<?xml version="1.0" encoding="utf-8"?>
<metadata>
  <idinfo>
    <citation>
      <citeinfo>
        <origin>Oregon Department of Geology and Mineral Industries</origin>
        <pubdate>2026</pubdate>
        <title>Mineral Information Layer for Oregon (MILO).</title>
        <geoform>vector digital data</geoform>
        <serinfo>
          <sername>Oregon Department of Geology and Mineral Industries Digital Data</sername>
          <issue>MILO-4</issue>
        </serinfo>
        <pubinfo>
          <pubplace>Portland, Oregon, USA</pubplace>
          <publish>Oregon Department of Geology and Mineral Industries</publish>
        </pubinfo>
        <onlink>https://www.oregon.gov/dogami/pages/default.aspx</onlink>
        <lworkcit>
          <citeinfo>
            <origin>Oregon Department of Geology and Mineral Industries</origin>
            <pubdate>2026</pubdate>
            <title>Mineral Information Layer for Oregon-Release 4 (MILO-4)</title>
            <edition>Release 4</edition>
            <serinfo>
              <sername>Oregon Department of Geology and Mineral Industries Digital Data</sername>
              <issue>MILO-4</issue>
            </serinfo>
            <pubinfo>
              <pubplace>Portland, Oregon, USA</pubplace>
              <publish>Oregon Department of Geology and Mineral Industries</publish>
            </pubinfo>
            <onlink>https://www.oregon.gov/dogami/pages/default.aspx</onlink>
          </citeinfo>
        </lworkcit>
      </citeinfo>
    </citation>
    <descript>
      <abstract>The Mineral Information Layer for Oregon-Release 4 (MILO-Release 4) is a geospatial database that stores and manages information regarding Oregon's mineral occurrences, prospects, and mines; it is the primary way in which the State extracts, researches, and displays its available historical mining and mineral resource information. This feature class shows mineral-related information for the following commodities: metals (elements, metallic, and oxides), industrial minerals (non-metallic minerals and materials, including gemstones), mineral fuel (coal and oil shale), and aggregate (sand and gravel and stone). MILO contains 24,664 mineral occurrences, prospects, and mines in Oregon. Understand that recreation in or around inactive mine sites is extremely dangerous, and can result in serious injury or death. Stay out and stay alive!</abstract>
      <purpose>The purpose of this MILO-Release 4 is for use as reference material supporting local- to statewide-scale mineral resource and environmental assessments. These data provide a searchable catalogue with links to supporting digital documentation that allows users to extract, research, and display historical mining and mineral resource information.</purpose>
    </descript>
    <timeperd>
      <timeinfo>
        <sngdate>
          <caldate>08/01/1991-08/31/2024</caldate>
        </sngdate>
      </timeinfo>
    </timeperd>
    <status>
      <progress>Planned</progress>
      <update>Biennial</update>
    </status>
    <spdom>
      <bounding>
        <westbc>-124.777324</westbc>
        <eastbc>-116.480173</eastbc>
        <northbc>46.258921</northbc>
        <southbc>41.930826</southbc>
      </bounding>
    </spdom>
    <keywords>
      <theme>
        <themekt>ISO 19115 Topic Category</themekt>
        <themekey>geoscientificinformation</themekey>
      </theme>
      <theme>
        <themekt>Oregon Geospatial Enterprise Office Metadata Keyword Thesaurus</themekt>
        <themekey>stone</themekey>
        <themekey>metallic mineral</themekey>
        <themekey>industrial mineral</themekey>
        <themekey>mineral resource</themekey>
        <themekey>zeolite</themekey>
        <themekey>sand and gravel</themekey>
      </theme>
      <theme>
        <themekt>USGS Thesaurus</themekt>
        <themekey>geospatial datasets</themekey>
        <themekey>hazards</themekey>
        <themekey>hazard preparedness</themekey>
        <themekey>scientific interpretation</themekey>
        <themekey>time series datasets</themekey>
      </theme>
      <theme>
        <themekt>Custom</themekt>
        <themekey>MILO (Mineral Information Layer for Oregon)</themekey>
        <themekey>Mine</themekey>
        <themekey>Mineral fuel</themekey>
        <themekey>Aggregate</themekey>
        <themekey>Gemstone</themekey>
        <themekey>Borrow Pit</themekey>
        <themekey>Prospect</themekey>
        <themekey>Quarry</themekey>
        <themekey>Gravel Pit</themekey>
        <themekey>Mineral Occurrence</themekey>
      </theme>
      <place>
        <placekt>Oregon Geospatial Enterprise Office Metadata Keyword Thesaurus</placekt>
        <placekey>United States</placekey>
        <placekey>North America</placekey>
        <placekey>Oregon</placekey>
        <placekey>Baker</placekey>
        <placekey>Benton</placekey>
        <placekey>Clackamas</placekey>
        <placekey>Clatsop</placekey>
        <placekey>Columbia</placekey>
        <placekey>Coos</placekey>
        <placekey>Crook</placekey>
        <placekey>Curry</placekey>
        <placekey>Deschutes</placekey>
        <placekey>Douglas</placekey>
        <placekey>Gilliam</placekey>
        <placekey>Grant</placekey>
        <placekey>Harney</placekey>
        <placekey>Hood River</placekey>
        <placekey>Jackson</placekey>
        <placekey>Jefferson</placekey>
        <placekey>Josephine</placekey>
        <placekey>Klamath</placekey>
        <placekey>Lake</placekey>
        <placekey>Lane</placekey>
        <placekey>Lincoln</placekey>
        <placekey>Linn</placekey>
        <placekey>Malheur</placekey>
        <placekey>Marion</placekey>
        <placekey>Morrow</placekey>
        <placekey>Multnomah</placekey>
        <placekey>Polk</placekey>
        <placekey>Sherman</placekey>
        <placekey>Tillamook</placekey>
        <placekey>Umatilla</placekey>
        <placekey>Union</placekey>
        <placekey>Wallowa</placekey>
        <placekey>Wasco</placekey>
        <placekey>Washington</placekey>
        <placekey>Wheeler</placekey>
        <placekey>Yamhill</placekey>
      </place>
    </keywords>
    <accconst>None</accconst>
    <useconst>REPORT DATA: This product is for informational purposes and may not have been prepared for or be suitable for legal, engineering, or surveying purposes. Users of this information should review or consult the primary data and information sources to ascertain the usability of the information. This publication cannot substitute for site-specific investigations by qualified practitioners. Site-specific data may give results that differ from the results shown in the publication. See the accompanying text report for more details on the limitations of the methods and data used to prepare this publication.</useconst>
    <ptcontac>
      <cntinfo>
        <cntorgp>
          <cntorg>Oregon Department of Geology and Mineral Industries </cntorg>
        </cntorgp>
        <cntaddr>
          <addrtype>mailing and physical address</addrtype>
          <address>800 NE Oregon Street Suite 965</address>
          <city>Portland</city>
          <state>Oregon</state>
          <postal>97232</postal>
          <country>USA</country>
        </cntaddr>
        <cntvoice>1 971 673 1555</cntvoice>
        <cntfax>1 971 673 1562</cntfax>
        <cntemail>dogami-info@dogami.oregon.gov</cntemail>
        <cntinst>When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from https://www.oregon.gov/dogami/pages/default.aspx</cntinst>
      </cntinfo>
      <cntinfo>
        <cntperp>
          <cntper>Carlie J.M. Azzopardi</cntper>
          <cntorg>Oregon Department of Geology and Mineral Industries</cntorg>
        </cntperp>
      </cntinfo>
    </ptcontac>
    <datacred>This update and release of MILO-4 was supported through a grant from the National Geological and Geophysical Data Preservation Program (NGGDPP) under cooperative agreement number G23AP00218-01 (2023). Additional funds were provided by the State of Oregon.</datacred>
    <secinfo>
      <secclass>Unclassified</secclass>
    </secinfo>
  </idinfo>
  <dataqual>
    <attracc>
      <attraccr>Attribute accuracy is tested by manual comparison of the source and hard copy plots. However, for those point that do not have a corresponding mark on a digital U.S. Geological Survey 1:24,000-scale quadrangle (DRG), the accuracy of this data is dependent on (1) detail level (e.g. location information) of the source material and (2) interpretation procedures for capturing that source. Field checking of the data was not performed.</attraccr>
    </attracc>
    <logic>No duplicated features exist although individual point features may overlap and share the same coordinates but have differences in attribute(s). Because the data were collected and reported by numerous people, the descriptions provided are not highly consistent in structure or terminology or similar characteristics may be described differently. In attempt for some consistency some terminology was updated to a single common usage. For example, values Incorporated, Inc, Company, Co, Corporation, and Corp were changed to  Inc., Co., and Corp. respectively when appropriate. Alternatively values Co or Co. were changed to County when applicable. Variations of unnamed or NA, prospect, quarry, sand pit, etc.  were also updated to a single searchable value.</logic>
    <complete>Attribution of the database is generally sparse, meaning that not all fields are attributed. The spatial data are presented in the form of points representing mines, prospects, and occurrences and the coverage is statewide. Some points are spatially located in neighboring states.</complete>
    <posacc>
      <horizpa>
        <horizpar>For mines, prospect, and mineral occurrences (including aggregate sources), the positional quality of each varies widely or is entirely unknown especially where their location information was obtained from older published and unpublished sources. For example, in older sources location information is often reported in a narrative format and are accurate within a mile and most to within a quarter mile. Those in newer publications are usually reported by subdivisions of a section of land (Public Land Survey System or PLSS) or by latitude and longitude, and consequently, are probably accurate within a quarter of a mile, and most within an eighth of a mile. The digitizing method for locating the mines, prospects, and mineral occurrences involved heads-up digitization from U.S. Geological Survey Digital Raster (DRG) Image of 1:24,000-scale quadrangles on the computer screen by using a computer mouse to scribe the feature. With that said the following steps were taken to check each point feature's positional accuracy by 1) matching a mark (symbol) on the DRG and 2) inspecting each 2005 Digital Orthophoto Quarter-Quadrangles (DOQQs) for a mine-related disturbance.  The accuracy of this data depends on a number of different types of errors: geodetic, machine, cartographic, and random errors. Not least of which depends on the level of detail included in the source material and the interpretation procedures for capturing that source. Nevertheless, the positional accuracy for many of the sites is much improved, now at least points overlay corresponding topographic mark. Still accuracy of this data is dependent on the level of detail of the source material and the interpretation procedures for capturing that source, at best this accuracy is no more than 30 to 40 ft.</horizpar>
      </horizpa>
      <vertacc>
        <vertaccr>A combination of lidar 3 ft pixel bare earth DEM (approximately 1 point every 0.3 meters), and a 10m pixel bare earth DEM (approximately 1 point every 10 meters) served as elevation model(s). Not all resources were tested to evaluate the degree to which these inaccuracies exist. Lidar-derived bare earth elevation model vertical accuracy is typically less than 1 foot.</vertaccr>
      </vertacc>
    </posacc>
    <lineage>
      <srcinfo>
        <srccite>
          <citeinfo>
            <origin>Oregon Department of Geology and Mineral Industries</origin>
            <pubdate>2020</pubdate>
            <title>Mineral Information Layer for Oregon, Release 3 [MILO-3]</title>
            <edition>Release 3</edition>
            <geoform>vector digital data</geoform>
            <serinfo>
              <sername>Oregon Department of Geology and Mineral Industries Digital Data</sername>
              <issue>MILO-3</issue>
            </serinfo>
            <pubinfo>
              <pubplace>Portland, Oregon</pubplace>
              <publish>Oregon Department of Geology and Mineral Industries</publish>
            </pubinfo>
            <othercit>McClaughry, J.D., Niewendorp, C.A., Franczyk, J. J., Duda, C. J. M., and Madin, I. P., 2020, Mineral Information Layer for Oregon, release 3 [MILO-3]: Oregon Department of Geology and Mineral Industries Digital Data Series MILO-3, Esri geodatabase. Superseded by DOGAMI MILO, release 4.</othercit>
            <onlink>https://pubs.oregon.gov/dogami/dds/p-MILO-3.htm</onlink>
          </citeinfo>
        </srccite>
        <typesrc>online</typesrc>
        <srctime>
          <timeinfo>
            <sngdate>
              <caldate>2020</caldate>
            </sngdate>
          </timeinfo>
          <srccurr>publication</srccurr>
        </srctime>
        <srccitea>MILO3</srccitea>
      </srcinfo>
      <srcinfo>
        <srccite>
          <citeinfo>
            <origin>Clark A. Niewendorp and Ronald P. Geitgey</origin>
            <pubdate>2010</pubdate>
            <title>Mineral Information Layer for Oregon-Release 2</title>
            <edition>Release 2</edition>
            <geoform>vector digital data</geoform>
            <serinfo>
              <sername>Oregon Department of Geology and Mineral Industries Digital Data</sername>
              <issue>MILO-2</issue>
            </serinfo>
            <pubinfo>
              <pubplace>Portland, Oregon </pubplace>
              <publish>Oregon Department of Geology and Mineral Industries</publish>
            </pubinfo>
            <othercit>Niewendorp, C.A., and Geitgey, R.P., 2010, Mineral information layer for Oregon, release 2 [MILO-2], GIS files. Superseded by DOGAMI MILO, release 4.</othercit>
            <onlink>https://www.oregongeology.org/pubs/dds/p-MILO-2.htm</onlink>
          </citeinfo>
        </srccite>
        <typesrc>online</typesrc>
        <srctime>
          <timeinfo>
            <sngdate>
              <caldate>2010</caldate>
            </sngdate>
          </timeinfo>
          <srccurr>publication</srccurr>
        </srctime>
        <srccitea>MILO2</srccitea>
      </srcinfo>
      <srcinfo>
        <srccite>
          <citeinfo>
            <origin>Jerry J. Gray (deceased)</origin>
            <pubdate>1993</pubdate>
            <title>Mineral Information Layer for Oregon by County</title>
            <edition>MILOC93</edition>
            <geoform>tabular digital data</geoform>
            <serinfo>
              <sername>Oregon Department of Geology and Mineral Industries Open-File Report</sername>
              <issue>O-93-08</issue>
            </serinfo>
            <pubinfo>
              <pubplace>Portland, Oregon</pubplace>
              <publish>Oregon Department of Geology and Mineral Industries</publish>
            </pubinfo>
            <othercit>Gray, J.J., 1993, Mineral Information Layer for Oregon by County: Oregon Department of Geology and Mineral Industries Open-File Report O-93-08, 18 p.</othercit>
          </citeinfo>
        </srccite>
        <srcscale>100000</srcscale>
        <typesrc>CD-ROM</typesrc>
        <srctime>
          <timeinfo>
            <sngdate>
              <caldate>1993</caldate>
            </sngdate>
          </timeinfo>
          <srccurr>publication</srccurr>
        </srctime>
        <srccitea>MILOC93</srccitea>
      </srcinfo>
      <srcinfo>
        <srccite>
          <citeinfo>
            <origin>U.S. Bureau of Mines</origin>
            <pubdate>1995</pubdate>
            <title>Spatial data extracted from the Minerals Availability System/Mineral Industry Location System (MAS/MILS)</title>
            <geoform>tabular digital data</geoform>
            <serinfo>
              <sername>Special Publication</sername>
              <issue>12-95</issue>
            </serinfo>
            <pubinfo>
              <publish>U.S. Bureau of Mines</publish>
            </pubinfo>
          </citeinfo>
        </srccite>
        <typesrc>online</typesrc>
        <srctime>
          <timeinfo>
            <sngdate>
              <caldate>1995</caldate>
            </sngdate>
          </timeinfo>
          <srccurr>publication</srccurr>
        </srctime>
        <srccitea>USBM</srccitea>
      </srcinfo>
      <procstep>
        <procdesc>The predecessor and foundation for the Mineral Information Layer for Oregon (MILO) was a 1991 database version referred to as the Mineral Information Layer for Oregon by County (MILOC; Gray, 1991, 1993). MILOC was originally created in dBASE III+ format, within which was information for location, commodity, and other data for a 7,899 mineral occurrences, prospects, and mines statewide. MILOC was later converted to a GIS format and renamed MILO-1 (i.e., MILO-Release 1). The GIS-based MILO-1 database was not released to the public.
Release 2 (MILO-2) was published in 2010 MILO-2 and listed 21,101 mineral occurrences, prospects, and mines (Niewendorp and Geitgey, 2010). The substantial increase in sites displayed in MILO-2 was chiefly the result of data extracted from several sources: The U.S. Geological Survey (USGS) Mineral Resources Data System (MRDS), Computerized Resources Information Bank (CRIB), and U.S. Bureau of Mines' Mineral Industry Location Subsystem (MILS) main frame databases that resulted in the addition of approximately 700 records; Two unpublished data sets from the Oregon Department of Transportation (ODOT). These datasets listed aggregate sources and quality tests for ~2,000 sites not originally compiled in MILOC/MILO-1; and Mining-related marks/symbols (e.g., aggregate site[s], borrow pits, quarries, gravel pits, and mine/prospect site[s]) from the ~ 1,866 USGS 1:24,000-scale 7.5-minute topographic quadrangle maps covering Oregon.  Visual inspection and heads-up digitizing of topographic quadrangle maps added nearly 9,000 sites to MILO-2. Release 3 (MILO-3) moved the legacy MILO databases to a format consistent with the U.S. Geological Survey Geologic Map Schema (GeMS). The MILO-3 geodatabase also spatially linked scanned historical large-format maps (1,954 Adobe Portable Document Format [PDF] files) and mining records and reports (4,637 Adobe PDFs) with specific mine sites. The mining data itself and linked map documents are available on a searchable and filterable web map hosted on the DOGAMI website (https://www.oregon.gov/dogami/milo/Pages/ohmi.aspx) as well as a map service. MILO-4 lists 24,664 mineral occurrences, prospects, and mines; 1,348 points have been added beyond the 23,316 locations shown in MILO-3. The notable increase in sites is chiefly the result of data extracted from the following sources: Mining-related marks/symbols from version 3.0 of the USGS_TopoMinesSymbols_24k_Points; Visual inspection and heads-up digitizing of high-resolution 3-m lidar imagery for abandoned mine land features  in and around the North Santiam, Quartzville, Blue River, and Bohemia mining districts in the Oregon Cascades; and United State Geological Survey Mineral Resource Data System, MRDS-fUS41 dataset. A new feature class named Assay Returns, includes 15,405 individual scanned analytical records as PDF files, houses analytical results obtained from DOGAMIs in-house fire assay, chemical, and spectrograph laboratories between 1937 and 1985. </procdesc>
        <srcused>MILO3; MILO2; MILOC93; USBM</srcused>
        <proccont>
          <cntinfo>
            <cntorgp>
              <cntorg>Oregon Department of Geology and Mineral Industries</cntorg>
            </cntorgp>
            <cntaddr>
              <addrtype>mailing and physical address</addrtype>
              <address>800 NE Oregon Street Suite 965</address>
              <city>Portland</city>
              <state>Oregon</state>
              <postal>97232</postal>
              <country>USA</country>
            </cntaddr>
            <cntvoice>1 971 673 1555</cntvoice>
            <cntfax>1 971 673 1562</cntfax>
            <cntemail>dogami-info@dogami.oregon.gov</cntemail>
            <cntinst>When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from https://www.oregon.gov/dogami/pages/default.aspx</cntinst>
          </cntinfo>
        </proccont>
      </procstep>
    </lineage>
  </dataqual>
  <spdoinfo>
    <direct>Vector</direct>
  </spdoinfo>
  <spref>
    <horizsys>
      <planar>
        <mapproj>
          <mapprojn>NAD_1983_HARN_Oregon_Statewide_Lambert_Feet_Intl</mapprojn>
          <lambertc>
            <stdparll>43.0</stdparll>
            <stdparll>45.5</stdparll>
            <feast>1312335.958005249</feast>
          </lambertc>
        </mapproj>
        <planci>
          <plandu>Foot</plandu>
        </planci>
      </planar>
      <geodetic>
        <horizdn>D North American 1983 HARN</horizdn>
        <ellips>GRS 1980</ellips>
        <semiaxis>6378137.0</semiaxis>
        <denflat>298.257222101</denflat>
      </geodetic>
    </horizsys>
  </spref>
  <eainfo>
    <detailed>
      <enttyp>
        <enttypl>MILO</enttypl>
      </enttyp>
      <attr>
        <attrlabl>Commodity</attrlabl>
        <attrdef>All commodities listed in the literature for this site</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Type</attrlabl>
        <attrdef>Commodity Type</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>CommodityAbbreviation</attrlabl>
        <attrdef>Commodity Abbreviation</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ODOTID</attrlabl>
        <attrdef>A unique identifier which references records of information pertaining to an ODOT owned aggregate pit/quarry or private source</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>USGSID</attrlabl>
        <attrdef>A unique identifier which references records of information pertaining to a mineral property </attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>MLRRID</attrlabl>
        <attrdef>The permit or site number from the Oregon Department of Geology and Mineral Industries, Mineral Land Regulation and Reclamation program. This is the unique record number</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>SiteName</attrlabl>
        <attrdef>The name of the mineral deposit or mining operation</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Synonym</attrlabl>
        <attrdef>Other names that the site has had over time, or in the case of placers, names of other gravel bars along a river segment for which one location was chosen for the site name</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Owner</attrlabl>
        <attrdef>Name of individual, company, or operator identified with operation</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>County</attrlabl>
        <attrdef>County in Oregon where the site is found, single county entry</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>MiningDistrict</attrlabl>
        <attrdef>Mining district the county mine record was assigned. Some districts are formal, but most are informal.</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Location</attrlabl>
        <attrdef>Physical address or referenced to topographic point or feature</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>PLSSSectionFraction</attrlabl>
        <attrdef>The letters or single letter that follow the subdivision of township, range, and section system</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Section</attrlabl>
        <attrdef>Section number; su= section unknown</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Township</attrlabl>
        <attrdef>Township number and direction (N-S)</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Range</attrlabl>
        <attrdef>Range number and Range character (E-W)</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Latitude</attrlabl>
        <attrdef>Latitude in decimal degree or Y coordinate for center point of each point</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Longitude</attrlabl>
        <attrdef>Longitude in decimal degree or X coordinate for center point of each point</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>TopoMap24k</attrlabl>
        <attrdef>U.S. Geological Survey 1:24,000-scale (24K) topographic map in Oregon where site is located</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>TopoMap100k</attrlabl>
        <attrdef>U.S. Geological Survey 1:100,000-scale (100K) topographic map in Oregon where the site is located</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ElevationFeet</attrlabl>
        <attrdef>Point of reference in feet. the elevation of the site</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>CommoditiesProduced</attrlabl>
        <attrdef>Commodities produced and sold or used</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ProductSize</attrlabl>
        <attrdef>A broad characterization of the magnitude of production at the site. Two different categorizations were used, a three-fold set based on magnitude (Small, Medium, Large) and a simple indicator (Yes or No), with some records showing Undete for unknown.</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ProductInformation</attrlabl>
        <attrdef>Production information</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>OreMaterial</attrlabl>
        <attrdef>Ore material (valuable minerals or mineral material)</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>DepositType</attrlabl>
        <attrdef>General type of deposit or resource present at the site</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>WorkingsType</attrlabl>
        <attrdef>Type of workings</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>WorkingsDescription</attrlabl>
        <attrdef>Description of exploration and/or mine workings as described from source data</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>YearOfDiscovery</attrlabl>
        <attrdef>Year the mineral discovery was made</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>YearProductionStarted</attrlabl>
        <attrdef>Year that mineral production started</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>FullReference1</attrlabl>
        <attrdef>Reference #1</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ShortReference1</attrlabl>
        <attrdef>Publication Series Information</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Pages1</attrlabl>
        <attrdef>Page number of reference where site is mentioned or described</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>FullReference2</attrlabl>
        <attrdef>Reference #2</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ShortReference2</attrlabl>
        <attrdef>Publication Series Information</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Pages2</attrlabl>
        <attrdef>Page number of reference where site is mentioned or described</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>FullReference3</attrlabl>
        <attrdef>Reference #3</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ShortReference3</attrlabl>
        <attrdef>Publication Series Information</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Pages3</attrlabl>
        <attrdef>Page number of reference where site is mentioned or described</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>FullReference4</attrlabl>
        <attrdef>Reference #4</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ShortReference4</attrlabl>
        <attrdef>Publication Series Information</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Pages4</attrlabl>
        <attrdef>Page number of reference where site is mentioned or described</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>FullReference5</attrlabl>
        <attrdef>Reference #5</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ShortReference5</attrlabl>
        <attrdef>Publication Series Information</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>Pages5</attrlabl>
        <attrdef>Page number of reference where site is mentioned or described</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>DataSourceID</attrlabl>
        <attrdef>Data source identification foreign key to geologic map. Full citations can be found in the Oregon Geologic Data Compilation. Unique code for each original reference map, expressed as the first 4 letters of the first author's last name, first and middle initials, the year of publication, and occasionally a map identifier </attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>MapUnit</attrlabl>
        <attrdef>Reference map unit label symbol taken from the original geologic reference map found in the Oregon Geologic Data Compilation</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>MapUnitName</attrlabl>
        <attrdef>Reference map unit name taken from the map legend or explanation of map units on the original geologic reference map found in the Oregon Geologic Data Compilation</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ThematicUnitLabel</attrlabl>
        <attrdef>Previously known as the Geologic Merge Unit Label. Label (period delimited) assigned by area geologists that combines all the original map units into 7 different general geologic categories found in the Oregon Geologic Data Compilation</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ThematicRockType</attrlabl>
        <attrdef>General geologic rock type of the geologic merge unit label, expressed by the genesis of the unit found in the Oregon Geologic Data Compilation</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ThematicAge</attrlabl>
        <attrdef>Age of geologic merge unit based on the Geologic Time Scale found in the Oregon Geologic Data Compilation</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ThematicTerraneGroup</attrlabl>
        <attrdef>Stratigraphic name (formally or informally named) for the terrane or group found in the Oregon Geologic Data Compilation</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ThematicFormation</attrlabl>
        <attrdef>Stratigraphic name (formally or informally named) for the geologic formation found in the Oregon Geologic Data Compilation</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ThematicMember</attrlabl>
        <attrdef>Stratigraphic name (formally or informally named) for the member type found in the Oregon Geologic Data Compilation</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ThematicUnit</attrlabl>
        <attrdef>Stratigraphic name (formally or informally named) for the unit type found in the Oregon Geologic Data Compilation</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ThematicLithology</attrlabl>
        <attrdef>Characteristic lithology type name for the geologic merge unit label found in the Oregon Geologic Data Compilation</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>ArcJoinID</attrlabl>
        <attrdef>Concatenation of 'DataSourceID' and 'MapUnit' fields without a space in between - for use with joins or relates of data tables in ArcGIS or other GIS software found in the Oregon Geologic Data Compilation</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
      <attr>
        <attrlabl>MILO_ID</attrlabl>
        <attrdef>Primary key. Values = ID_1, ID_2, ID_3, etc. Values must be unique to the database</attrdef>
        <attrdefs>Oregon Department of Geology and Mineral Industries</attrdefs>
      </attr>
    </detailed>
    <overview>
      <eaover>This feature class shows mineral-related information for the following commodities: metals (elements, metallic, and oxides), industrial minerals (non-metallic minerals and materials, including gemstones), mineral fuel (coal and oil shale), and aggregate (sand and gravel and stone). MILO contains 24,664 mineral occurrences, prospects, and mines in Oregon.</eaover>
    </overview>
  </eainfo>
  <distinfo>
    <distrib>
      <cntinfo>
        <cntorgp>
          <cntorg>Oregon Department of Geology and Mineral Industries</cntorg>
        </cntorgp>
        <cntaddr>
          <addrtype>mailing and physical address</addrtype>
          <address>800 NE Oregon Street Suite 965</address>
          <city>Portland</city>
          <state>Oregon</state>
          <postal>97232</postal>
          <country>USA</country>
        </cntaddr>
        <cntvoice>1 971 673 1555</cntvoice>
        <cntfax>1 971 673 1562</cntfax>
        <cntemail>dogami-info@dogami.oregon.gov</cntemail>
        <cntinst>When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from https://www.oregon.gov/dogami/pages/default.aspx</cntinst>
      </cntinfo>
    </distrib>
    <distliab>Although these data have been processed successfully on a computer system at the Oregon Department of Geology and Mineral Industries, no warranty expressed or implied is made by DOGAMI regarding the utility of the data on any other system, nor shall the act of distribution constitute any such warranty.</distliab>
    <stdorder>
      <digform>
        <digtinfo>
          <formname>"GDB" Esri File Geodatabase</formname>
        </digtinfo>
      </digform>
    </stdorder>
    <availabl>
      <timeinfo>
        <sngdate>
          <caldate>08/01/1991-08/31/2024</caldate>
        </sngdate>
      </timeinfo>
    </availabl>
  </distinfo>
  <metainfo>
    <metd>2024-08-31 00:00:00</metd>
    <metc>
      <cntinfo>
        <cntorgp>
          <cntorg>Oregon Department of Geology and Mineral Industries</cntorg>
        </cntorgp>
        <cntaddr>
          <addrtype>mailing and physical address</addrtype>
          <address>800 NE Oregon Street Suite 965</address>
          <city>Portland</city>
          <state>Oregon</state>
          <postal>97232</postal>
          <country>USA</country>
        </cntaddr>
        <cntvoice>1 971 673 1555</cntvoice>
        <cntfax>1 971 673 1562</cntfax>
        <cntemail>dogami-info@dogami.oregon.gov</cntemail>
        <cntinst>When contacting DOGAMI about this data set, please reference the data set title or other identifying information in your correspondence. DOGAMI publications can be downloaded from https://www.oregon.gov/dogami/pages/default.aspx</cntinst>
      </cntinfo>
    </metc>
    <metstdn>Oregon Department of Geology and Mineral Industries Metadata Standard</metstdn>
    <metstdv>1.4</metstdv>
    <metac>None</metac>
    <metuc>None</metuc>
    <metsi>
      <metscs>None</metscs>
      <metsc>None</metsc>
      <metshd>None</metshd>
    </metsi>
  </metainfo>
</metadata>
