Identification_Information: Citation: Citation_Information: Originator: Robert B. Scott Originator: David J. Lidke Originator: Daniel J. Grunwald Publication_Date: 2002 Title: Geologic Map of the Vail West quadrangle, Eagle County, Colorado Edition: 1.0 Geospatial_Data_Presentation_Form: map Series_Information: Series_Name: Miscellaneous Field Studies Issue_Identification: MF-2369 Publication_Information: Publication_Place: Denver, Colorado Publisher: U.S. Geological Survey Online_Linkage: http://geology.cr.usgs.gov/pub/mf-maps/mf-2369/ Description: Abstract: This new 1:24,000-scale geologic map of the Vail West 7.5' quadrangle, as part of the USGS Western Colorado I-70 Corridor Cooperative Geologic Mapping Project, provides new interpretations of the stratigraphy, structure, and geologic hazards in the area on the southwest flank of the Gore Range. Bedrock strata include Miocene tuffaceous sedimentary rocks, Mesozoic and upper Paleozoic sedimentary rocks, and undivided Early(?) Proterozoic metasedimentary and igneous rocks. Tuffaceous rocks are found in fault-tilted blocks. Only small outliers of the Dakota Sandstone, Morrison Formation, Entrada Sandstone, and Chinle Formation exist above the redbeds of the Permian-Pennsylvanian Maroon Formation and Pennsylvanian Minturn Formation, which were derived during erosion of the Ancestral Front Range east of the Gore fault zone. In the southwestern area of the map, the proximal Minturn facies change to distal Eagle Valley Formation and the Eagle Valley Evaporite basin facies. The Jacque Mountain Limestone Member, previously defined as the top of the Minturn Formation, cannot be traced to the facies change to the southwest. Abundant surficial deposits include Pinedale and Bull Lake Tills, periglacial deposits, earth-flow deposits, common diamicton deposits, common Quaternary landslide deposits, and an extensive, possibly late Pliocene landslide deposit. Landscaping has so extensively modified the land surface in the town of Vail that a modified land-surface unit was created to represent the surface unit. Laramide movement renewed activity along the Gore fault zone, producing a series of northwest-trending open anticlines and synclines in Paleozoic and Mesozoic strata, parallel to the trend of the fault zone. Tertiary down-to-the-northeast normal faults are evident and are parallel to similar faults in both the Gore Range and the Blue River valley to the northeast; presumably these are related to extensional deformation that occurred during formation of the northern end of the Rio Grande rift system in Colorado. In the southwestern part of the map area, a diapiric(?) exposure of the Eagle Valley Evaporite exists and chaotic faults and folds suggest extensive dissolution and collapse of overlying bedrock, indicating the presence of a geologic hazard. Quaternary landslides are common and indicate that landslide hazards are widespread in the area, particularly where old slide deposits are disturbed by construction. The late Pliocene(?) landslide that consists largely of a smectitic upper Morrison Formation matrix and boulders of Dakota Sandstone is readily reactivated. Debris flows are likely to invade low-standing areas within the towns of Vail and West Vail where tributaries of Gore Creek issue from the mountains on the north side of the valley. Purpose: This map was funded by and is a product of the National Cooperative Geologic Mapping Program. This corridor is experiencing rapid urban growth. Geologic mapping is needed to aid in land development planning in order to address, avoid, or mitigate known and potential geologic hazards. Supplemental_Information: >DATASETS INCLUDED IN THIS GEOSPATIAL DATABASE: > vwpoly: geologic polygons, contacts, faults, marker beds, and intra-unit scarps > vwline: fold axes, concealed linear features, limits of abundant chert fragments in the Maroon Formation, and cross-section lines > vwpoint: bedding and foliation attitudes, and miscellaneous point data Time_Period_of_Content: Time_Period_Information: Single_Date/Time: Calendar_Date: 2002 Currentness_Reference: Publication date Status: Progress: Complete Maintenance_and_Update_Frequency: None planned Spatial_Domain: Bounding_Coordinates: West_Bounding_Coordinate: -106.5 East_Bounding_Coordinate: -106.375 North_Bounding_Coordinate: 39.75 South_Bounding_Coordinate: 39.625 Keywords: Theme: Theme_Keyword_Thesaurus: Glossary of Geology, American Geologic Institute Theme_Keyword: Pennsylvanian-Permian Theme_Keyword: Maroon Formation Theme_Keyword: glacial till Theme_Keyword: colluvium Theme_Keyword: landslide Place: Place_Keyword_Thesaurus: U.S. Board on Geographic Names (BGN) Geographic Names Information System (GNIS) Place_Keyword: United States Place_Keyword: Colorado Place_Keyword: Eagle County Place_Keyword: Vail Place_Keyword: West Vail Access_Constraints: None Use_Constraints: None. Acknowledgment of the U.S. Geological Survey would be appreciated in products derived from these data. Point_of_Contact: Contact_Information: Contact_Person_Primary: Contact_Person: Robert B. Scott Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: Box 25046, Denver Federal Center, MS 913 City: Denver State_or_Province: Colorado Postal_Code: 80225-0046 Contact_Voice_Telephone: (303) 236-1230 Contact_Electronic_Mail_Address: rbscott@usgs.gov Data_Set_Credit: Dave Lidke and Bruce Bryant contributed to the geologic mapping of the Vail West quadrangle. Digital cartography by Daniel Grunwald. Native_Data_Set_Environment: SunOS, 5.7, sun4d UNIX ARC/INFO version 8.0.2 Browse_Graphic: Browse_Graphic_File_Name: Browse_Graphic_File_Description: graphic representation of map layout Browse_Graphic_File_Type: PDF Data_Quality_Information: Attribute_Accuracy: Attribute_Accuracy_Report: Data were entered and checked by the geologist who made the observations. The attributes of this geospatial dataset consist of text identifiers and numeric codes that indicate the identity of the geologic unit or type of geologic feature, and determine how each feature is colored or symbolized. To check attribute accuracy, a color check plot was visually compared to the geologist's original compilation. Discrepancies between the digital geospatial dataset and the original analog compilation were corrected as needed. Machine-created listings of unique attribute values were used to identify spelling errors or other inconsistencies, and corrections were made as needed. This map has been thoroughly reviewed for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. Logical_Consistency_Report: Map elements were visually checked by the author for overshoots, undershoots, duplicate features, polygon attributes, and other errors. Automated (ARC/INFO) 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 other geologists for consistency with basic geologic principles and general conformity to USGS mapping standards. Completeness_Report: Only features that could be accurately compiled at the 1:24,000 scale were included. All geospatial database elements are attributed. Positional_Accuracy: Horizontal_Positional_Accuracy: Horizontal_Positional_Accuracy_Report: Linework was compiled at 1:24,000 scale. Accuracies are assumed to be less than a pen width, equivalent to approximately 25 m at the compilation scale. Lineage: Process_Step: Process_Description: Linework produced in digital format in ARC/INFO, created on-screen from an image of the source mylar compilation with an effective resolution of 400 dpi. Process_Date: 2000 Process_Step: Process_Description: Geologic data were reviewed for completeness and correctness by geologists. Process_Date: 2000 Process_Step: Process_Description: Spatial data and metadata were reviewed for completeness and correctness. Process_Date: 2001 Process_Step: Process_Description: Geologic data and metadata were edited for conformance with USGS geologic map standards, geologic names usage, and editorial policy. Process_Date: 2001 Process_Step: Process_Description: Editing corrections applied to geospatial data. Process_Date: 2001 Process_Step: Process_Description: Map layout created for printing. Geospatial datasets compiled for distribution. Process_Date: 2002 Spatial_Data_Organization_Information: Direct_Spatial_Reference_Method: Vector Spatial_Reference_Information: Horizontal_Coordinate_System_Definition: Planar: Map_Projection: Map_Projection_Name: Polyconic Polyconic: Longitude_of_Central_Meridian: -106.4375 Latitude_of_Projection_Origin: 36.625 False_Easting: 0.0 False_Northing: 0.0 Planar_Coordinate_Information: Planar_Coordinate_Encoding_Method: coordinate pair Coordinate_Representation: Abscissa_Resolution: 10 Ordinate_Resolution: 10 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: >========================================== >COVERAGE: vwpoly >========================================== > >------------------------------------------ >USER DEFINED ITEMS IN VWPOLY.PAT: >------------------------------------------ > >ITEM NAME WIDTH TYPE DESCRIPTION > >DESCRIPTION 50 C geologic unit name >SYMBOL 6 I marker symbol number for plotting >LABEL 4 C unit label for map plots (for example, "Qal") > >ITEM VALUES AND RELATION OF ITEMS "DESCRIPTION", "LABEL", AND "SYMBOL" > DESCRIPTION LABEL SYMBOL > water 56 > artificial fill af 8 > modified land-surface deposit mls 76 > alluvium Qal 2 > younger terrace alluvium Qty 23 > older terrace alluvium Qto 111 > younger fan alluvium and debris-flow deposits Qfy 32 > older fan alluvium and debris-flow deposits Qfo 51 > younger diamicton Qdi 29 > older diamicton QTdi 53 > colluvium, undivided Qc 12 > landslide deposits Qls 16 > earth-flow deposit Qef 28 > older colluvium QTc 130 > Pinedale Till Qtp 62 > Pinedale Till, uncertain Qtp? 62 > Bull Lake Till Qtb 56 > Bull Lake Till, uncertain Qtb? 56 > till, undivided Qti 101 > periglacial deposits Qpg 444 > outwash of periglacial deposits and Pinedale Till Qo 49 > boulder-field deposits Qbf 79 > wetland deposits Qw 429 > tufa deposits Qtu 20 > tuffaceous sedimentary rocks Tst 50 > Dakota Sandstone Kd 454 > Morrison Formation Jm 427 > Entrada Sandstone Je 365 > Chinle Formation @c 510 > Maroon Fm., limestone bed ls 45 > Maroon Formation P&m 320 > Eagle Valley Formation &ev 231 > Eagle Valley Evaporite &ee 241 > Minturn Fm., limestone bed ls 45 > Minturn Formation &m 239 > Minturn Fm., Jacque Mountain Limestone Member &mj 305 > Minturn Fm., White Quail Limestone Member &mwq 379 > Minturn Fm., Robinson Limestone Member &mr 349 > Minturn Fm., Robinson Limestone Member, uncertain &mr? 349 > Minturn Fm., dolomite bed &md 333 > Minturn Fm., dolomite bed, uncertain &md? 333 > Cross Creek Granite Xc 514 > migmatite Xm 500 > > In the "LABEL" item, the @ and & refer to the Triassic and > Pennsylvanian symbols, respectively > >------------------------------------------ >USER DEFINED ITEMS IN VWPOLY.AAT: >------------------------------------------ > >ITEM NAME WIDTH TYPE DESCRIPTION > >DESCRIPTION 80 C geologic or hydrologic feature (for example, contact or shoreline) >ROCKUNIT 40 C geologic unit name for thin beds represented by lines (if applicable) >SYMBOL 3 I marker symbol number for plotting > >ITEM VALUES AND RELATION OF ITEMS "DESCRIPTION" AND "SYMBOL" >DESRIPTION SYMBOL >Map boundary 50 >contact, approximately located 2 >contact, certain 1 >contact, landslide scarp, certain 15 >contact, surficial unit deposited against fault scarp, inferred 57 >high-angle reverse fault, inferred 72 >landslide scarp, certain 15 >normal fault, approximately located 51 >normal fault, certain 50 >normal fault, inferred 183 >normal fault, inferred, queried 183 >shoreline 0 >thin subunit, approximately located 52 >thin subunit, certain 50 > >ITEM VALUES FOR "ROCKUNIT" > >Eagle Valley Evaporite, limestone bed >Jacque Mountain Limestone Member >Maroon Fm., dolomite bed >Maroon Fm., limestone bed >Minturn Fm., limestone bed >Robinson Limestone Member >Robinson Limestone Member, uncertain >White Quail Limestone Member > > >========================================== >COVERAGE:vwline >========================================== > >------------------------------------------ >USER DEFINED ITEMS IN VWLINE.AAT: >------------------------------------------ > >ITEM NAME WIDTH TYPE DESCRIPTION > >DESCRIPTION 30 C geologic feature (for example, fold axis) >SYMBOL 3 I marker symbol number for plotting > >ITEM VALUES AND RELATION OF ITEMS "DESCRIPTION" AND "SYMBOL" > >anticline, certain 60 >anticline, concealed 63 >anticline, inferred 61 >high-angle reverse fault, concealed 74 >limit of abundant chert in Maroon Fm 4 >line of cross-section 210 >normal fault, concealed 184 >syncline, certain 92 >syncline, concealed 95 >syncline, inferred 93 > > >========================================== >COVERAGE:vwpoint >========================================== > >------------------------------------------ >USER DEFINED ITEMS IN VWPOINT.PAT: >------------------------------------------ > >ITEM NAME WIDTH TYPE DESCRIPTION > >AZIMUTH 3 I strike of planar feature or azimuth of linear feature >INCLINATION 3 I dip of planar feature >DESCRIPTION 31 C geologic or cultural feature (for example, foliation) >SYMBOLCODE 3 I marker symbol number for plotting > >ITEM VALUES FOR "AZIMUTH" >integer values from 0-359 > >ITEM VALUES FOR "INCLINATION" >integer values from 0-89 > >ITEM VALUES AND RELATION OF ITEMS "DESCRIPTION" AND "SYMBOLCODE" > >adit 103 >outcrop, ash 241 >prospect pit 53 >strike and dip of foliation 81 >strike and dip of inclined beds 2 (or 1 if inclination=0) > Entity_and_Attribute_Detail_Citation: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Address: Address_Type: mailing address Address: Central Publications Group Address: MS 902, Box 25046, DFC City: Denver State_or_Province: CO Postal_Code: 80225-0046 Contact_Voice_Telephone: 303-236-5486 Contact_Electronic_Mail_Address: webmaster@geology.cr.usgs.gov Distribution_Liability: Although these digital spatial data have been subjected to rigorous review and are substantially complete, they are released on the condition that neither the USGS nor the United States Government may be held liable for any damages resulting from their authorized or unauthorized use. Standard_Order_Process: Digital_Form: Digital_Transfer_Information: Format_Name: ARCE, SHP Format_Version_Number: ArcInfo version 8.0.2 File_Decompression_Technique: .tar.gz - UNIX gzip-compressed TAR file - use GNU zip and TAR to extract .ZIP - Windows ZIP archive - use Winzip, PKZip, or similar to extract Digital_Transfer_Option: Online_Option: Computer_Contact_Information: Network_Address: Network_Resource_Name: Fees: none Distribution_Information: Distributor: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S.Geological Survey Contact_Address: Address_Type: mailing address Address: USGS Information Services Address: Box 25286 City: Denver State_or_Province: CO Postal_Code: 80225 Country: United States Contact_Voice_Telephone: 1-888-ASK-USGS Resource_Description: MF-2369 (Map-on-Demand) Distribution_Liability: none Standard_Order_Process: Non-digital_Form: Available as one printed sheet plus one pamphlet. Order from USGS at the address listed above or see http://rmmcweb.cr.usgs.gov/pub/mod/order.html for more ordering information. Fees: for current prices please see http://rmmcweb.cr.usgs.gov/public/mod/order.html Metadata_Reference_Information: Metadata_Date: 20020104 Metadata_Contact: Contact_Information: Contact_Organization_Primary: Contact_Organization: U.S. Geological Survey Contact_Person: Robert B. Scott Contact_Address: Address_Type: mailing address Address: Box 25046, Denver Federal Center, MS 913 City: Denver State_or_Province: Colorado Postal_Code: 80225-0046 Contact_Voice_Telephone: (303) 236-1230 Contact_Electronic_Mail_Address: rbscott@usgs.gov Metadata_Standard_Name: FGDC Content Standards for Digital Geospatial Metadata Metadata_Standard_Version: FGDC-STD-001-1998