Roy Sando Joanna Thamke 20140101 Raster and Vector Digital Data Set Scientific Investigations Report 2014-5047 Reston, Virginia U.S. Geological Survey https://doi.org/10.5066/P14X4XX2 Joanna N. Thamke Gary D. LeCain Derek W. Ryter Roy Sando Andrew J. Long 20140612 report Scientific Investigations Report 2014-5047 Reston, Virginia U.S. Geological Survey http://dx.doi.org/10.3133/sir20145047 These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. Note that this data release has been modified from its original version. This data release was originally published on the U.S. Geological Survey (USGS) Water Mission Area NSDI Node (Node) in 2014. The Node has since been deprecated, and in 2023, the data release was revised and the files were moved to Sciencebase, which is a USGS trusted digital repository. In 2023, when this migration of files to Sciencebase occurred, each unit extent and surface file for the Upper Cretaceous and Lower Tertiary aquifer systems was given its own landing page and citation. In 2025, the 2023 version of these data release were modified further. In the 2025 version, the extents, surfaces, and metadata files were consolidated into a main Sciencebase page, three child pages, and one citation. The 2025 Sciencebase’s main landing page contains a shapefile with the extents of the Upper Cretaceous and Lower Tertiary aquifer systems and the southern boundary of deposits of Quaternary age in the Williston and Powder River Structural Basins area. A child page was created for the Upper Cretaceous aquifer, Lower Tertiary aquifer, and the deposits of Quaternary age detailed in the associated publication (SIR2014_5047). The child pages for the Upper Cretaceous and Lower Tertiary aquifer systems provide the extents, thicknesses, and top altitude surfaces of the two aquifers and their subunits. The child page for the deposits of Quaternary age in the glaciated part of the Williston and Powder River Structural Basins area provide the extent and thickness of the deposits. A new master metadata file was compiled for each child page to document all the datasets. Raster datasets of thickness and top altitude are presented in two formats: ASCII and TIFF, in feet. The 2025 version of the data release was created to make the associated spatial data more accessible to the user and to simplify the ScienceBase catalog. This data release child item provides extents and digital surfaces containing the top altitude and thickness of the Lower Tertiary aquifer and its subunits (Lower Fort Union, Middle Fort Union, Upper Fort Union) for the Williston and Powder River structural basins in Montana, South Dakota, North Dakota, Wyoming, and parts of Canada. The shapefiles of potentiometric surface contours and rasters of horizontal hydraulic conductivity, which were developed as part of the original publication (Thamke and others, 2014), are not included in this data release but are available for download from http://dx.doi.org/10.3133/sir20145047. The abbreviations used in the data set names are listed below: Structural basins: 1. WB - Williston Basin 2. PRB - Powder River Basin Aquifer names: 1. LTRTRY - Lower Tertiary Aquifer 2. UPCTCS - Upper Cretaceous Aquifer Deposits of Quaternary age files: QTRNRY - Deposits of Quaternary age Data category: 1. Extents – polygon extent of aquifer or subunit 2. Thick – unit thickness 3. TopAlt – altitude of top surface of unit For each child item, files were organized by data category (extent, thickness, or top altitude) and compressed into a zip archive. Zip archives were named by the principal aquifer or Quaternary abbreviation and then by the data category for example LTRTRY_TopAlt.zip contains the top altitude raster surfaces for the Lower Tertiary Aquifer. The following is a list of Digital Object Identifiers (DOI), for the 2023 versions of the data sets. These DOI have been deprecated and superseded by this data release's DOI (doi:10.5066/P14X4XX2): doi:10.5066/P9IDDOQ1, doi:10.5066/P9IILS7S, doi:10.5066/P946VBV2, doi:10.5066/P9VM11PC, doi:10.5066/P92WNH4Z, doi:10.5066/P90O39NP, doi:10.5066/P9AU0US7, doi:10.5066/P95BLCXN, doi:10.5066/P9Y8751J, doi:10.5066/P9B5X3OK, doi:10.5066/P9A2NSK0, doi:10.5066/P9N9KZPO, doi:10.5066/P943JURD, doi:10.5066/P9XCCQK0, doi:10.5066/P9YT4LP1, doi:10.5066/P9O89YZM, doi:10.5066/P91ZYX07, doi:10.5066/P9UWVV9G, doi:10.5066/P9TMK1OR, doi:10.5066/P9T8PTLS, doi:10.5066/P9Q47D2U, doi:10.5066/P9G6MD3G, doi:10.5066/P92B4REF, doi:10.5066/P92MPNQX, doi:10.5066/P9R6XM7V, doi:10.5066/P9DGQ3VZ, doi:10.5066/P9WPATN3, doi:10.5066/P9XZZG9E, doi:10.5066/P97A695Z, doi:10.5066/P9XJN3D6, doi:10.5066/P9F1W7PD, doi:10.5066/P9B5HEAK, doi:10.5066/P914U0YY. These data were compiled and created as part of the groundwater availability study of the Upper Cretaceous and lower Tertiary geohydrologic units in the Williston and Powder River structural basins. These data are intended for regional use and may not be as accurate at local or point scales. The files listed below are supplemental to the USGS SIR SIR 2014–5047 titled “Hydrogeologic Framework of the Uppermost Principal Aquifer Systems in the Williston and Powder River Structural Basins, United States and Canada” and should not be used without an understanding of what the files represent. The methods used to derive the data contained in these files, can be found in the “Methods” section of SIR 2014–5047. 2014 publication date Complete None planned -108.0116 -99.6594 49.5414 42.6917 ISO 19115 Topic Category geoscientificInformation inlandWaters environment USGS Thesaurus Williston basin Powder River basin Bedrock geology Groundwater availability Groundwater USGS Metadata Identifier USGS:67bf7991d34e8876fcbfc640 Alexandria Digital Library Feature Type Thesaurus aquifers None Upper Cretaceous aquifer Lower Tertiary aquifer aquifer extent aquifer top altitude aquifer bottom altitude Geographic Names Information System Williston River Powder River United States Canada None. Please see 'Distribution Info' for details. None. Users are advised to read the data set's metadata thoroughly to understand appropriate use and data limitations. Wyoming-Montana Water Science Center Roy Sando Physical Scientist (GIS) mailing address

3162 Bozeman

Helena MT 59601-6456 406-457-5953 406-457-5990 tsando@usgs.gov https://www.sciencebase.gov/catalog/file/get/67bf7991d34e8876fcbfc640?name=LTRTRY_extents.jpg Image of the Lower Tertiary Aquifer System jpg Derek Ryder, Gary LeCain, Julian Heilman, Jennifer Stanton, Andy Long, Jen Bednar, Katherine Aurand, Kyle Davis, Timothy Bartos, Dianne Rauche Environment as of Metadata Creation: Microsoft Windows 7 Version 6.1 (Build 7601) Service Pack 1; ESRI ArcCatalog 10.2 (Build 3497) Service Pack [N/A] (Build [N/A]) The areal extents of the six bedrock hydrogeologic units were simplified and modified from existing digital State and Province geologic maps. The scale of the original data sources ranged from 1:500,000 to 1:1,000,000. Polygons and erratic line segments less than 1.2 miles (mi) [2 kilometers (km)] in length from the existing digital geologic maps were removed for the map in figure 2. Discrepancies in hydrogeologic unit extents at political boundaries were merged by either adjusting extents equally on either side of the political boundary or by using bedrock-surface maps to guide location of unit extents. All of the extents were checked to ensure there were no areas where younger units extended out past older units. Data set is considered complete for the information presented, as described in the abstract. Users are advised to read the rest of the metadata record carefully for additional details. A formal accuracy assessment of the horizontal positional information in the data set has not been conducted. A formal accuracy assessment of the vertical positional information in the data set has either not been conducted, or is not applicable. Klassen, R.W., Wyder, J.E., and Bannatyne, B.B. 1970 Digital and/or Hardcopy Resources Canada Geological Survey of Canada and Manitoba https://doi.org/10.4095/108914 Digital and/or Hardcopy Resources 1970 publication date Klassen, et. al, 1970 Source information used in support of the development of the data set. Soller, D.R., Packard, P.H., and Garrity, C.P. 2012 Digital and/or Hardcopy Resources Reston, VA U.S. Geological Survey https://pubs.usgs.gov/ds/656 Digital and/or Hardcopy Resources 2012 publication date Soller, et. al, 2012 Source information used in support of the development of the data set. Bluemle, J.P. 1983 Digital and/or Hardcopy Resources Bismarck, ND North Dakota Geological Survey https://www.dmr.nd.gov/ndgs/Publication_List/pdf/MIS%20MAPS/MM-25.pdf Digital and/or Hardcopy Resources 1983 publication date ND geology Source information used in support of the development of the data set. Vuke, S.M., Porter, K.W, Lonn, J.D., Lopez, D.A. 2007 Digital and/or Hardcopy Resources Butte, MT Montana Bureau of Mines and Geology https://ngmdb.usgs.gov/Prodesc/proddesc_81651.htm Digital and/or Hardcopy Resources 2007 publication date MT Geology Source information used in support of the development of the data set. Martin, J.E., Sawyer, J.F., Fahrenbach, M.D., Tomhave, D.W., and Schulz, L.D. 2004 Digital and/or Hardcopy Resources Vermillion, SD South Dakota Geological Survey https://ngmdb.usgs.gov/Prodesc/proddesc_72317.htm Digital and/or Hardcopy Resources 2004 publication date SD geology Source information used in support of the development of the data set. Love, J.D., and Christiansen, A.C. 2005 Digital and/or Hardcopy Resources Reston, VA U.S. Geological Survey https://ngmdb.usgs.gov/Prodesc/proddesc_16366.htm Digital and/or Hardcopy Resources 2005 publication date WY geology Source information used in support of the development of the data set. Macdonald, R., and Slimmon, W.L. 1999 Digital and/or Hardcopy Resources Saskatchewan Saskatchewan Geological Survey https://publications.saskatchewan.ca/api/v1/products/111944/formats/125828/download Digital and/or Hardcopy Resources 1999 publication date Saskatchewan geology Source information used in support of the development of the data set. Kume, J., and Hansen, D.E. 1965 Digital and/or Hardcopy Resources Grand Forks, ND North Dakota State Geological Survey https://pubs.usgs.gov/publication/70047673 Digital and/or Hardcopy Resources 1965 publication date Kume and Hansen, 1965 Source information used in support of the development of the data set. Simpson, M.A. 1993 Digital and/or Hardcopy Resources University of Saskatchewan Saskatchewan Research Council Environment and Forestry https://wsask.ca/drinking-water-wastewater/groundwater/mapping/estevan-mapsheet/ Digital and/or Hardcopy Resources 1993 publication date Simpson, 1993 Source information used in support of the development of the data set. Millard, M.J. 1993 Digital and/or Hardcopy Resources University of Saskatchewan Saskatchewan Research Council Environment and Forestry https://wsask.ca/wp-content/uploads/2025/06/Groundwater-Resources-Report-Willow-Bunch-Lake.pdf Digital and/or Hardcopy Resources 1993 publication date Millard, 1993 Source information used in support of the development of the data set. Bluemle, J.P. 1984 Digital and/or Hardcopy Resources Bismarck, ND North Dakota State Geological Survey https://www.swc.nd.gov/info_edu/reports_and_publications/county_groundwater_studies/pdfs/Emmons_Part_I_Plates.pdf Digital and/or Hardcopy Resources 1984 publication date Bluemle, 1984 Source information used in support of the development of the data set. Bluemle, J.P. 1971 Digital and/or Hardcopy Resources Bismarck, ND North Dakota State Geological Survey https://www.swc.nd.gov/info_edu/reports_and_publications/county_groundwater_studies/pdfs/Mclean_Part_I_Plates.pdf Digital and/or Hardcopy Resources 1971 publication date Bluemle, 1971 Source information used in support of the development of the data set. Bluemle, J.P. 1981 Digital and/or Hardcopy Resources Bismarck, ND North Dakota State Geological Survey swc.nd.gov/info_edu/reports_and_publications/county_groundwater_studies/pdfs/Sheridan_Part_III_Plates.pdf Digital and/or Hardcopy Resources 1981 publication date Bluemle, 1981 Source information used in support of the development of the data set. Randich, P.G. 1977 Digital and/or Hardcopy Resources Bismarck, ND North Dakota State Geological Survey https://doi.org/10.3133/ha476 Digital and/or Hardcopy Resources 1977 publication date Randich, 1977 Source information used in support of the development of the data set. Randich, P.G. and Kuzniar, R.L. 1984 Digital and/or Hardcopy Resources Bismarck, ND North Dakota State Geological Survey https://www.swc.nd.gov/info_edu/reports_and_publications/county_groundwater_studies/pdfs/Bottineau_Rolette_Part_III.pdf Digital and/or Hardcopy Resources 1984 publication date Randich and Kuzniar, 1984 Source information used in support of the development of the data set. Armstrong, C.A. 1971 Digital and/or Hardcopy Resources Bismarck, ND North Dakota State Geological Survey https://www.swc.nd.gov/info_edu/reports_and_publications/county_groundwater_studies/pdfs/Burke_Mountrail_Part_III_PLates.pdf Digital and/or Hardcopy Resources 1971 publication date Armstrong, 1971 Source information used in support of the development of the data set. Maathuis, Harm, and Simpson, Mark 2007 Digital and/or Hardcopy Resources University of Saskatchewan Saskatchewan Research Council Environment and Forestry https://wsask.ca/drinking-water-wastewater/groundwater/mapping/cypress-mapsheet-72f/ Digital and/or Hardcopy Resources 2007 publication date Harm and Simpson, 2007 Source information used in support of the development of the data set. Maathuis, Harm, and Simpson, Mark 2007 Digital and/or Hardcopy Resources University of Saskatchewan Saskatchewan Research Council Environment and Forestry https://wsask.ca/wp-content/uploads/2025/06/Groundwater-Resources-Report-Wood-Mountain.pdf Digital and/or Hardcopy Resources 2007 publication date Harm and Simpson, 2007, Wood Mountain Source information used in support of the development of the data set. W.R. Hotchkiss and J.F. Levings 1986 Digital and/or Hardcopy Resources Reston, VA U.S. Geological Survey https://doi.org/10.3133/wri854281 Digital and/or Hardcopy Resources 1986 publication date Hotchkiss and Levings Source information used in support of the development of the data set. Nicolas, M.P.B., Matile, G.L.D., Keller, G.R., and Bamburak, J.D. 2010 Digital and/or Hardcopy Resources Manitoba, Canada Manitoba Geological Survey https://www.manitoba.ca/iem/info/libmin/SM2010-1.zip Digital and/or Hardcopy Resources 2010 publication date Manitoba geology Source information used in support of the development of the data set. Carlson, C.G. 1983 Digital and/or Hardcopy Resources Bismarck, ND North Dakota State Geological Survey https://www.dmr.nd.gov/ndgs/documents/Publication_List/pdf/MisMaps/MM-23.pdf Digital and/or Hardcopy Resources 1983 publication date Carlson, 1983 Source information used in support of the development of the data set. Carlson, C.G. 1983 Digital and/or Hardcopy Resources Helena, MT North Dakota State Geological Survey https://www.dmr.nd.gov/ndgs/documents/Publication_List/pdf/MisMaps/MM-23.pdf Digital and/or Hardcopy Resources 1983 publication date Carlson, 1983 Source information used in support of the development of the data set. Gesch, D.B. 2007 Digital and/or Hardcopy Resources Bethesda, ME American Society for Photgrammetry and Remote Sensing https://www.usgs.gov/the-national-map-data-delivery Digital and/or Hardcopy Resources 2007 publication date NED Source information used in support of the development of the data set. Lewis, B.D., and Hotchkiss, W.R. 1981 Digital and/or Hardcopy Resources Reston, VA U.S. Geological Survey https://doi.org/10.3133/i1317 Digital and/or Hardcopy Resources 1981 publication date Lewis and Hotchkiss Source information used in support of the development of the data set. Bergantino, R.N. 1984 Digital and/or Hardcopy Resources Montana Tech of The University of Montana Montana Bureau of Mines and Geology Digital and/or Hardcopy Resources 1984 publication date Bergantino, 1984 Source information used in support of the development of the data set. For a description on the processing and development of this dataset, see the 'Methods' section of the associated Scientific Investigations Report 2014-5047 (https://pubs.usgs.gov/sir/2014/5047/). 2014 Vector G-polygon 7 LTUC lambert conformal conic (ESRI Full Name: LTUC_lambert_conformal_conic) 33.0 45.0 -104.0 0.0 0.0 0.0 coordinate pair 0.6096 0.6096 meters D_North_American_1983 GRS_1980 6378137.0 298.257222101 LowerFortUnion_Extents_WBandPRB.shp This dataset is a polygon shapefile of the estimated boundary of Lower Fort Union subunit of the Lower Tertiary aquifer in the Williston and Powder River structural basins. This dataset is in the LTRTRY_Extents folder Producer defined Unit Hydrogeologic unit or aquifer Producer defined LFU Lower Fort Union aquifer Producer defined Shape_Length Unknown Producer defined 29709.2173121184 5892655.56974875 Meter Shape_Area Unknown Producer defined 43682953.2621893 209496674893.758 Square Meter RuleID Associated with the appropriate geologic symbology in ArcMap Producer defined 1 1 Override Unknown Producer defined Unknown Data Type MiddleFortUnion_Extents_WBandPRB.shp This dataset is a polygon shapefile of the estimated boundary of Middle Fort Union subunit of the Lower Tertiary aquifer in the Williston and Powder River structural basins. This dataset is in the LTRTRY_Extents folder Producer defined Unit Hydrogeologic unit or aquifer Producer defined MFU Middle Fort Union hydrogeologic unit Producer defined Shape_Length Unknown Producer defined 131207.984035992 6533224.32613036 Meter Shape_Area Unknown Producer defined 175931411.381384 133725555452.842 Square Meter RuleID Associated with the appropriate geologic symbology in ArcMap Producer defined 1 1 Override Unknown Producer defined Unknown Data Type UpperFortUnion_Extents_WBandPRB.shp This dataset is a polygon shapefile of the estimated boundary of Upper Fort Union subunit of the Lower Tertiary aquifer in the Williston and Powder River structural basins. This dataset is in the LTRTRY_Extents folder Producer defined Unit Hydrogeologic unit or aquifer Producer defined UFU Upper Fort Union aquifer Producer defined Shape_Length Unknown Producer defined 43682.2836846652 6563389.85085299 Meter Shape_Area Unknown Producer defined 54326732.2118326 135279807599.207 Square Meter RuleID Associated with the appropriate geologic symbology in ArcMap Producer defined 1 1 Override Unknown Producer defined Unknown Data Type LowerFortUnion_Thick_PRB.tiff and LowerFortUnion_Thick_PRB.txt Raster geospatial data file in ASCII and TIFF format containing thickness values in feet of the Lower Fort Union subunit of the Lower Tertiary aquifer in the Powder River structural basin. This dataset is in the LTRTRY_Thick folder Producer defined Value Thickness of the unit Producer defined 0 2913.2290039063 Feet LowerFortUnion_Thick_WB.tiff and LowerFortUnion_Thick_WB.txt Raster geospatial data file in ASCII and TIFF format containing thickness values in feet of the Lower Fort Union subunit of the Lower Tertiary aquifer in the Williston structural basin. This dataset is in the LTRTRY_Thick folder Producer defined Value Thickness of the unit Producer defined 0 667.85632324219 Feet MiddleFortUnion_Thick_PRB.tiff and MiddleFortUnion_Thick_PRB.txt Raster geospatial data file in ASCII and TIFF format containing thickness values in feet of the Middle Fort Union subunit of the Lower Tertiary aquifer in the Powder River structural basin. This dataset is in the LTRTRY_Thick folder Producer defined Value Thickness of the unit Producer defined 0 3642.5549316406 Feet MiddleFortUnion_Thick_WB.tiff and MiddleFortUnion_Thick_WB.txt Raster geospatial data file in ASCII and TIFF format containing thickness values in feet of the Middle Fort Union subunit of the Lower Tertiary aquifer in the Williston structural basin. This dataset is in the LTRTRY_Thick folder Producer defined Value Thickness of the unit Producer defined 0 520.18658447266 Feet UpperFortUnion_Thick_PRB.tiff and UpperFortUnion_Thick_PRB.txt Raster geospatial data file in ASCII and TIFF format containing thickness values in feet of the Upper Fort Union subunit of the Lower Tertiary aquifer in the Powder River structural basin. This dataset is in the LTRTRY_Thick folder Producer defined Value Thickness of the unit Producer defined 0 4458.4702148438 Feet UpperFortUnion_Thick_WB.tiff and UpperFortUnion_Thick_WB.txt Raster geospatial data file in ASCII and TIFF format containing thickness values in feet of the Upper Fort Union subunit of the Lower Tertiary aquifer in the Williston structural basin. This dataset is in the LTRTRY_Thick folder Producer defined Value Thickness of the unit Producer defined 0 1917.2239990234 Feet LowerFortUnion_TopAlt_PRB.tiff and LowerFortUnion_TopAlt_PRB.txt Raster geospatial data file in ASCII and TIFF format containing altitude values in feet above NAVD88 for the top of the Lower Fort Union subunit of the Lower Tertiary aquifer in the Powder River structural basin. This dataset is in the LTRTRY_TopAlt folder Producer defined Value Altitude of the top of the unit Producer defined -1419.3249511719 6590.1508789063 Feet above NAVD88 LowerFortUnion_TopAlt_WB.tiff and LowerFortUnion_TopAlt_WB.txt Raster geospatial data file in ASCII and TIFF format containing altitude values in feet above NAVD88 for the top of the Lower Fort Union subunit of the Lower Tertiary aquifer in the Williston structural basin. This dataset is in the LTRTRY_TopAlt folder Producer defined Value Altitude of the top of the unit Producer defined 252.47120666504 3876.8369140625 Feet above NAVD88 MiddleFortUnion_TopAlt_PRB.tiff and MiddleFortUnion_TopAlt_PRB.txt Raster geospatial data file in ASCII and TIFF format containing altitude values in feet above NAVD88 for the top of the Middle Fort Union subunit of the Lower Tertiary aquifer in the Powder River structural basin. This dataset is in the LTRTRY_TopAlt folder Producer defined Value Altitude of the top of the unit Producer defined 175.54710388184 6590.1508789063 Feet above NAVD88 MiddleFortUnion_TopAlt_WB.tiff and MiddleFortUnion_TopAlt_WB.txt Raster geospatial data file in ASCII and TIFF format containing altitude values in feet above NAVD88 for the top of the Middle Fort Union subunit of the Lower Tertiary aquifer in the Williston structural basin. This dataset is in the LTRTRY_TopAlt folder Producer defined Value Altitude of the top of the unit Producer defined 954.16778564453 3510.2399902344 Feet above NAVD88 UpperFortUnion_TopAlt_PRB.tiff and UpperFortUnion_TopAlt_PRB.txt Raster geospatial data file in ASCII and TIFF format containing altitude values in feet above NAVD88 for the top of the Upper Fort Union subunit of the Lower Tertiary aquifer in the Powder River structural basin. This dataset is in the LTRTRY_TopAlt folder Producer defined Value Altitude of the top of the unit Producer defined 2752.1708984375 6514.205078125 Feet above NAVD88 UpperFortUnion_TopAlt_WB.tiff and UpperFortUnion_TopAlt_WB.txt Raster geospatial data file in ASCII and TIFF format containing altitude values in feet above NAVD88 for the top of the Upper Fort Union subunit of the Lower Tertiary aquifer in the Williston structural basin. This dataset is in the LTRTRY_TopAlt folder Producer defined Value Altitude of the top of the unit Producer defined 1402.375 3438.5090332031 Feet above NAVD88 The entity and attribute information provided here describes the tabular data associated with the data set. Please review the detailed descriptions that are provided (the individual attribute descriptions) for information on the values that appear as fields/table entries of the data set. The entity and attribute information was generated by the individual and/or agency identified as the originator of the data set. Please review the rest of the metadata record for additional details and information. U.S. Geological Survey GS ScienceBase mailing address

Denver Federal Center, Building 810, Mail Stop 302

Denver CO 80225 United States 1-888-275-8747 sciencebase@usgs.gov Downloadable Data Although this data set has been used by the U.S. Geological Survey, U.S. Department of the Interior, no warranty expressed or implied is made by the U.S. Geological Survey as to the accuracy of the data and related materials. The act of distribution shall not constitute any such warranty, and no responsibility is assumed by the U.S. Geological Survey in the use of this data, software, or related materials. Any use of trade, product, or firm names is for descriptive purposes only and does not imply endorsement by the U.S. Government. Digital Data https://doi.org/10.5066/P14X4XX2 None 20260217 U.S. Geological Survey Water Mission Area mailing

12201 Sunrise Valley Dr

Reston VA 20192 GS-W-model-data@usgs.gov FGDC Content Standards for Digital Geospatial Metadata FGDC-STD-001-1998