Entity Type Definition: A sample, with regard to this data set, is a field-collected rock specimen from an in situ outcrop (lava flows, vent
deposits, or an igneous intrusion)
located within the boundaries of the Aspen
In the AspenLakeSamples file, sample collection locations are indicated with either a black triangle or with a yellow square with a black outline. The black triangles represent samples for which there is available chemistry data in the attributes table. The yellow squares represent samples that have been age-dated by K-Ar or 40Ar/39Ar dating methods and also have chemistry data in the data table (attribute table).
Entity Type Definition Source: See Mertzman et al. (2007)
Attribute:
Attribute Label: Map_No
Attribute Definition: The Map_No is the map number. It was assigned sequentially to all of the samples after they were organized by age,
formation, and silica content. The samples and their data were organized first by the formation, from oldest to youngest formation. Within each formation the data were further organized by placing age-dated samples before samples that were not age-dated. The age-dated samples for each formation were arranged by silica content, from lowest to highest silica content. Then the non-age-dated samples for each formation were arranged by silica content, from lowest to highest. After the data were organized, the map numbers were assigned sequentially down the data table from 1 to 46.
Attribute Definition Source: None
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 1
Range Domain Maximum: 46
Attribute:
Attribute Label: Sample_No
Attribute Definition: The Sample_No is the combination of numbers and possibly letters that was assigned to a sample when it was collected in
the field, or shortly thereafter. The letters, if present indicate the initials of the person who collected the sample and the first two numbers represent the last two digits of the year in which the sample was collected. After the first two numbers is a dash followed by a unique number that indicates a sample’s place in the order of collection for a particular year.
Attribute Definition Source: None
Attribute Domain Values:
Unpresentable Domain: The values of this attribute were created systematically, but they are not all numerical and there is no very easy
way to describe the domain of these values without creating a sizeable list of the actual values. It is best to understand how the Sample_No attribute was assigned as discussed in the Attribute Definition above.
Attribute:
Attribute Label: KAr_Age_Ma
Attribute Definition: The KAr_Age_Ma is a sample’s absolute age in millions of years as determined by K-Ar or 40Ar/39Ar dating methods.
Not all samples collected in the
Attribute Definition Source: Consult Mertzman et al. (2007)
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.47 +/- 0.04
Range Domain Maximum: 1.36 +/- 0.04
Attribute Units of Measure: Millions of years (Ma)
Attribute:
Attribute Label: Qtr_of_Qtr
Attribute Definition: The Qtr_of_Qtr attribute is the quarter-quarter section classifier of the Public Land Survey System (PLSS). This attribute
describes in what quarter (NW, NE, SE, SW) of a quarter section of a township a sample was collected. All Township descriptors are according to the grid defined by the Willamette Meridian and Willamette Base Line of the PLSS.
Attribute Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html and
http://www.blm.gov/or/landrecords/legaldescrip.php
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: NW
Enumerated Domain Value Definition: The northwest quarter of a quarter section of a township.
Enumerated Domain Value Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Enumerated Domain:
Enumerated Domain Value: NE
Enumerated Domain Value Definition: The northeast quarter of a quarter section of a township.
Enumerated Domain Value Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Enumerated Domain:
Enumerated Domain Value: SE
Enumerated Domain Value Definition: The southeast quarter of a quarter section of a township.
Enumerated Domain Value Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Enumerated Domain:
Enumerated Domain Value: SW
Enumerated Domain Value Definition: The southwest quarter of a quarter section of a township.
Enumerated Domain Value Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Attribute:
Attribute Label: Qtr_of_Sec
Attribute Definition: The Qtr_of_Sec attribute is the quarter section classifier of the (PLSS). This attribute describes in what quarter section
(NW, NE, SE, SW) of a township a sample was collected. All Township descriptors are according to the grid defined by the Willamette Meridian and Willamette Base Line of the PLSS.
Attribute Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html and
http://www.blm.gov/or/landrecords/legaldescrip.php
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: NW
Enumerated Domain Value Definition: The northwest quarter section of a township.
Enumerated Domain Value Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Enumerated Domain:
Enumerated Domain Value: NE
Enumerated Domain Value Definition: The northeast quarter section of a township.
Enumerated Domain Value Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Enumerated Domain:
Enumerated Domain Value: SE
Enumerated Domain Value Definition: The southeast quarter section of a township.
Enumerated
Domain Value Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Enumerated Domain:
Enumerated Domain Value: SW
Enumerated Domain Value Definition: The southwest quarter section of a township.
Enumerated Domain Value Definition
Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html
Attribute:
Attribute Label: Sec
Attribute Definition: The Sec is the Section of the Township according to the PLSS grid in which the sample was collected. The Section is “a
one-square-mile block of land, containing 640 acres, or approximately one thirty-sixth of a township. Due to the curvature of the Earth, sections may occasionally be slightly smaller than one square mile.” All Township descriptors are according to the grid defined by the Willamette Meridian and Willamette Base Line of the PLSS.
Attribute Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html and
http://www.blm.gov/or/landrecords/legaldescrip.php
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 1
Range Domain Maximum: 35
Attribute:
Attribute Label: T_S
Attribute Definition: The T_S (Township_South) is the value of the horizontal row of townships in the PLSS grid (Willamette Meridian and
Willamette Base Line) in which the sample was collected. The “S” (South) descriptor indicates that the township rows that pertain to this data set are south of the Willamette Base Line of the PLSS. When combined with the R_E (Range) attribute value, this information provides the specific ~36 square mile Township in the Willamette Meridian and Base Line defined grid of the PLSS in which the sample was collected. The other more specific PLSS descriptor attributes were described and discussed above.
Attribute Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html and
http://www.blm.gov/or/landrecords/legaldescrip.php
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 37
Range Domain Maximum: 38
Attribute:
Attribute Label: R_E
Attribute Definition: The R_E (Range_East) is the value of the vertical column of townships in the PLSS grid (Willamette Meridian and
Willamette Base Line) in which the sample was collected. The “E” (East) descriptor indicates that the township columns that pertain to this data set are to the East of the Willamette Meridian. When combined with the T_S attribute value, this information provides the specific ~36 square mile Township in the Willamette Meridian and Base Line defined grid of the PLSS in which the sample was
collected. The other more specific PLSS descriptor attributes were described above.
Attribute Definition Source: Consult http://www-atlas.usgs.gov/articles/boundaries/a_plss.html and
http://www.blm.gov/or/landrecords/legaldescrip.php
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 6
Range Domain Maximum: 7
Attribute:
Attribute Label: UTM_E_m
Attribute Definition: This is the easting value in meters of a sample’s collection location according to the NAD 1927 UTM Zone 10 projection
system. This value was determined with the MapInfo Professional version 7.0 Coordinate Extractor extension. In cases where the
UTM coordinates were already known, the coordinate extractor extracted these same coordinates.
Attribute Definition Source: Consult http://erg.usgs.gov/isb/pubs/factsheets/fs07701.html
Attribute Domain Values:
Range Domain:
Range
Domain Minimum: 572,290.55
Range
Domain Maximum: 582,179.76
Attribute Units of Measure: meters
Attribute:
Attribute Label: UTM_N_m
Attribute Definition: This is the northing value in meters of a sample's collection location according to the NAD 1927 UTM Zone 10
projection system. This value was determined with the MapInfo Professional version 7.0 Coordinate Extractor extension. In cases where the UTM coordinates were already known, the coordinate extractor extracted these same coordinates.
Attribute Definition Source: Consult http://erg.usgs.gov/isb/pubs/factsheets/fs07701.html
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 4,678,106.73
Range
Domain Maximum: 4,691,390.37
Attribute Units of Measure: meters
Attribute:
Attribute Label: Unit
Attribute Definition: This is the unit, indicated by the unit’s symbol, to which a collected rock sample belongs. Samples collected in an area of
Qbv or Qid are grouped with the unit in which the Qbv or Qid is found.
Attribute Definition Source: See Mertzman et al. (2007)
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: Qbrl
Enumerated
Domain Value Definition: Basalt of
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Qbdc
Enumerated Domain Value Definition: Basalt of Denny Creek (Lower to Middle Pleistocene)
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Qbaa
Enumerated
Domain Value Definition: Basaltic Andesite of Aspen
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Qbah
Enumerated Domain Value Definition: Basaltic Andesite of High Knob (Lower Pleistocene)
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Qbac
Enumerated Domain Value
Definition: Basaltic Andesite
of Clover
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Qbbp
Enumerated
Domain Value Definition: Basalt of
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Qamh
Enumerated
Domain Value Definition: Andesite of
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Enumerated Domain:
Enumerated Domain Value: Qawp
Enumerated
Domain Value Definition: Andesite of
Enumerated Domain Value Definition Source: See Mertzman et al. (2007)
Attribute:
Attribute Label: Lith
Attribute Definition: The Lith attribute is, in most cases, an abbreviation of the lithology of the sample according to the total alkali (Na2O +
K2O (weight%(wt%))) versus silica (SiO2 wt%) classification (TAS classification) for volcanic rocks of Le Maitre (2002). For the non-volcanic, but intrusive diorite samples, diorite (Di) is the lithology. The chemistry of the sample was determined by x-ray fluorescence (XRF) spectroscopy. Macroscopic characteristics of the various lithologies are not discussed here.
Attribute Definition Source: See Mertzman et al. (2007) and Le Maitre (2002)
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: B
Enumerated Domain Value Definition: Basalt: a volcanic rock with a silica content of 45-52 wt% and less than 5 wt% total
alkali (Na2O + K2O wt%) content.
Enumerated Domain Value Definition Source: See Mertzman et al. (2007) and Le Maitre (2002)
Enumerated Domain:
Enumerated Domain Value: BA
Enumerated Domain Value Definition: Basaltic Andesite: a volcanic rock with 52-57 wt% silica content and a total alkali
content of less that 5 wt% at 52 wt% SiO2 and less than 5.9 wt% at 57 wt% SiO2. Between 52 and 57 wt% SiO2, the upper total alkali boundary increases linearly from 5 to 5.9 wt%.
Enumerated Domain Value Definition Source: See Mertzman et al. (2007), Le Maitre (2002) and
http://www.geol.lsu.edu/henry/Geology3041/lectures/02IgneousClassify/IUGS-IgneousClassFlowChart.htm.
Enumerated Domain:
Enumerated Domain Value: A
Enumerated Domain Value Definition: Andesite: a volcanic rock with a silica content of 57-63 wt% and a total alkali content
of less than 5.9 wt% at 57 wt% SiO2 and less than 7 wt% at 63 wt% SiO2. Between 57 and 63 wt% SiO2, the upper total alkali boundary increases linearly from 5.9 wt% to 7 wt%.
Enumerated Domain Value Definition Source: See Mertzman et al. (2007), Le Maitre (2002), and
http://www.geol.lsu.edu/henry/Geology3041/lectures/02IgneousClassify/IUGS-IgneousClassFlowChart.htm
Enumerated Domain:
Enumerated Domain Value: Di
Enumerated Domain Value Definition: Diorite: with regards to this data set, diorite should be considered as the intrusive/
plutonic, and thus slowly cooled equivalent of basaltic andesite to andesite. In this case, the diorite is the plutonic equivalent to the Basaltic Andesite of Aspen Butte. Because it has cooled more slowly than a volcanic rock, it has a more granular, phaneritic-matrix texture than volcanic rocks such as the Basaltic Andesite of Aspen Butte(Mertzman et al., 2007).
Enumerated Domain Value Definition Source: See Mertzman et al. (2007), Le Maitre (2002)
Attribute:
Attribute Label: SiO2_%
Attribute Definition: The weight percent (wt%) of silica (SiO2) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 47.82
Range Domain Maximum: 60.70
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: TiO2_%
Attribute Definition: The weight percent (wt%) of titanium (TiO2) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.60
Range Domain Maximum: 1.47
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: Al2O3_%
Attribute Definition: The weight percent (wt%) of aluminum (Al2O3) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 17.11
Range Domain Maximum: 19.16
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: Fe2O3_%
Attribute Definition: The weight percent (wt%) of ferric iron (Fe2O3) in the sample as calculated using results measured by XRF spectroscopy
and Iron Titration.
Attribute Definition Source: See http://fandm.edu/x7991.xml and http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.61
Range Domain Maximum: 11.62
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: FeO_%
Attribute Definition: The weight percent (wt%) of ferrous Iron (FeO) in the sample determined by Iron Titration.
Attribute Definition Source: See http://fandm.edu/x7991.xml and http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.05
Range Domain Maximum: 8.48
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: MnO_%
Attribute Definition: The weight percent (wt%) of manganese (MnO) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.08
Range Domain Maximum: 0.18
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: MgO_%
Attribute Definition: The weight percent (wt%) of magnesium (MgO) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 3.05
Range Domain Maximum: 9.08
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: CaO_%
Attribute Definition: The weight percent (wt%) of calcium (CaO) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 6.31
Range Domain Maximum: 10.87
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: Na2O_%
Attribute Definition: The weight percent (wt%) of sodium (Na2O) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 2.38
Range Domain Maximum: 4.41
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: K2O_%
Attribute Definition: The weight percent (wt%) of potassium (K2O) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.12
Range Domain Maximum: 1.29
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: P2O5_%
Attribute Definition: The weight percent (wt%) of phosphorous (P2O5) in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.10
Range Domain Maximum: 0.39
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: LOI_%
Attribute Definition: True Loss on Ignition: the amount of weight lost or gained (weight percent (wt%)) by the sample after heating to between
900ºC and 950ºC for one hour added to a value that accounts for the changes in weight resulting from the oxidation of ferrous iron.
Attribute Definition Source: See http://fandm.edu/x7991.xml and http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.29
Range Domain Maximum: 2.64
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: Total_%
Attribute Definition: The total weight percent (wt%) is the sum of the weight percent values for SiO2, TiO2, Al2O3, Fe2O3, FeO, MnO,
MgO, CaO, Na2O, K2O, P2O5, and LOI.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 99.19
Range Domain Maximum: 100.52
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: Fe2O3T_%
Attribute Definition: The ferric iron content (wt%) measured by XRF spectroscopy. This is not the true amount of ferric iron originally present
in the rock sample because it also accounts for ferrous iron that was oxidized to ferric iron during the preparation for XRF.
Attribute Definition Source: See http://fandm.edu/x7991.xml and http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 5.75
Range Domain Maximum: 11.68
Attribute Units of Measure: weight percent (wt%)
Attribute:
Attribute Label: Rb_ppm
Attribute Definition: The amount (in parts per million (ppm)) of rubidium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: <0.5
Range Domain Maximum: 23.7
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Sr_ppm
Attribute Definition: The amount (in parts per million (ppm)) of strontium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 330
Range Domain Maximum: 1294
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Y_ppm
Attribute Definition: The amount (in parts per million (ppm)) of yttrium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 11.3
Range Domain Maximum: 32.6
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Zr_ppm
Attribute Definition: The amount (in parts per million (ppm)) of zirconium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 44
Range Domain Maximum: 164
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: V_ppm
Attribute Definition: The amount (in parts per million (ppm)) of vanadium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 95
Range Domain Maximum: 221
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Ni_ppm
Attribute Definition: The amount (in parts per million (ppm)) of nickel present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 21
Range Domain Maximum: 167
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Cr_ppm
Attribute Definition: The amount (in parts per million (ppm)) of chromium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 16
Range Domain Maximum: 277
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Nb_ppm
Attribute Definition: The amount (in parts per million (ppm)) of niobium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 1.8
Range Domain Maximum: 9.5
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Ga_ppm
Attribute Definition: The amount (in parts per million (ppm)) of gallium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 17.3
Range Domain Maximum: 22.3
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Cu_ppm
Attribute Definition: The amount (in parts per million (ppm)) of copper present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 19
Range Domain Maximum: 126
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Zn_ppm
Attribute Definition: The amount (in parts per million (ppm)) of zinc present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 44
Range Domain Maximum: 91
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Co_ppm
Attribute Definition: The amount (in parts per million (ppm)) of cobalt present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 17
Range Domain Maximum: 48
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Ba_ppm
Attribute Definition: The amount (in parts per million (ppm)) of barium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 102
Range Domain Maximum: 553
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: La_ppm
Attribute Definition: The amount (in parts per million (ppm)) of lanthanum present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 4
Range Domain Maximum: 27
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Ce_ppm
Attribute Definition: The amount (in parts per million (ppm)) of cesium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 7
Range Domain Maximum: 45
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: U_ppm
Attribute Definition: The amount (in parts per million (ppm)) of uranium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: <0.5
Range Domain Maximum: 2.6
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Th_ppm
Attribute Definition: The amount (in parts per million (ppm)) of thorium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: <0.5
Range Domain Maximum: 5
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Sc_ppm
Attribute Definition: The amount (in parts per million (ppm)) of scandium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 13.7
Range Domain Maximum: 34
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Pb_ppm
Attribute Definition: The amount (in parts per million (ppm)) of lead present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: <1
Range Domain Maximum: 12
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Yb_ppm
Attribute Definition: The amount (in parts per million (ppm)) of ytterbium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.8
Range Domain Maximum: 2.1
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: Be_ppm
Attribute Definition: The amount (in parts per million (ppm)) of beryllium present in the sample as measured by XRF spectroscopy.
Attribute Definition Source: See http://fandm.edu/x7985.xml
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 0.9
Range Domain Maximum: 1.6
Attribute Units of Measure: parts per million (ppm)
Attribute:
Attribute Label: DatedOrNot
Attribute
Definition: This attribute is only
present in the ESRI Shapefile formatted Aspen
attribute indicates if a sample was age-dated or not.
Attribute Definition Source: None
Attribute Domain Values:
Enumerated Domain:
Enumerated Domain Value: Y
Enumerated Domain Value Definition: The Y stands for “Yes,” meaning that this rock sample has been age-dated by K-Ar or
40Ar/39Ar dating methods.
Enumerated Domain Value Definition Source: None
Enumerated Domain:
Enumerated Domain Value: N
Enumerated Domain Value Definition: The N stands for “No,” meaning that this rock sample has not been age-dated with
radiometric dating methods.
Enumerated Domain Value Definition Source: None
Detailed Description:
Entity Type:
Entity Type Label: Volcanic Center
Entity Type Definition: A volcanic center is a source of volcanic rocks. In other words, it is a location where subterranean magma has erupted
onto the surface. The locations of
the some of the volcanic centers in the
Entity Type Definition Source: See Mertzman et al. (2007) for a description of the vent deposits.
Attribute:
Attribute Label: UTM_E_m
Attribute Definition: This is the easting value in meters of a volcanic center's location according to the NAD 1927 UTM Zone 10 projection
system. This value was determined with the MapInfo Professional version 7.0 Coordinate Extractor tool.
Attribute Definition Source: None
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 572,560.16
Range Domain Maximum: 582,186.85
Attribute Units of Measure: meters
Attribute:
Attribute Label: UTM_N_m
Attribute Definition: This is the easting value in meters of a volcanic center's location according to the NAD 1927 UTM Zone 10 projection
system. This value was determined with the MapInfo Professional version 7.0 Coordinate Extractor tool.
Attribute Definition Source: None
Attribute Domain Values:
Range Domain:
Range Domain Minimum: 4,678,377.8
Range Domain Maximum: 4,691,402.24
Attribute Units of Measure: meters
Detailed Description:
Entity Type:
Entity Type Label: Fault
Entity Type Definition: A fault is a planar fracture or area of fractured rock where there is relative movement of large bodies of rock. There
are two prominent faults in the Aspen Lake USGS 7.5’ Quadrangle. These faults are normal faults with the relatively down-dropped block (hanging wall) to the east and the relatively up-lifted block (footwall) to the west. The dashed lines with the hatch marks/ tick marks/ bars represent the inferred location of the fault where the fault trace is buried/ concealed. The solid line with hatch marks/ tick marks/ bars represents the approximate location of the fault trace. The hatch marks/ tick marks/ bars are on the down-dropped block
(hanging wall), which is to the east of the fault.
Entity Type Definition Source: See Mertzman et al. (2007), http://volcanoes.usgs.gov/Products/Pglossary/fault.html ,
http://www.ucmp.berkeley.edu/glossary/glossary_2.html , http://earthquake.usgs.gov/learning/glossary.php?term=fault%20plane ,
http://www2.nature.nps.gov/geology/usgsnps/deform/ghangft.html , and http://en.wikipedia.org/wiki/Fault_%28geology%29
Attribute Definition Source: None
Enumerated Domain Value: Approximate
Enumerated Domain Value Definition Source: None
Enumerated Domain Value: Concealed
with hatch marks that lie on the down-dropped block / hanging wall.
Enumerated Domain Value Definition Source: None
Attribute Label: Type_of_Fault
Attribute Definition: This attribute indicates the type of fault present.
Attribute Definition Source: None
Enumerated Domain Value: Normal
(in other words, one body of rock slides down along the fault relative to the other body of rock).
Enumerated Domain Value Definition Source: Consult
http://eqseis.geosc.psu.edu/~cammon/HTML/Classes/IntroQuakes/Notes/faults.html
Attribute Definition: These are notes with important details about the fault.
Attribute Definition Source: None
Enumerated Domain Value: Down-dropped block is to the east of the fault.
Enumerated Domain Value Definition Source: Please see Mertzman et al. (2007) and
http://eqseis.geosc.psu.edu/~cammon/HTML/Classes/IntroQuakes/Notes/faults.html
Entity Type Label: Oregon’s Largest-Recorded, Inland Earthquakes
between
the rings and the dot.
Attribute Label: Date_of_Quake_UTC_yyyy_mm_dd
http://wwwghcc.msfc.nasa.gov/utc.html , and http://www.pnsn.org/recenteqs/glossary.htm
Enumerated
Domain Value: 1993/09/21
Attribute Label: Time_of_Quake_UTC_hh_mm_ss
http://www.ess.washington.edu/SEIS/PNSN/HIST_CAT/catalog.html.
http://wwwghcc.msfc.nasa.gov/utc.html , and http://www.pnsn.org/recenteqs/glossary.htm
Enumerated
Domain Value: 03:28:55
epicenters)
when the rupture along the fault that led to the earthquake began.
Enumerated
Domain Value Definition Source: Consult
Mertzman et al. (2007),
http://www.pnsn.org/INFO_GENERAL/basic.html#UTC
, and http://wwwghcc.msfc.nasa.gov/utc.html
Enumerated
Domain Value: 05:45:35
Enumerated
Domain Value Definition Source: Consult
Mertzman et al. (2007),
http://www.pnsn.org/INFO_GENERAL/basic.html#UTC
, and http://wwwghcc.msfc.nasa.gov/utc.html
Attribute Label: Latitude_N_degrees
Attribute Definition
Source: See http://www.pnsn.org/OPS/staformat.html
,
Attribute Label: Longitude_E_degrees
Attribute Definition
Source: See http://www.pnsn.org/OPS/staformat.html
,
Attribute Definition Source: None
Range Domain Minimum: 4,684,466.34
Range Domain Maximum: 4,688,879.77
Attribute Units of Measure: meters
Attribute Definition Source: None
Range Domain Minimum: 578,338.23
Range Domain Maximum: 580,860.29
Attribute Units of Measure: meters
http://www.pnsn.org/recenteqs/glossary.htm
Enumerated Domain Value Definition Source: Please see http://www.pnsn.org/recenteqs/glossary.htm
Attribute Label: Richter_Magnitude_Ml
Attribute Definition
Source: Consult http://www.pnsn.org/recenteqs/glossary.htm
Attribute Units of Measure: Values are according to the
Richter Magnitude local magnitude (Ml) scale.
alphabetic A to D scale where A indicates good quality and D indicates bad/poor quality. The two letters appear in a sequence such as AA or BA. The first letter in the sequence pertains to what is known as the RMS time residual, “an estimate of how much misfit there is between the observed arrival times (of the earthquake wave at a seismic station) and those (times) that are calculated (based on a crude velocity model” (The Pacific Northwest Seismic Network, 2002). It seems that the lower the misfit of the calculated and the actual arrival times, the better the quality of the data. “The second quality factor relates to how well (The Pacific Northwest Seismic Network) stations surround the earthquake, and to whether the nearest station is close enough to constrain depth” (The Pacific Northwest Seismic Network, 2002). Finally, the website of the Pacific Northwest Seismic Network goes on to say that “A "CC or better" quality solution means that the event is reasonably well surrounded by stations, and that observed arrival-times of the waves at the various stations are reasonably consistent” (The Pacific Northwest Seismic Network, 2002). Based on an investigation of assessments of other earthquakes on the Pacific Northwest Seismic Network’s website, it appears that a quality (QUAL) rating of AD is poor.
Attribute Definition
Source: Please see http://www.pnsn.org/INFO_GENERAL/basic.html#UTC
and
http://www.pnsn.org/SEIS/EQ_Special/WEBDIR_03092214064n/welcome.html
(http://www.pnsn.org/SEIS/EQ_Special/WEBDIR_03092214064n/welcome.html), it seems that the quality
http://www.pnsn.org/SEIS/EQ_Special/WEBDIR_03092214064n/welcome.html
Attribute Label: Felt_Yes_or_No
was not known to have been felt the value is “No.”
Both of Oregon’s largest-recorded, inland earthquakes were felt by people.
Enumerated
Domain Value Definition Source: None,
but consult http://www.ess.washington.edu/SEIS/
PNSN/HIST_CAT/catalog.html as a source
Enumerated Domain Value: 22.7 km WNW of Klamath Falls, OR
Enumerated
Domain Value Definition Source: None,
but value from http://www.ess.washington.edu/SEIS/
Enumerated Domain Value: 23.6 km ESE of Mt McLoughlin, OR
east-southeast of Mount McLoughlin, Oregon.
Enumerated
Domain Value Definition Source: None, but value from http://www.ess.washington.edu/SEIS/
attributes, which were derived from the latitude and longitude coordinates, respectively).
Attribute Definition Source: None
Enumerated Domain Value: The Pacific Northwest Seismic Network, 2003
The Pacific Northwest Seismic Network. (2003, March 27). List of magnitude 4.0 or larger
earthquakes
in Washington and Oregon. Retrieved October 23, 2007, from http://www.ess.washington.
edu/SEIS/PNSN/HIST_CAT/catalog.html.
Enumerated
Domain Value Definition Source: None,
but the data are (except UTM coordinates) from:
http://www.ess.washington.edu/SEIS/PNSN/HIST_CAT/catalog.html
Metadata
Reference Information
Contact Position: Research Assistant
Address Type: mailing and physical address
State or Province: Pennsylvania
Contact Voice Telephone: Unavailable
Contact Electronic Mail Address: iweaver@fandm.edu
Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata