Metadata: Identification_Information: Citation: Citation_Information: Originator: David W. Moore Originator: Arthur W. Straub Originator: Margaret E. Berry Originator: Michael L. Baker Originator: Theodore R. Brandt Publication_Date: 2001 Title: Generalized Surficial Geologic Map of the Denver 1°x2° Quadrangle, Colorado Edition: 1.0 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Field Studies Map Issue_Identification: MF-2347 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: http://pubs.usgs.gov/mf/2001/mf-2347/ Description: Abstract: Thirty-nine types of surficial geologic deposits and residual materials of Quaternary age are described and mapped in the greater Denver area, in part of the Front Range, and in the piedmont and plains east of Denver, Boulder, and Castle Rock. Descriptions appear in the pamphlet that accompanies the map. Landslide deposits, colluvium, residuum, alluvium, and other deposits or materials are described in terms of predominant grain size, mineral or rock composition (e.g., gypsiferous, calcareous, granitic, andesitic), thickness of deposits, and other physical characteristics. Origins and ages of the deposits and geologic hazards related to them are noted. Many lines between geologic units on our map were placed by generalizing contacts on published maps. However, in 1997-1999 we mapped new boundaries, as well. The map was projected to the UTM projection. This large map area extends from the Continental Divide near Winter Park and Fairplay ( on the west edge), eastward about 107 mi (172 km); and extends from Boulder on the north edge to Woodland Park at the south edge (68 mi; 109 km). Purpose: The map and descriptions offer information that may be used for: land-use planning (e.g. selecting land fill sites, greenbelts, avoiding geologic hazards), for finding aggregate resources (crushed rock, sand, and gravel), for study of geomorphology and Quaternary geology. Geologic hazards (e.g., landslides, swelling soils, heaving bedrock, and flooding) known to be located in, or characteristic of some mapped units, were identified. Surficial deposits in the quadrangle partially record depositional events of the Quaternary Period (the most recent 1.8 million years). Some events such as floods are familiar to persons living in the area, while other recorded events are pre-historical. The latter include glaciation, probable large earthquakes, protracted drought, and widespread deposition of sand and silt by wind. At least twice in the past 200,000 years (most recently about 30,000 to 12,000 years ago) global cooling caused glaciers to form along the Continental Divide. The glaciers advanced down valleys in the Front Range, deeply eroded the bedrock, and deposited moraines (map units tbg, tbj) and outwash (ggq, gge). On the plains (east part of map), eolian sand (es), stabilized dune sand (ed), and loess (elb) are present and in places contain buried paleosols. These deposits indicate that periods of sand dune deposition alternated with periods of stabilized dunes and soil formation. Supplemental_Information: Compilation scale: 1:250,000. Map is available in digital and print-on-demand paper formats. Deposits are described in terms of predominant grain size, mineralogic and lithologic composition, general thickness, and geologic hazards, if any, relevant geologic historical information and paleosoil information, if any. Thirty- nine map units of deposits include 5 alluvium types, 15 colluvia, 6 residua, 3 types of eolian deposits, 2 periglacial/disintegrated deposits, 3 tills, 2 landslide units, 2 glaciofluvial units, and 1 diamicton. An additional map unit depicts large areas of mostly bare bedrock. The physical properties of the surficial materials were compiled from published soil and geologic maps and reports, our field observations, and from earth science journal articles. Selected deposits in the field were checked for conformity to descriptions of map units by the Quaternary geologist who compiled the surficial geologic map units. FILES INCLUDED IN THIS DATA SET: >denvpoly: polygon coverage containing geologic unit contacts and labels. >denvline: arc coverage containing faults. >geol_sfo.lin: This lineset file defines geologic line types in the > geologically themed coverages. >geoscamp2.mrk: This markerset file defines the geologic markers in the > geologically themed coverages. >color524.shd: This shadeset file defines the cmyk values of colors > assigned to polygons in the geologically themed coverages. Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2001 Currentness_Reference: publication date Status: Progress: Complete Maintenance_and_Update_Frequency: Irregular. No major update is anticipated. Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -106.0 East_Bounding_Coordinate: -104.0 North_Bounding_Coordinate: 40.0 South_Bounding_Coordinate: 39.0 Keywords: Theme: Theme_Keyword_Thesaurus: USGS Thesaurus Theme_Keyword: geomorphology Theme_Keyword: soil sciences Theme_Keyword: geologic maps Theme_Keyword: sedimentary rocks Theme_Keyword: glaciology Theme_Keyword: flooding Theme_Keyword: landslides Theme_Keyword: surficial geologic units Theme_Keyword: geospatial datasets Theme: Theme_Keyword_Thesaurus: ISO 19115 Topic Categories Theme_Keyword: geoscientificInformation Theme: Theme_Keyword_Thesaurus: American Geological Institute (AGI) Glossary of Geology Theme_Keyword: surficial deposits Theme_Keyword: slumping Theme_Keyword: flooding Theme_Keyword: gravel Theme_Keyword: sand Theme_Keyword: glacial deposits Theme_Keyword: till Theme_Keyword: terrace gravel Theme_Keyword: pediment gravel Theme_Keyword: periglacial Theme_Keyword: bedrock Theme_Keyword: placer gold Theme_Keyword: landslide deposit Theme_Keyword: debris-flow deposit Theme_Keyword: Quaternary deposits Theme_Keyword: Holocene Theme_Keyword: eolian sand Theme_Keyword: loess Theme_Keyword: alluvium Theme_Keyword: colluvium Theme_Keyword: Pleistocene Theme_Keyword: land-use planning Theme_Keyword: surficial geology Theme_Keyword: swelling clay Theme_Keyword: expansive clay Theme_Keyword: heaving bedrock Theme_Keyword: erosion Theme_Keyword: soil Place: Place_Keyword_Thesaurus: U.S. Board on Geographic Names (BGN) Geographic Names Information System (GNIS) Place_Keyword: United States of America Place_Keyword: Colorado Place_Keyword: Adams County Place_Keyword: Arapahoe County Place_Keyword: Boulder County Place_Keyword: Clear Creek County Place_Keyword: Denver County Place_Keyword: Douglas County Place_Keyword: Elbert County Place_Keyword: El Paso County Place_Keyword: Grand County Place_Keyword: Jefferson County Place_Keyword: Park County Place_Keyword: Summit County Place_Keyword: Teller County Place_Keyword: Golden Place_Keyword: Denver Place_Keyword: Castle Rock Place_Keyword: Brighton Place_Keyword: Littleton Place_Keyword: Lakewood Place_Keyword: Watkins Place_Keyword: Monument Place_Keyword: Parker Place_Keyword: Front Range Place_Keyword: Southern Rocky Mountains Place_Keyword: Colorado Piedmont Place_Keyword: Great Plains Place: Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4 Place_Keyword: f08001 = Adams Place_Keyword: f08005 = Arapahoe Place_Keyword: f08013 = Boulder Place_Keyword: f08019 = Clear Creek Place_Keyword: f08031 = Denver Place_Keyword: f08035 = Douglas Place_Keyword: f08039 = Elbert Place_Keyword: f08041 = El Paso Place_Keyword: f08049 = Grand Place_Keyword: f08059 = Jefferson Place_Keyword: f08093 = Park Place_Keyword: f08117 = Summit Place_Keyword: f08119 = Teller Access_Constraints: none Use_Constraints: none. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/mf/2001/mf-2347/mf-2347.gif Browse_Graphic_File_Description: Reduced image showing the entire map sheet. 400x203 pixels, 24-bit color. Browse_Graphic_File_Type: GIF Browse_Graphic: Browse_Graphic_File_Name: http://pubs.usgs.gov/mf/2001/mf-2347/mf-2347po.pdf Browse_Graphic_File_Description: The browse graphic file depicts a layout, featuring geologic map and supporting information. The geologic map image is colored, labeled polygons of surficial geologic units and is shown with a scanned image of roads, rivers, political boundaries, place names, and other base map features, all registered to the geologic map. These features are the standard USGS 1:250,000 base map data, including longitude and latitude, numbered UTM (meters), and the Colorado State Coordinate System (feet) grid ticks (21 internal grid tics at 15-minute intervals of longitude and latitude are visible). Supporting information includes a correlation chart of geologic map units, a list of map unit symbols and names, and a small location map that shows the quadrangle location relative to rivers, state boundaries, and locations of 26 published USGS geologic maps (1:250,000 scale) in the Colorado Plateau and western Great Plains. This PDF file is optimized for highest print quality. An accompanying pamphlet includes a complete description of map units, selected references, and a description of terminology used. Browse_Graphic_File_Type: PDF Data_Set_Credit: In 1978, Lucille A. Piety hand drafted a map of surficial geologic units for the Denver quadrangle. She accomplished this by generalizing linework from the published Geologic Map of the Denver 1°x2° quadrangle, north-central Colorado (Bruce Bryant, L.W. McGrew, and R.A. Wobus, 1981, USGS Miscellaneous Investigations Series Map I- 1163). This linework was intended to be reduced as partial input for a more extensive 1:1,000,000-scale map. We digitized these lines initially, edited them to obtain more detail and accuracy, and added data appropriate for a 1:250,000-scale published map. Piety also classified the surficial units. However, because this system was designed for a 1:1,000,000-scale map (less detailed map), we had to make a more detailed classification to replace it. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: David W. Moore Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: PO Box 25046, MS 913, Denver federal Center City: Denver State_or_Province: CO Postal_Code: 80225-0046 Country: USA Contact_Voice_Telephone: (303) 236-1271 Contact_Electronic_Mail_Address: dwmoore@usgs.gov Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: We checked attributes for accuracy by preparing a check plot in which map element colors, patterns, and decorations are determined by the attribute values. The plot was then visually checked against the geologists' original compilations. Polygon closure, compilation, and attribution errors were corrected. Logical_Consistency_Report: Map elements were visually checked for overshoots, undershoots, duplicate features, polygon closures, and other errors. Automated ( ArcInfo AML) routines were also used to check the databases for polygon label errors, line or point attribution errors, sliver polygons, dangling arcs, intersection errors, and projection information. The map was reviewed by two geologists, including another Quaternary specialist for consistency with geologic principles and general conformity to USGS mapping standards. Completeness_Report: Data are complete: no features that could be accurately represented at the compilation scale of 1:250,000 were eliminated. Map units have been generalized from larger or same-scale source maps. Unit properties are described in the accompanying pamphlet. The smallest area expressed in this data set is approximately 62,500 square meters (0.0625 sq. km. or, a square area 250 m on a side). Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Map lines that depict contacts between geologic units were placed by generalizing contacts obtained from published geologic maps, viewing orthophotoquads in USDA county published soil reports, and the authors' field observations. Lines were digitized by using a digitizer tablet having a resolution of 0.001 in. No elevation data exist in the database. No systematic analysis of accuracy was attempted. The best accuracy is that of map lines around boundaries of young channel alluvial deposits, unit asa. They are within 2 mm of their correct map location (within 500 m of actual ground limits) relative to map symbols that depict topography and streams. Perhaps half are within 1 mm of correct map location (250 m of actual ground location). Other map boundaries that represent colluvial, residual, and eolian deposits are less accurately placed because ground limits of these deposits are indefinite, i.e., they grade into one another. Thus, many boundaries on the map (vectorized polygons) are approximate. Another source of inaccuracy is that a material may contain inclusions of surficial materials other than the material depicted by any given map unit. Lineage: Source_Information: Source_Citation: Citation_Information: Originator: Bruce Bryant Originator: L.W. McGrew Originator: R.A. Wobus Title: Geologic Map of the Denver 1°x2° quadrangle, north-central Colorado Publication_Date: 1981 Series_Information: Series_Name: U.S. Geological Survey Miscellaneous Investigations Series Map Issue_Identification: I-1163 Source_Scale_Denominator: 250000 Type_of_Source_Media: paper Source_Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 1978 Source_Currentness_Reference: Date linework was digitized from the map then in press. Source_Citation_Abbreviation: I-1163 Source_Contribution: Initial linework and classificaton Process_Step: Process_Description: In 1978, Lucille A. Piety hand drafted a map of surficial geologic units for the Denver quadrangle. She accomplished this by generalizing linework from the published Geologic Map of the Denver 1°x2° quadrangle, north-central Colorado (Bruce Bryant, L. W. McGrew, and R.A. Wobus, 1981, USGS Miscellaneous Investigations Series Map I-1163). This linework was intended to be reduced as partial input for a more extensive 1:1,000,000- scale map. We digitized these lines initially, edited them to obtain more detail and accuracy, and added data appropriate for a 1:250,000-scale published map. Piety also classified the surficial units. However, because this system was designed for a 1:1,000,000-scale map (less detailed map), we had to make a more detailed classification to replace it. Source_Used_Citation_Abbreviation: I-1163 Process_Date: 1978 Process_Step: Process_Description: The Denver surficial geologic database was digitized from pen- and-ink compilations on scale-stable base material using the GSMCAD public domain program (USGS Open-File Report 96-007). Process_Date: 1999 Process_Step: Process_Description: The digitized linework was edited and revised several times for improved accuracy. Process_Date: 1999 Process_Step: Process_Description: The database was exported to ArcInfo using the GSMCAD export function to create ARC-generated ASCII files and the gsmarc.aml program in ARC to convert the ASCII files to ARC coverages and build polygons. Process_Date: 1999 Process_Step: Process_Description: Coverages were edited and revised in ArcInfo 7.2.1 to reflect editorial changes and to further attribute polygons with descriptions and all features with source information. Process_Date: 2000 Process_Step: Process_Description: External attribute lookup tables for labels and symbols were incorporated into the coverages using the joinitem command. Process_Date: 2000 Process_Step: Process_Description: Final revisions to the digital database were made and a map layout (browse graphic) prepared in Adobe Illustrator. Process_Date: 2000 Process_Step: Process_Description: The digital database was quality checked by the data manager, USGS Central Region Earth Surface Processes team. Process_Date: 2001 Process_Step: Process_Description: Creation of original metadata record Process_Date: 20090727 Process_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: David W. Moore Contact_Address: Address_Type: mailing address Address: U.S. Geological Survey Address: MS 913, Box 25046 Denver Federal Center City: Lakewood State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: (303) 236-1271; (303) 236-1232 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Grid_Coordinate_System: Grid_Coordinate_System_Name: Universal Transverse Mercator Universal_Transverse_Mercator: UTM_Zone_Number: 13 Transverse_Mercator: Scale_Factor_at_Central_Meridian: .9996 Longitude_of_Central_Meridian: -105.0 Latitude_of_Projection_Origin: 0.0 False_Easting: 500000 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 200 Ordinate_Resolution: 200 Planar_Distance_Units: METERS Geodetic_Model: Horizontal_Datum_Name: North American Datum of 1927 Ellipsoid_Name: Clarke 1866 Semi-major_Axis: 6378206.4 Denominator_of_Flattening_Ratio: 294.98 Entity_and_Attribute_Information: Overview_Description: Entity_and_Attribute_Overview: DATABASE STRUCTURE -- ArcInfo and ArcView ========== There are two coverages (root name = denv) and three additional info files. This GIS database includes related look-up tables, which store detailed attribute information. Arc/Info relates for each coverage are saved in a file named .rel. Use the RELATE command with the restore argument at the arc prompt to make the relates active. Alternatively, in Arctools, use the Relate environment: open dialog in the Manage - Relates flyout menu under the Arctools menu to make the relates active. denvpoly coverage: contains all contact lines and labelpoints for each geologic polygon. In the denvpoly.pat INFO file the LABEL item indicates the rock unit label (abbreviation) used to label the unit on the map. The DESC item contains the formal or informal unit name. The SOURCE item contains the numeric code used to identify the data source for the rock unit. The SYMBOL item contains the shadeset symbol number used by ArcInfo to plot a filled/shaded polygon. The symbol numbers in this coverage refer to the color524.shd shadeset. In the coverage's denvpoly.aat INFO file the NAME item contains the name given to the structural feature. The SOURCE item contains the numeric code used to identify the data source for the structural feature. The SYMBOL item contains the lineset symbol number used by ArcInfo to plot a line. The symbol numbers in this coverage refer to the geol_sfo.lin lineset. In the the coverages's denvpoly.ref INFO file the SOURCE item lists the numeric code used to identify the data source. The scale item list the scale of the source map. (This value is the denominator of the proportional fraction that identifies the scale of the map that was digitized or scanned to produce the digital map.) The AUTHORS item lists the author(s) or compiler(s) of source map entered as last name, first name or initial, and middle initial. The YEAR item lists the source (map) publication date. The REFERENCE item lists the remainder of the reference in USGS reference format. The INFO structure of these files is listed below: >DENVPOLY.PAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 AREA 8 18 F 5 > 9 PERIMETER 8 18 F 5 > 17 DENVPOLY# 4 5 B - > 21 DENVPOLY-ID 4 5 B - > 25 SOURCE 4 4 I - > 29 LABEL 10 10 C - > 39 DESC 123 123 C - > 162 SYMBOL 3 3 I - >DENVPOLY.AAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 FNODE# 4 5 B - > 5 TNODE# 4 5 B - > 9 LPOLY# 4 5 B - > 13 RPOLY# 4 5 B - > 17 LENGTH 8 18 F 5 > 25 DENVPOLY# 4 5 B - > 29 DENVPOLY-ID 4 5 B - > 33 NAME 30 30 C - > 63 SOURCE 4 4 I - > 67 SYMBOL 3 3 I - >DENVPOLY.REF: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 SOURCE 4 4 I - > 5 SCALE 8 8 I - > 13 AUTHORS 200 200 C - > 213 YEAR 4 4 I - > 217 REFERENCE 250 250 C - > > Unique values of NAME in DENVPOLY.AAT: contact, neat, water denvline coverage: contains faults. In the denvline.aat INFO file the NAME item indicates the name given to the structural feature. In the the coverages's denvline.ref INFO file the SOURCE item lists the numeric code used to identify the data source. The scale item list the scale of the source map. (This value is the denominator of the proportional fraction that identifies the scale of the map that was digitized or scanned to produce the digital map.) The AUTHORS item lists the author(s) or compiler(s) of source map entered as last name, first name or initial, and middle initial. The YEAR item lists the source (map) publication date. The REFERENCE item lists the remainder of the reference in USGS reference format. The INFO structure of these files is listed below: >DENVLINE.AAT: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 FNODE# 4 5 B - > 5 TNODE# 4 5 B - > 9 LPOLY# 4 5 B - > 13 RPOLY# 4 5 B - > 17 LENGTH 8 18 F 5 > 25 DENVLINE# 4 5 B - > 29 DENVLINE-ID 4 5 B - > 33 NAME 30 30 C - > 63 SOURCE 4 4 I - > 67 SYMBOL 3 3 I - >DENVLINE.REF: > >COLUMN ITEM NAME WIDTH OUTPUT TYPE N.DEC ALTERNATE NAME > 1 SOURCE 4 4 I - > 5 SCALE 8 8 I - > 13 AUTHORS 200 200 C - > 213 YEAR 4 4 I - > 217 REFERENCE 250 250 C - > > Unique values of NAME in DENVLINE.AAT: High-angle reverse fault >Database root name: denv >LABEL AND DESCRIPTION FOR GEOLOGIC UNITS MAPPED >LABEL DESC >afa Alluvial-fan deposit >cac Arkosic loamy colluvium and sheetwash alluvium >cacb Bouldery phase of arkosic loamy colluvium >xch Clayey, calcareous disintegration residuum >dba Crystalline-clast deposits >dbd Mixed-lithology-clast deposits >asa Alluvial sand, silt, clay, and gravel (post-Piney > Creek alluvium, Piney Creek Alluvium,and pre-Piney Creek alluvium >ed Stabilized dune sand >es Eolian sand >jea Slump-block, earthflow, and mudflow landslide deposits >ccd Calcareous clayey colluvium >ccm Andesitic clayey colluvium >caa Andesitic loamy colluvium >clx Clay loam colluvium >csk Grus, crystalline-clast colluvium, rock outcrop, and alluvium >csm Tuffaceous colluvium >cgc Gneiss- and granite-clast gravelly colluvium >cgh Arkose-clast loamy colluvium >cbh Blocky sedimentary-rock colluvium >cbm Carbonate-clast loamy colluvium >cbs Rhyolite- and andesite-clast colluvium >cbu Mixed-lithology blocky colluvium >xlu Feldspathic loamy disintegration residuum >xlv Loamy disintegration residuum, eolian sand, and sheetwash alluvium >xsa Feldspathic quartz-sand disintegration residuum >xgb Latite-clast disintegration residuum >jbc Bouldery crystalline-rock landslide deposit >xsg Feldspathic quartz-sand disintegration residuum >elb Loess (Peoria Formation) >tbg Crystalline-clast bouldery till >tbj Mixed-lithology-clast bouldery till >ggq Outwash sand and gravel (outwash of Bull Lake, Pinedale, and post-Pinedale ages) >ags Alluvial sand, silt, clay and gravel (Louviers and Slocum > Alluviums, undivided; late middle Pleistocene) >tbk Bouldery till (till of pre-Bull Lake glaciations) >gge Outwash sand and gravel (outwash of pre-Bull Lake glaciations) >agm Alluvium gravel and sand (Verdos and Rocky Flats Alluviums, > undivided; early middle Pleistocene and early Pleistocene) >pga Pediment gravel >cra Hogback and rangefront colluvium, alluvium, and rock outcrop complex >QTdd Diamicton >R Bedrock >w Open water Entity_and_Attribute_Detail_Citation: http://pubs.usgs.gov/mf/2001/mf-2347/mf-2347pam.pdf Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: MS 902, Box 25046, Denver Federal Center City: Lakewood State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: (303) 236-5486 Contact_Electronic_Mail_Address: webmaster@greenwood.cr.usgs.gov Resource_Description: MF-2347 Distribution_Liability: Any use of trade names in this publication is for descriptive purposes only and does not imply endorsement by the U.S. Government. Although this digital spatial data has been subjected to rigorous review and is substantially complete, it is released on the condition that neither the USGS nor the United States Government may be held liable for any damages resulting from its authorized or unauthorized use. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE Format_Version_Number: 7.2.1 Format_Information_Content: Surficial geologic units File_Decompression_Technique: gzip -d and tar or unzip Transfer_Size: 0.9 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/mf/2001/mf-2347/mf-2347.tgz Network_Resource_Name: http://pubs.usgs.gov/mf/2001/mf-2347/mf-2347.zip Digital_Form: Digital_Transfer_Information: Format_Name: Shapefile Format_Version_Number: 1.0 Format_Information_Content: Surficial geologic units File_Decompression_Technique: gzip -d and tar or unzip Transfer_Size: 0.9 Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: http://pubs.usgs.gov/mf/2001/mf-2347/mf-2347.tgz Network_Resource_Name: http://pubs.usgs.gov/mf/2001/mf-2347/mf-2347.zip Fees: none Metadata_Reference_Information: Metadata_Date: 20160205 Metadata_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Peter N Schweitzer Contact_Organization: USGS Midwest Area Contact_Position: Collection manager, USGS Geoscience Data Clearinghouse, http://geo-nsdi.er.usgs.gov/ Contact_Address: Address_Type: mailing address Address: Mail Stop 954 12201 Sunrise Valley Dr City: Reston State_or_Province: VA Postal_Code: 20192-0002 Country: USA Contact_Voice_Telephone: 703-648-6533 Contact_Facsimile_Telephone: 703-648-6252 Contact_Electronic_Mail_Address: pschweitzer@usgs.gov Metadata_Standard_Name: Content Standard for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998