20240307 11080200 1.0 FALSE MapUnitOverlayPolys2021 002 -366394.712700 380257.703300 60041.319300 383084.606700 1 Projected GCS_NAD_1983_2011 Linear Unit: Meter (1.000000) NAD_1983_2011_Virginia_Lambert <ProjectedCoordinateSystem xsi:type='typens:ProjectedCoordinateSystem' xmlns:xsi='http://www.w3.org/2001/XMLSchema-instance' xmlns:xs='http://www.w3.org/2001/XMLSchema' xmlns:typens='http://www.esri.com/schemas/ArcGIS/3.1.0'><WKT>PROJCS[&quot;NAD_1983_2011_Virginia_Lambert&quot;,GEOGCS[&quot;GCS_NAD_1983_2011&quot;,DATUM[&quot;D_NAD_1983_2011&quot;,SPHEROID[&quot;GRS_1980&quot;,6378137.0,298.257222101]],PRIMEM[&quot;Greenwich&quot;,0.0],UNIT[&quot;Degree&quot;,0.0174532925199433]],PROJECTION[&quot;Lambert_Conformal_Conic&quot;],PARAMETER[&quot;False_Easting&quot;,0.0],PARAMETER[&quot;False_Northing&quot;,0.0],PARAMETER[&quot;Central_Meridian&quot;,-79.5],PARAMETER[&quot;Standard_Parallel_1&quot;,37.0],PARAMETER[&quot;Standard_Parallel_2&quot;,39.5],PARAMETER[&quot;Latitude_Of_Origin&quot;,36.0],UNIT[&quot;Meter&quot;,1.0],AUTHORITY[&quot;EPSG&quot;,6591]]</WKT><XOrigin>-37232800</XOrigin><YOrigin>-28884600</YOrigin><XYScale>10000</XYScale><ZOrigin>-100000</ZOrigin><ZScale>10000</ZScale><MOrigin>0</MOrigin><MScale>1</MScale><XYTolerance>0.001</XYTolerance><ZTolerance>0.001</ZTolerance><MTolerance>0.001</MTolerance><HighPrecision>true</HighPrecision><WKID>6591</WKID><LatestWKID>6591</LatestWKID></ProjectedCoordinateSystem> 20240307 16200600 20240307 16200600 Anne Carter Witt Virginia Department of Energy, Geology and Mineral Resources Program Geologist 434-951-6319 900 Natural Resources Drive, Suite 500 Charlottesville VA 22903 anne.witt@energy.virginia.gov 20211127 ArcGIS Metadata 1.0 Enterprise Geodatabase Feature Class Feature class MapUnitOverlayPolys, part of Statewide Geologic Map Database of Virginia: Virginia Department of Energy, Geology and Mineral Resources Program, Open-file Report 2021-12, scale 1:250,000. 2021-11-30 1.0 Witt, A.C., Heller, M.J., Occhi, M.E., Spears, D.B., Lang, K.E., Berquist, C.R. Jr., and Prince, P.S., editors Virginia Department of Energy Virginia vector digital data This digital map database represents the general distribution of surficial and bedrock geologic units mapped in the Commonwealth of Virginia and compiled at a nominal scale of 1:250,000. New and modified geologic contacts were digitized on screen by geologists at approximately 1:24,000 from maps that ranged from 1:24,000 to 1:250,000-scale. The database delineates map units that are identified by general age and lithology, generally following the stratigraphic nomenclature of the U.S. Geological Survey (USGS). This metadata report provides an overview of the data content of this GeMS geodatabase and associated files. This digital map database represents an update to the contact lines, geologic map units, and map unit descriptions found on the 1993 Geologic Map of Virginia and is intended to show the generalized geology of the state. The database also provides surficial geologic units derived from 10-meter LIDAR and new geologic mapping (where available) as a separate feature class. It is recommended that users not use the data beyond the recommended scale range of 1:100,000. Users requiring more detailed geologic mapping should refer to the original geologic map citation found the "DataSources" field of the various feature classes and non-spatial tables. This digital database was prepared and edited by Witt, A.C., Heller, M.J., Occhi, M.E., Spears, D.B., Lang, K.E., Berquist, C.R. Jr. and Prince, P.S. Anne Carter Witt Virginia Department of Energy, Geology and Mineral Resources Program Geologist 434-951-6319 900 Natural Resources Drive, Suite 500 Charlottesville VA 22903 anne.witt@energy.virginia.gov Blue Ridge Appalachian Plateau Valley and Ridge Piedmont Virginia Coastal Plain geoscientificInformation ISO 19115 Topic Category geologic geologic contacts geologic mapping surficial geologic units geologic maps geomorphology surficial geologic maps geological map geologic faulting geologic formations geoscientificInformation geologic geologic contacts geologic mapping surficial geologic units geologic maps geomorphology surficial geologic maps geological map geologic faulting geologic formations Blue Ridge Appalachian Plateau Valley and Ridge Piedmont Virginia Coastal Plain This dataset is not precise beyond 1:100,000-scale and is not for use at scales larger than 1:100,000. Any derivative products utilizing these datasets shall clearly indicate their source. If users modify the data in any way they are obligated to describe the types of modifications they have performed. User specifically agrees not to misrepresent these datasets, nor to imply that changes they made were approved by the Virginia Department of Energy. The Virginia Department of Energy (Virginia Energy) provides these geographic data "as is." Virginia Energy makes no guarantee or warranty concerning the accuracy of information contained in the geographic data. Virginia Energy further makes no warranties, either expressed or implied as to any other matter whatsoever, including, without limitation, the condition of the product, or its fitness for any particular purpose. The burden for determining fitness for use lies entirely with the user. Although these data have been processed successfully on computers at Virginia Energy, no warranty, expressed or implied, is made by Virginia Energy regarding the use of these data on any other system, nor does the fact of distribution constitute or imply any such warranty. In no event shall Virginia Energy have any liability whatsoever for payment of any consequential, incidental, indirect, special, or tort damages of any kind, including, but not limited to, any loss of profits arising out of use of or reliance on the geographic data or arising out of delivery, installation, operation, or support by Virginia Energy. Esri ArcGIS 10.5 (Build 6491) Service Pack N/A (Build N/A) true -83.6754 -75.1664 39.466 36.5409 0.000000 0.000000 publication date 1993-01-01 2021-11-30 0.000000 0.000000 Feature class MapUnitOverlayPolys is part of VAStateGeologicMap.gdb, a composite dataset that conforms to "GeMS (Geologic Map Schema)--a standard format for the digital publication of geologic maps", available at http://ngmdb.usgs.gov/Info/standards/GeMS/. 1 -83.753869 -75.085421 39.451637 36.462345 The accuracy of the geologic data varies depending on the compiled map. In general, contact lines were digitized on screen at 1:24,000-scale. The accuracy of the line work (and generated map unit polygons) is reflected in the LocationConfidenceMeters field in the ContactsAndFaults feature class. Surficial units were interpreted primarily using 10-meter LIDAR or from geologic maps, if available. All line work (bedrock and surficial) was given a corresponding data source citation, identifying the original map source for the line work or the geologist who made the contact line interpretation. Database topology, geometric, and logical errors were identified and fixed iteratively using the "Check Topology" tool and the "Validate Database" tool in the ArcGIS GeMS Database Toolbox (available at https://github.com/usgs/gems-tools-arcmap). The geologic bedrock data and geologic descriptions include information from published geologic maps up to 2021 and is considered to be an update to the geologic map line work originally compiled in 1993. Surficial data was digitized from 10-meter LIDAR flown between 2010 and 2019. Only surficial features that were large enough to identify at 1:24,000-scale were added to MapUnitOverlayPolys. A personal geodatabase of the 1993 map (including contacts and map unit polygons) was imported to a GeMS format geodatabase. Original geologic map descriptions from the 1993 Expanded Explanation were copied from a Word document into the DescriptionOfMapUnits table. Citations were added from the Expanded Explanation into the DataSources table. This data was then loaded onto an ArcSDE server so that multiple editors could update and edit geologic contacts. 2019-01-01 Geologic contact lines were used to build geologic map unit polygons using the ArcGIS Feature to Polygon tool. A temporary annotation feature class was used to label the map unit polygons and symbolize (color) them. 2021-01-01 Geologic contacts where compiled and updated by geologists from various map sources. Geologists digitized contacts at a nominal scale of 1:24,000. Edge match issues were resolved by the individual geologist. Citations for the source for individual contact lines were added to the DataSources table. Surficial units were also digitized and added to the MapUnitOverlayPolys feature class. 2021-01-01 The GeMS ArcToolbox was used to validate the database, update metadata, and automate field completion. 2021-01-01 Map unit descriptions were updated for each geologic unit using the best available geologic data in an Excel spreadsheet. Citations are provided in the DataSources table and fields. Colors were chosen for each map unit. These colors were then used to symbolize the map units built in Step 3. 2021-01-01 7811 withheld Polygons that delineate underlying material, overlying material, or some other aspect of earth materials that is described in table DescriptionOfMapUnits, e.g., dike swarm, colluvium. On a map graphic, such polygons are commonly shown by a patterned overprint. GeMS Feature Class 7811 OBJECTID Internal feature number. Esri Unrepresentable domain. Shape The geometry data type. ESRI Unrepresentable domain. MapUnit Short plain-text identifier of the map unit. Foreign key to DescriptionOfMapUnits table. GeMS af artificial fill this report, table DescriptionOfMapUnits cb Carolina Bay this report, table DescriptionOfMapUnits al alluvium this report, table DescriptionOfMapUnits Qbc Bacons Castle Formation this report, table DescriptionOfMapUnits psg Pliocene sand and gravel this report, table DescriptionOfMapUnits Water Water this report, table DescriptionOfMapUnits Kp Potomac Formation this report, table DescriptionOfMapUnits cv colluvium this report, table DescriptionOfMapUnits ls landslide this report, table DescriptionOfMapUnits Tch Cold Harbor Formation this report, table DescriptionOfMapUnits msg Miocene sand and gravel this report, table DescriptionOfMapUnits td terrace deposits, undifferentiated this report, table DescriptionOfMapUnits Tc Chesapeake Group this report, table DescriptionOfMapUnits fn colluvial fan this report, table DescriptionOfMapUnits IdentityConfidence Confidence that feature is correctly identified. GeMS certain Identity of a feature can be determined using relevant observations and scientific judgment; therefore, one can be reasonably confident in the credibility of this interpretation. U.S. Geological Survey National Cooperative Geologic Mapping Program, 2020, GeMS (Geologic Map Schema)—A standard format for the digital publication of geologic maps: U.S. Geological Survey Techniques and Methods, book 11, chap. B10, 74 p. Label Plain-text equivalent of the desired annotation for a feature: for example "14 Ma", or "^c" which (when used with the FGDC GeoAge font) results in the geologic map-unit label TRc (with TR run together to make the Triassic symbol). GeMS Unrepresentable domain. Symbol Reference to a point marker, line symbol, or area-fill symbol that is used on the map graphic to denote the feature: perhaps a star for a K-Ar age locality, or a heavy black line for a fault. GeMS Unrepresentable domain. DataSourceID Source of data; foreign key to table DataSources. GeMS DAS712 Virginia Division of Mineral Resources, 2003, Digital representation of the 1993 geologic map of Virginia: Virginia Division of Mineral Resources, Publication 174, scale 1:500,000. this report, table DataSources DAS785 Mangum, H.E., editor, 2021, Geologic map database of the Roanoke 30- x 60-minute quadrangle: Virginia Department of Energy, Geology and Mineral Resources Program, Open-file Report 2021-11, 1:100,000-scale database. this report, table DataSources DAS434 Mixon, R.B., Berquist, C.R., Jr., Newell, W.L., Johnson, G.H., Powars, D.S., Schindler, J.S., and Rader, E.K., 1989, Geologic map and generalized cross section of the Coastal Plain and adjacent parts of the Piedmont, Virginia: U.S. Geological Survey Miscellaneous Investigation Series Map I-2033. this report, table DataSources DAS576 Spears, A.V., Mills, C.M., Cunningham, V.F., Bailey, C.M., and Frier, W.P., 2015, Geology of the Howardsville 7.5-minute quadrangle, Virginia, 1:24,000-scale geologic map this report, table DataSources DAS457 Occhi, M.E., Blanchette, J.S., and Berquist, C.R. Jr., 2017, Geologic map of the Chester quadrangle, Virginia: Virginia Division of Geology and Mineral Resources, Open-File Report 17-02, 1:24,000-scale geologic map. this report, table DataSources DAS639 Weems, R.E., 1981, Geology of the Hanover Academy quadrangle, Virginia: Virginia Division of Mineral Resources Publication 30, map with text. this report, table DataSources DAS784 Walker, T.J., editor, 2021, Geologic map database of the Virginia portion of the Pikeville and Williamson 30- x 60-minute quadrangles: Virginia Department of Energy, Geology and Mineral Resources Program, Open-file Report 2021-10,1:100,000-scale database. this report, table DataSources DAS109 Carter, M.W., 2010, Geologic map of the Glen Allen quadrangle, Virginia: Virginia Department of Mines, Minerals and Energy, Division of Geology and Mineral Resources, Open-File Report 10-07, Map Scale 1:24,000. this report, table DataSources DAS781 Williams, L.A., Swanger, W.R., and Steinbauer, J.K., editors, 2021, Geologic map database of the Virginia portion of the Bluefield and Beckley 30- x 60-minute quadrangles: Virginia Department of Energy, Geology and Mineral Resources Program, Open-file Report 2021-07,1:100,000-scale database. this report, table DataSources DAS679 Mixon, R.B., Pavlides, L., Powars, D.S., Froelich, A.J., Weems, R.E., Schindler, J.S., Newell, W.L., Edwards, L.E., and Ward, L.W., 2000, Geologic Map of the Fredericksburg 30’ x 60’ Quadrangle, Virginia and Maryland: U.S. Geological Survey Geologic Investigation Series Map I-2607, scale 1:24,000. this report, table DataSources DAS729 Heller, M.J., Swanger, W.R., Rubinstein, J., Smith, M.S., 2019, Geologic map of a portion of the Hiwassee Quadrangle, Virginia: Virginia Division of Geology and Mineral Resources, Open-File Report 19-08, 1:24,000-scale geologic map. this report, table DataSources DAS694 Southworth, C.S., Brezinski, D.K., Drake, A.A., Jr., Burton, W.C., Orndorff, R.C., Froelich, A.J., Reddy, J.E., Denenny, D., and Daniels, D.L., 2007, Geologic map of the Frederick 30' x 60' quadrangle, Maryland, Virginia, and West Virginia: U.S. Geological Survey Scientific Investigations Map 2889, 1:100,000-scale map. this report, table DataSources DAS289 Heller, M.J., Biebuyck, A.J., and Swanger, W.R., 2017, Geologic map of the Oriskany quadrangle, Virginia: Virginia Division of Geology and Mineral Resources, Open-File Report 17-03, 1:24,000-scale geologic map. Heller, M.J., Biebuyck, A.J., and Swanger, W.R., 2017, Geologic map of the Oriskany quadrangle, Virginia: Virginia Division of Geology and Mineral Resources, Open-File Report 17-03, 1:24,000-scale geologic map. this report, table DataSources DAS497 Prince, P.S., Occhi, M.E., and Heller, M.J., 2018, Geologic map of the Hallsboro quadrangle, Virginia: Virginia Division of Geology and Mineral Resources Open-File Report 2018-05. Hallsboro quadrangle, Virginia: Virginia Division of Geology and Mineral Resources Open-File Report 2018-05. this report, table DataSources DAS496 Prince, P.S. and Henika, W.S., 2017, Geologic Map of the Catawba quadrangle, Virginia: Virginia Division of Geology and Mineral Resources Publication 187, 1:24,000-scale geologic map. this report, table DataSources DAS217 Evans, N.H. and Farrar, S., 2015, Geologic map of the Perkinsville quadrangle, Virginia: Virginia Division of Geology and Mineral Resources Open File Report 15-03, 1:24,000-scale geologic map. this report, table DataSources DAS681 Heller, M.J. interpreted linework this report, table DataSources DAS256 Gilmer, A.K. and Berquist C.R., Jr., 2011, Geologic map of the Providence Forge quadrangle, Virginia: Virginia Division of Geology and Mineral Resources Open File Report 11-7, 1:24,000-scale geologic map. this report, table DataSources DAS110 Carter, M.W., Berquist, C.R., Jr., Bondurant, A.K., and Bleick, H.A., 2007, Geology of the Bon Air Quadrangle, Virginia: Virginia Division of Geology and Mineral Resources, 1:24,000-scale map. this report, table DataSources DAS111 Carter, M.W., Bondurant, A.K., and Berquist, C.R., Jr., 2010, Geologic map of the Chesterfield quadrangle, Virginia: Virginia Department of Mines, Minerals and Energy, Division of Geology and Mineral Resources Open-File Report 10-06, 1:24,000-scale geologic map. this report, table DataSources DAS680 Occhi, M.E. interpreted linework this report, table DataSources DAS050 Occhi, M.E., Berquist, C.R., Latane, V.M., Blanchette, J.M., 2018, Geologic map of the Petersburg National Battlefield and adjacent areas: Virginia Division of Geology and Mineral Resources, Open-File Report 18-09, 1:24,000-scale geologic map. this report, table DataSources DAS684 Witt, A.C. interpreted linework this report, table DataSources DAS717 Spears, D.B. and Occhi, M.E., 2020, Geologic map of the Midlothian quadrangle, Virginia: Virginia Division of Geology and Mineral Resources Open-file Report 2020-05, 1:24,000-scale map. this report, table DataSources DAS686 U.S. Geological Survey, 2012, National Hydrography Dataset Best Resolution (NHD). Available online: https://www.usgs.gov/core-science-systems/ngp/national-hydrography this report, table DataSources DAS687 Berquist, C.R. Jr. interpreted linework this report, table DataSources DAS734 Occhi, M.E., 2020, Geologic map of the west half of the Hopewell Quadrangle: Virginia Division of Geology and Mineral Resources, Open-File Report 2020-03, 1:24,000-scale geologic map. this report, table DataSources DAS695 Heller, M.J. and Smith, M.S., Geologic map of the Peaks of Otter quadrangle, Virginia: Virginia Division of Geology and Mineral Resources Open-file Report 2018-07, 1:24,000-scale map. this report, table DataSources DAS682 Spears, D.B. interpreted linework this report, table DataSources DAS683 Prince, P.S. interpreted linework this report, table DataSources DAS524 Reilly, J.M., 1980, A geologic and potential field investigation of the Central Virginia Piedmont [M.S. thesis]: Virginia Polytechnic Institute and State University, Blacksburg, 111 p. this report, table DataSources DAS711 Evans, N.H., 2019, Geologic map of the Goochland quadrangle, Virginia: Virginia Division of Geology and Mineral Resources Open-file Report 2019-07, 1:24,000-scale map. this report, table DataSources DAS728 Occhi, M.E., Swanger, W.R., 2019, Geologic map of the Beach Quadrangle: Virginia Division of Geology and Mineral Resources, Open-File Report 19-05, 1:24,000-scale geologic map. this report, table DataSources DAS701 Lyttle, P.T., Aleinikoff, J.N. Burton, W.C., Crider, E.A., Jr., Drake, A.A., Jr., Froelich, A.J., Horton, J.W., Kasselas, G., Mixon, R.B., McCartan, L. Nelson, A.E., Newell, W.L., Pavlides, L., Powars, D.S., Southworth, C.S. and Weems, R.E., 2017, Geologic map of the Washington West 30' x 60' quadrangle, Maryland, Virginia and Washington, D.C., U.S. Geological Survey Open-file Report 2017-1142, 1:100,000-scale map. this report, table DataSources Notes Additional information specific to a particular feature or table entry. GeMS Unrepresentable domain. Free text. Values of <null> or #null indicate no entry. MapUnitOverlayPolys_ID Primary key. GeMS Arbitrary string. Values should be unique within this database. created_user An ArcGIS-generated editor tracking field. GeMS ESRI created_date An ArcGIS-generated editor tracking field. GeMS ESRI last_edited_user An ArcGIS-generated editor tracking field. GeMS ESRI last_edited_date An ArcGIS-generated editor tracking field. GeMS ESRI RuleID Indicates the corresponding symbology rule in Cartographic Representations. For each feature class, values of either the Symbol attribute or the RuleID attribute should be non-null. GeMS ESRI Override Indicates exceptions to the corresponding symbology rule in Cartographic Representations. GeMS ESRI Shape.STArea() Shape.STArea() Double 0 0 0 Shape.STLength() Shape.STLength() Double 0 0 0 dataset EPSG 8.2.10(10.3.1) Simple FALSE 7811 TRUE FALSE