Geologic Map of the Bryant Mountain and Langell Valley Quadrangles, Klamath County, Oregon

Citation:

Citation Information:

Originator: Oregon Department of Geology and Mineral Industries (DOGAMI)
Publication Date: 2004
Publication Time: Unknown
Title: Geologic Map of the Bryant Mountain and Langell Valley Quadrangles, Klamath County, Oregon
Edition: Version 1.0
Geospatial Data Presentation Form: Vector digital data
Publication Information:

Publication Place: Portland, Oregon
Publisher: Oregon Department of Geology and Mineral Industries

Description:

Abstract:
The area covered by this map is located in south-central Oregon in the central part of Klamath County. The two principal geographic features in the area are Langell Valley, a broad, flat valley occupying the center of the map, and Bryant Mountain, a large, high-elevation area that occupies the western part of the map. Langell Valley is a fault-bounded graben, which appears to be a half-graben or trapdoor graben with larger displacements on its west side than on its east side. Bryant Mountain is a large horst, with major displacement faults (up 750 m) on its east and west sides. All of the faulting in the area is Basin and Range type high-angle normal faulting. Relationships within the mapped area suggest three periods of faulting. North-trending faults are oldest in the area. These in are cut by the most topographically prominent set of faults, trending approximately northwest-southest. Less prominent in the landscape, but possibly essential to understanding the hydrology of the area are the youngest east-west trending faults.

The geologic history revealed in the outcrops within the mapped area began with the eruption of a series of trachyandesite and basaltic trachyandesite flows. Dates from the uppermost flows in this section are in the range of 7-8 Ma. The lava flows are interbedded with fine-grained sediments and many appear to be water-affected, having interacted with water while they were flowing and cooling. This section of flows appears to have formed topographic higher areas during the following eruption of the younger basaltic flows and continued deposition of sediments. Thus, these younger flows, with dates in the range of 5-7 Ma, appear to have thinned against the basaltic andesite highs. Some of the basaltic flows also interacted with water, with both pillowed and water affected flows. The basaltic flows exposed on Bryant Mountain fall within distinct chemical, special, petrographic, and perhaps age groups. The flows on the southwest side of the mountain have Basin and Range chemical affinities and ophitic textures, while the flows in the northern part of the mountain have Snake River Plain affinities and diktytaxitic textures. The flows in the eastern side of the Langell Valley generally have transitional chemical affinities, and a mix of petrographic textures.

Purpose:
The digital geologic map database for the two quadrangles have been created as a general-purpose data set that is applicable to land-related investigations in the earth and biological sciences. The quadrangles' database have been generated to further our understanding of bedrock and surficial processes at work in the region and to document evidence for seismotectonic activity in Oregon. The database is designed to serve as a base layer suitable for ecosystem and mineral resource assessment and for building a hydrogeologic framework for the basin(s) in which it occurs. The database is not suitable for site-specific geologic evaluations.
Supplemental Information:
The CD contains digital files with various map coverages created in MapInfo Professional version 7.0 (.tab) and a screen graphic of the map in Adobe PDF format. Digital map coverages are also provided as ArcView version 3.3 Shapefile (.shp) format for ESRI users. Accompanying the screen graphic of the map, is a text file (pdf format) describing the map units, a discussion of the quadrangle's geologic history, and an assessment of the quadrangle's geologic hazards and resources. This data is not field-checked and comes with no guarantees as to its accuracy.
Time Period of Content:

Time Period Information:

Multiple Dates/Times:

Single Date/Time:

Calendar Date: 1999
Time of Day: Unknown

Currentness Reference: publication date

Status:

Progress: Complete
Maintenance and Update Frequency: None planned

Spatial Domain:

Bounding Coordinates:

West Bounding Coordinate: -121.375
East Bounding Coordinate: -121.125
North Bounding Coordinate: 42.125
South Bounding Coordinate: 42

Keywords:

Theme:

Theme Keyword Thesaurus: None
Theme Keyword: Earth science
Theme Keyword: Geology
Theme Keyword: Economic geology

Place:

Place Keyword Thesaurus: None
Place Keyword: United States
Place Keyword: Oregon
Place Keyword: North America
Place Keyword: Pacific Northwest

Stratum:

Stratum Keyword Thesaurus: None

Temporal:

Temporal Keyword Thesaurus: None

Access Constraints: Public access - Purchased at a nominal fee. To ensure distribution of the most current public information, please refer requests for data to the Nature of the Northwest.
Use Constraints:
User should use caution when overlaying other data sets and should not make legally binding decisions from this data. These data are subject to change. Acknowledgment of the USGS/DOGAMI would be appreciated in products derived from these data. Any person using the information presented here should fully understand the data collection and compilation process before beginning their analysis/use. The burden of determining fitness for use lies with the user.

To avoid the risk of misinterpretation, invalid results, and erroneous conclusions, the users must consider original map scale, collection methodology, currency of data, and any other conditions specific to every data element and each dataset as a whole. Potential users are advised to consult with DOGMAI to gain an understanding of the inherent limitations of this data set and its scope of inference. Also, the user must be aware that errors and conditions originating from physical sources involved in developing a dataset may be reflected in the data, and that the digital processing performed during preparation, storage, and transmission of the dataset may have exacerbated such errors and/or introduced additional ones.

Point of Contact:

Contact Information:

Contact Person Primary:

Contact Person: Margi D. Jenks
Contact Organization: Oregon Department of Geology and Mineral Industries

Contact Position: Geologist
Contact Address:

Address Type: mailing and physical address
Address: 800 NE Oregon Street, #28
City: Portalnd
State or Province: Oregon
Postal Code: 97232
Country: USA

Contact Voice Telephone: 503/731-4100 ext. 236
Contact Facsimile Telephone: 503/731-4066
Contact Electronic Mail Address: margi.jenks@dogami.state.or.us
Hours of Service: 8:00 a.m. to 5:00 p.m., Monday through Friday

Browse Graphic:

Browse Graphic File Name: GMS117map.pdf
Browse Graphic File Description: Map showing extent and file names of map data
Browse Graphic File Type: pdf

Data Set Credit:
U.S. Department of the Interior, Bureau of Reclamation Grant (No. 99-FG-20-0115) provided the funding for this mapping project. The Oregon Department of Geology and Mineral Industries created and maintains the spatial data sets. Credit should always be given to the data source and/or originator when the data is transferred or printed.

Security Information:

Security Classification System: None
Security Classification: None
Security Handling Description: None

Native Data Set Environment: MapInfo GIS .tab format, MapInfo Corp., Troy, NY.

Attribute Accuracy:

Attribute Accuracy Report: The accuracy of the attributes is unknown

Logical Consistency Report:
Spatial data is presented in the form of polygons, lines, and points characterizing the geology only in the quadrangles. This dataset does not have topology. However, polygons were checked for misalignment errors such as slivers, overlaps, bow ties, splits, and missing nodes. Where found errors were corrected. The geology was delineated by the geologist on a 1:24,000, 7.5-minute USGS topographic quadrangle. Check plots of the map were reviewed by the mapper and cartographer for consistency with basic geologic principles and general conformity to USGS mapping standards. This data is not field-checked and is an interpretation of the mapper. No guarantees are provided as to its accuracy.
Completeness Report:
The mapping project as originally designed has been completed for two quadrangles. The geology of the two quadrangles are based on relationships gathered from outcrops, float, and rock exposure on foot or vehicle traverses. Portions of both quadrangle may not have been visited or field checked. Interpretation of the geology in the quadrangles may have been supplemented by examination of the land surface using aerial photographs, shaded relief image(s) derived from a Digital Elevation Model (DEM), or both. Rock unit properties are described in the text. All geospatial database elements are attributed.
Positional Accuracy:

Horizontal Positional Accuracy:

Horizontal Positional Accuracy Report:
The data can't be more accurate than the USGS topographic quadrangle from which it was developed. Positional accuracy of geologic contacts vary based on the techiques and quality of mapping. Still the horizontal accuracy of the coverage should be regarded as unknown.
Vertical Positional Accuracy:

Vertical Positional Accuracy Report: Unknown

Lineage:

Source Information:

Source Citation:

Citation Information:

Originator: Oregon Department of Geology and Mineral Industries (DOGAMI)
Publication Date: 2004
Publication Time: Unknown
Title: Geologic Map of the Bryant Mountain and Langell Valley Quadrangles, Klamath County, Oregon
Edition: Version 1.0
Geospatial Data Presentation Form: Vector digital data
Publication Information:

Publication Place: Portland, Oregon
Publisher: Oregon Department of Geology and Mineral Industries

Type of Source Media: CD-ROM
Source Time Period of Content:

Time Period Information:

Single Date/Time:

Time of Day: Unknown

Source Currentness Reference: publication date

Source Citation Abbreviation: GMS-117
Source Contribution: The text accompanying GMS117text.pdf describes the geology used to derive the polygons, and contains a complete listing of references cited.

Process Step:

Process Description:
Field mapping and aerial photograph interpretation; iterative process.
Transfer of geologic linework and point data from field maps and aerial photographs to a scale-stable cartographic base of the quadrangles

Description of Map Units and Correlation of Map Units

Polygons, lines, and points representing geologic features and data points were hand digitized from author-prepared base-stable geologic map at 1:24,000 scale.

The resultant coverages were attributed with data describing the geologic units, contacts, structures and point locations.

Draft check plots of the geologic map and explanation were created and submitted for peer review. Revisions were made to the geospatial database as needed.

Prior to release of map-on-demand files and metadata, the author was given final digital data sets and paper plots for checking against the source map(s) to verify the linework and attributes. Also, the author was asked to check the metadata and accompanying files for completeness and accuracy.

Process Date: Unknown
Process Contact:

Contact Information:

Contact Person Primary:

Contact Person: Margi D. Jenks
Contact Organization: Oregon Department of Geology and Mineral Industries

Contact Position: Geologist
Contact Address:

Address Type: mailing and physical address
Address: 800 NE Oregon Street, #28
City: Portalnd
State or Province: Oregon
Postal Code: 97232
Country: USA

Contact Voice Telephone: 503/731-4100 ext. 236
Contact Facsimile Telephone: 503/731-4066
Contact Electronic Mail Address: margi.jenks@dogami.state.or.us
Hours of Service: 8:00 a.m. to 5:00 p.m., Monday through Friday

Cloud Cover: Unknown

Direct Spatial Reference Method: Vector

Horizontal Coordinate System Definition:

Planar:

Grid Coordinate System:

Grid Coordinate System Name: Universal Transverse Mercator 1927
Universal Transverse Mercator:

UTM Zone Number: 10
Transverse Mercator:

Scale Factor at Central Meridian: 0.9996
Longitude of Central Meridian: -123
Latitude of Projection Origin: 0
False Easting: 500000
False Northing: 0

Planar Coordinate Information:

Planar Coordinate Encoding Method: Coordinate Pair
Coordinate Representation:

Abscissa Resolution: 0.001
Ordinate Resolution: 0.001

Planar Distance Units: meters

Geodetic Model:

Horizontal Datum Name: North American Datum of 1927
Ellipsoid Name: Clarke 1866
Semi-major Axis: 6378206
Denominator of Flattening Ratio: 294.9786982

Vertical Coordinate System Definition:

Altitude System Definition:

Altitude Datum Name: National Geodetic Vertical Datum of 1929
Altitude Distance Units: feet

Detailed Description:

Entity Type:

Entity Type Label: map_polygons
Entity Type Definition: Polygon features and attribute tables
Entity Type Definition Source: Oregon Department of Geology and Mineral Industries

Detailed Description:

Entity Type:

Entity Type Label: map_faults
Entity Type Definition: Polyline features and attribute tables
Entity Type Definition Source: Oregon Department of Geology and Mineral Industries

Detailed Description:

Entity Type:

Entity Type Label: age_date_points
Entity Type Definition: Point features and attributes
Entity Type Definition Source: Oregon Department of Geology and Mineral Industries

Detailed Description:

Entity Type:

Entity Type Label: Bryant_Langell_chem_pts
Entity Type Definition: Point features and attribute tables
Entity Type Definition Source: Oregon Department of Geology and Mineral Industries

Detailed Description:

Entity Type:

Entity Type Label: dip_points
Entity Type Definition: Point features and attribute tables
Entity Type Definition Source: Oregon Department of Geology and Mineral Industries

Detailed Description:

Entity Type:

Entity Type Label: fossil_points
Entity Type Definition: Point features and attribute tables
Entity Type Definition Source: Oregon Department of Geology and Mineral Industries

Detailed Description:

Entity Type:

Entity Type Label: gravel_pit_points
Entity Type Definition: Point features and attribute tables
Entity Type Definition Source: Oregon Department of Geology and Mineral Industires

Detailed Description:

Entity Type:

Entity Type Label: station_points
Entity Type Definition: Point features and attribute tables
Entity Type Definition Source: Oregon Department of Geology and Mineral Industries

Detailed Description:

Entity Type:

Entity Type Label: Klamwells
Entity Type Definition: Point feature and attribute table
Entity Type Definition Source: Oregon Department of Geology and Mineral Industries

Overview Description:

Entity and Attribute Overview:
The digital map information contains polygon, polyline, and point entities.
Attributes in the map_polygons table are: polygon_id, unit_label, group_name, formation_name, member_name, informal_name, stratigraphic_age, unit_descriptioin, polarity, fossils, chemistry, and notes.

Attributes in the map_faults table are: fault_id, trace_type, style, fault_name, side_down, attitude, and notes.

The following files are point entities: age_date_points, Bryant_Langell_chem_pts, dip_points, fossil_points, gravel_pit_points, station_points, and klamwells.

Attributes in the age_date_points table are: Project_ID, UTME, UTMN, Elevation, KArAge, Polarity, Unit, and Note.


Attributes in the Bryant_Langell_chem_pts table are: Map_No, Project_ID, Station_Number, UTME, UTMN, Elevation, Samples, Polarity, Polstats, Strike1, Dip1, Strike2, Dip2, Unit, and Note.


Attributes in the dip_points table are: SYM_X, SYM_Y, SYM_Type, SYM_Size, SYM_Rotation, SYM_Dip, and SYM_station.


Attributes in the fossil_points table are: Project_ID, Station_Number, UTME, UTMN, Elevation, Samples, Polarity, Polstats, Strike1, Dip1, Strike2, Dip2, Unit, and Note.


Attributes in the gravel_pit_points table are: Station_Number, UTME, UTMN, Elevation, Samples, Polarity, Polstats, Strike1, Dip1, Strike2, Dip2, Unit, and Note.


Attributes in the station_points table are: Project_ID, Station_Number, UTME, UTMN, Elevation, Samples, Polarity, Polstats, Strike1, Dip1, Strike2, Dip2, Unit, and Note.


The attribute in the klamwells is "Wellno."


For a description of the regional setting, resources, and hazards, in addition to information relating to the data entities and attributes, please see the text that accompanies this publication.

Entity and Attribute Detail Citation: CD contains Microsoft Excel files containing the data in Bryant_Langell_chem_pts, age_date_points, and station_points.

Distributor:

Contact Information:

Contact Person Primary:

Contact Person: Donald Haines
Contact Organization: Nature of the Northwest Information Center

Contact Position: Manager
Contact Address:

Address Type: Mailing and physical address
Address: 800 NE Oregon Street #5
City: Portland
State or Province: Oregon
Postal Code: 97232
Country: USA

Contact Address:

Address Type: mailing and physical address
Address: 800 NE Oregon Street
City: Portland
State or Province: Oregon
Postal Code: 97232
Country: USA

Contact Voice Telephone: 503/872-2750
Contact TDD/TTY Telephone: Unavailable
Contact Facsimile Telephone: 503/731-4066
Contact Electronic Mail Address: don.haines@state.or.us
Hours of Service: 8:00 a.m. to 4:30 p.m. Monday through Friday
Contact Instructions:
Contact Nature of the Northwest Information Center by e-mail, phone, or letter explaining what products are needed.
All DOGAMI publications, both in and out of print, are available for inspection at the Department's offices (most reports "on file" are in the Portland office only) and at many state-document depository libraries in Oregon, including most Oregon college and university libraries. Publications are also available via interlibrary loan from the Oregon State Library, State Library Building, Salem, OR 97310.

Resource Description: Oregon Department of Geology and Mineral Industries Geologic Map Series GMS-117
Distribution Liability:
No warranty, expressed or implied is made regarding the accuracy or utility of the data described and/or contained herein, nor shall the act of distribution constitute any such warranty. This disclaimer applies both to individual use of the data and aggregate use with other data. It is strongly recommended that careful attention be paid to the contents of the metadata file associated with these data. The Oregon Department of Geology and Mineral Industries shall not be held liable for improper or incorrect use of these data.
This information may be updated without notification.

Standard Order Process:

Digital Form:

Digital Transfer Information:

Format Name: .tab
Format Version Number: MapInfo 7.0
Format Specification: Files for MapInfo
Format Information Content: PLEASE NOTE: conversion to shapefile format changes some characters ( # - .) to underscores; item names over 10 characters are truncated.
File Decompression Technique: None

Fees: $10 for CD
Ordering Instructions:
Ordering capability is available through Nature of the Northwest Information Center, 800 NE Oregon Street #5, Portland, Oregon 97232, (503) 872-2750 and a publication list is viewable at: http:/www.naturenw.org
Standard Order Process:

Non-digital Form:
DOGAMI can make a paper copy of the report (printed B/W). Also, a color paper plot (34" x 44") of the GMS-96 can be ordered through the Nature of the Northwest Information Center, a fee for the paper plot of $15 will be charged.
Fees: $15 for a color paper plot.
Ordering Instructions:
Ordering capability is available through Nature of the Northwest Information Center, 800 NE Oregon Street #5, Portland, Oregon 97232, (503) 872-2750 and a publication list is viewable at: http:/www.naturenw.org
Custom Order Process: Contact The Nature of the Northwest Information Center by e-mail, phone, or letter explaining what products are needed.
Technical Prerequisites: Personal computer with GIS data viewing software.

Metadata Date: 1/31/2004
Metadata Review Date: 1/31/2004
Metadata Future Review Date:
Metadata Contact:

Contact Information:

Contact Person Primary:

Contact Person: Clark Niewendorp
Contact Organization: Oregon Department of Geology and Mineral Industries

Contact Position: Cartographer
Contact Address:

Address Type: mailing and physical address
Address: 800 NE Oregon Street #5, Suite 965
City: Portland
State or Province: Oregon
Postal Code: 97232
Country: USA

Contact Voice Telephone: 503/731-4100 x219
Contact Facsimile Telephone: 503/731-4066
Contact Electronic Mail Address: clark.niewendorp@state.or.us
Hours of Service: 7:30 a.m. to 4:30 p.m. Monday through Friday

Metadata Standard Name: FGDC Content Standards for Digital Geospatial Metadata
Metadata Standard Version: Version 2.0
Metadata Time Convention: local time
Metadata Access Constraints: None
Metadata Use Constraints: None
Metadata Security Information:

Metadata Security Classification System: None
Metadata Security Classification: Unclassified
Metadata Security Handling Description: None