Geologic map of the Eagle quadrangle, Eagle County, Colorado

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Metadata:

Identification_Information
Data_Quality_Information
Spatial_Data_Organization_Information
Spatial_Reference_Information
Entity_and_Attribute_Information
Distribution_Information
Metadata_Reference_Information

Identification_Information:

Citation:

Citation_Information:

Originator: David J. Lidke
Publication_Date: 2002
Title: Geologic map of the Eagle quadrangle, Eagle County, Colorado
Edition: 1.0
Geospatial_Data_Presentation_Form: map
Series_Information:

Series_Name: U.S. Geological Survey Miscellaneous Field Studies Map
Issue_Identification: MF-2361

Publication_Information:

Publication_Place: Denver, Colorado
Publisher: U.S. Geological Survey

Online_Linkage: http://pubs.usgs.gov/mf/2002/mf-2361/

Description:

Abstract:

The Eagle quadrangle covers an area that straddles the Eagle River and Interstate 70 (I-70) and it includes the town of Eagle, Colo., which is located in the southwestern part of the quadrangle, just south of I-70 and the Eagle River, about 37 km west of Vail, Colo. The map area is part of the I-70 urban corridor, which is experiencing rapid and escalating urban growth. Geologic mapping along this corridor is needed for ongoing land-use planning. A variety of rocks and deposits characterize the map area and areas nearby. Sedimentary rocks present in the map area range in age from Pennsylvanian rocks, which were deposited in the ancestral Eagle basin during the formation of the ancestral Rocky Mountains, to Late Cretaceous rocks that were deposited just prior to the formation of the present Rocky Mountains. The Pennsylvanian rocks in the map area include a thick sequence of evaporitic rocks (Eagle Valley Evaporite). These evaporitic rocks are commonly complexly folded throughout the southern part of the quadrangle where they are exposed. In general, in the central and northern parts of the quadrangle, the sedimentary rocks overlying the evaporite dip gently to moderately northward. Consequently, the youngest sedimentary rocks (Late Cretaceous rocks) are exposed dipping gently to the north in the northern part of the quadrangle; landslide complexes are widespread along the northerly dipping, dip slopes in shaly rocks of the Cretaceous sequence in the northeastern part of the map area. During the Early Miocene, basaltic volcanism formed extensive basaltic flows that mantled the previously deformed and eroded sedimentary rocks. Erosional remnants of the basaltic flows are preserved in the southeastern, west-central, and north-central parts of the map area. Some of these basaltic flows are faulted and downdropped in a manner that suggests they were downdropped in areas where large volumes of the underlying evaporitic rocks were removed from the subsurface, beneath the basaltic rocks, by dissolution or flowage of the evaporite in the subsurface. Quaternary and late Tertiary(?) surficial deposits in the map area consist mainly of Quaternary alluvium and colluvium, late and middle Pleistocene terrace gravels of the Eagle River, Miocene(?) gravel remnants of the ancestral Eagle River and its tributaries, and Pleistocene to recent mass movement deposits that include landslides and debris flows. Potential geologic hazards in the map area include landslides, debris flows, rockfalls, local flooding, ground subsidence, and expansive and corrosive soils.

Purpose:

This map was funded by the National Cooperative Geologic Program as part of the geologic mapping studies conducted along the I-70 urban corridor. This corridor is experiencing rapid urban growth and geologic mapping is needed to aid in land-use planning in order to address, avoid, and mitigate known and potential geologic hazards.

Supplemental_Information:

Map political location: Eagle County, Colorado Compilation scale: 1:24,000 Geology mapped in 1997.


GEOSPATIAL DATA FILES INCLUDED IN THIS DATA SET:
eaglepy: polygon coverage containing geologic unit contacts and labels.
eagleln: arc coverage containing fold axes and other line entities.
eaglept: point coverage containing bedding attitude measurements and other point entities.
eaglepit: polygon coverage containing gravel pits.

Time_Period_of_Content:

Time_Period_Information:

Single_Date/Time:

Calendar_Date: 2002

Currentness_Reference: publication date

Status:

Progress: Complete
Maintenance_and_Update_Frequency:

Irregular. Production of geologic map products for adjacent quadrangles are in progess and a revised version of this map may eventually be produced.

Spatial_Domain:

Bounding_Coordinates:

West_Bounding_Coordinate: -106.875
East_Bounding_Coordinate: -106.75
North_Bounding_Coordinate: 39.75
South_Bounding_Coordinate: 39.625

Keywords:

Theme:

Theme_Keyword_Thesaurus: USGS Thesaurus
Theme_Keyword: geology
Theme_Keyword: geologic maps
Theme_Keyword: volcanic rocks
Theme_Keyword: sedimentary rocks
Theme_Keyword: geologic structure
Theme_Keyword: bedrock geologic units
Theme_Keyword: landslides

Theme:

Theme_Keyword_Thesaurus: American Geological Institute (AGI) Glossary of Geology
Theme_Keyword: geologic map
Theme_Keyword: basalt
Theme_Keyword: salt
Theme_Keyword: evaporite
Theme_Keyword: landslide

Theme:

Theme_Keyword_Thesaurus: ISO 19115 Topic Categories
Theme_Keyword: geoscientificInformation

Place:

Place_Keyword_Thesaurus:

U.S. Board on Geographic Names (BGN) Geographic Names Information System (GNIS)

Place_Keyword: USA
Place_Keyword: Colorado
Place_Keyword: Eagle County

Place:

Place_Keyword_Thesaurus: Augmented FIPS 10-4 and FIPS 6-4
Place_Keyword: f08037 = Eagle

Stratum:

Stratum_Keyword_Thesaurus: none
Stratum_Keyword: Minturn
Stratum_Keyword: Maroon
Stratum_Keyword: Eagle Valley
Stratum_Keyword: State Bridge
Stratum_Keyword: Chinle
Stratum_Keyword: Entrada
Stratum_Keyword: Morrison
Stratum_Keyword: Dakota
Stratum_Keyword: Benton
Stratum_Keyword: Niobrara

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: David J. Lidke
Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing address
Address: MS 913, Box 25046 DFC
City: Denver
State_or_Province: CO
Postal_Code: 80225-0046

Contact_Voice_Telephone: 303-236-1286
Contact_Electronic_Mail_Address: dlidke@usgs.gov

Browse_Graphic:

Browse_Graphic_File_Name: http://pubs.usgs.gov/mf/2002/mf-2361/mf-2361_map.pdf
Browse_Graphic_File_Description: Printable representation of map layout, 3.9M bytes.
Browse_Graphic_File_Type: PDF

Browse_Graphic:

Browse_Graphic_File_Name: http://pubs.usgs.gov/mf/2002/mf-2361/mf-2361.gif
Browse_Graphic_File_Description:

Reduced-size image of the entire map sheet, 250x212 pixels, 32-bit RGB true color, 29k bytes.

Browse_Graphic_File_Type: GIF

Data_Quality_Information:

Attribute_Accuracy:

Attribute_Accuracy_Report:

Data were entered and checked by the geologist that made the field observations. The attributes of this geospatial data set 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 for overshoots, undershoots, duplicate features, polygon closure, and other errors by the author and by the GIS technician(s) that created the digital database. Automated (ArcInfo) 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. Check plots of the map were reviewed by at least two other geologists for consistency with basic geologic principles and general conformity to U.S. Geological Survey mapping standards.

Completeness_Report:

Data are complete: no features that could be accurately represented at the compilation scale of 1:24,000 were eliminated or generalized. The smallest area represented is approximately 20 square meters. All geospatial database elements are attributed.

Positional_Accuracy:

Horizontal_Positional_Accuracy:

Horizontal_Positional_Accuracy_Report:

Lines were primarily positioned by photointerpretation of 1:24,000-scale color aerial photographs using a PG-2 photogrammetric plotter that rectified the position and transferred it to a base map. Lines were digitized from the base map using a digitizer tablet with resolution of 0.001 inch. Most digitized positions on the map are estimated to have about 20-m horizontal accuracy.

Lineage:

Process_Step:

Process_Description:

Polygons, lines, and points representing geologic features and data points were digitized from scale-stable compilation materials using the GSMCAD public domain program (USGS Open-File Report 96-007).

Process_Date: 1999

Process_Step:

Process_Description:

The map data were exported to ARC/INFO using the GSMCAD export function to create ARC generate ASCII files. The ASCII files were then imported into ArcInfo using the GENERATE routine, and polygon topology built.

Process_Date: 1999

Process_Step:

Process_Description:

The gsmdraw.aml program was used in ARC to produce a graphics file of the colored map. In addition an explanation sheet was produced that includes a correlation of map units diagram, a list of map unit names and corresponding symbols, and an explanation of graphical map symbols.

Process_Date: 1999

Process_Step:

Process_Description:

Text map unit descriptors were added to the .AAT and .PAT database files for each coverage.

Process_Date: 2000

Process_Step:

Process_Description:

Draft check plots of the geologic map and explanation were created and submitted for peer review. Geologists reviewed the plots for conformity with U.S. Geological Survey editorial standards and stratigraphic nomenclature. Revisions were made to the geospatial database as needed.

Process_Date: 2000

Process_Step:

Process_Description:

The database files, metadata, and check plots were edited by the U.S. Geological Survey Central Publications Group, and revisions made to the geospatial database as needed.

Process_Date: 2001

Process_Step:

Process_Description:

The geospatial database files and metadata were quality checked for completeness and consistency.

Process_Date: 2001

Process_Step:

Process_Description:

Final preparation of the geospatial database for distribution, and preparation of map-on-demand files and metadata.

Process_Date: 2002

Process_Step:

Process_Description: Creation of original metadata record
Process_Date: 20020222
Process_Contact:

Contact_Information:

Contact_Person_Primary:

Contact_Person: David J. Lidke
Contact_Organization: U.S. Geological Survey

Contact_Address:

Address_Type: mailing address
Address: MS 913, Box 25046, DFC
City: Denver
State_or_Province: CO
Postal_Code: 80225-0046

Contact_Voice_Telephone: 303-236-1286
Contact_Electronic_Mail_Address: dlidke@usgs.gov

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: -106.8125
Latitude_of_Projection_Origin: 39.625
False_Easting: 0.000
False_Northing: 0.000

Planar_Coordinate_Information:

Planar_Coordinate_Encoding_Method: coordinate pair
Coordinate_Representation:

Abscissa_Resolution: 20
Ordinate_Resolution: 20

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 NAME: eagleln
---------------------------------------------------------------

USER-DEFINED ITEMS IN EAGLELN.AAT:
------------------------------------

ATTRIBUTE NAME: DESCRIPTION
DATABASE ITEM STRUCTURE: 80,80,C,0
DESCRIPTION: type of line entity
ITEM VALUES FOR 'DESCRIPTION':
(see table below)

ATTRIBUTE NAME: SYMBOL
DATABASE ITEM STRUCTURE: 3,3,I,0
DESCRIPTION: line symbol used to draw line entity (geol_sfo.lin and geoscamp1.lin)
ITEM VALUES FOR 'SYMBOL':
(see table below)

Relationship of items 'DESCRIPTION' and 'SYMBOL':

DESCRIPTION                                SYMBOL
---------------------------------------------------
anticline, certain                           60
anticline, concealed                         63
anticline, inferred                          62
cross-section A-A'                          210
cross-section B-B'                          210
plunging anticline, certain                  60
plunging anticline, concealed                63
plunging syncline, certain                   92
plunging syncline, concealed                 95
pressure (buckle) ridge in landslide         85
syncline, certain                            92
syncline, concealed                          95
syncline, inferred                           94

---------------------------------------------------------------
COVERAGE NAME: eaglept
---------------------------------------------------------------

USER-DEFINED ITEMS IN EAGLEPT.PAT:
------------------------------------

ATTRIBUTE NAME: DESCRIPTION
DATABASE ITEM STRUCTURE: 80,80,C,0
DESCRIPTION: type of point entity
ITEM VALUES FOR 'DESCRIPTION':
(see table below)

ATTRIBUTE NAME: AZIMUTH
DATABASE ITEM STRUCTURE: 3,3,I,0
DESCRIPTION: compass orientation of point measurement, if applicable
ITEM VALUES FOR 'AZIMUTH':
integer value in the range 0-359


ATTRIBUTE NAME: INCLINATION
DATABASE ITEM STRUCTURE: 5,5,C,0
DESCRIPTION: inclination from vertical of point measurement, if applicable
ITEM VALUES FOR 'INCLINATION':
values in the range 0-89, or blank where inclination unknown


ATTRIBUTE NAME: SYMBOLCODE
DATABASE ITEM STRUCTURE: 3,3,I,0
DESCRIPTION: markersymbol used to draw point entity (geoscamp1.mrk, geoscamp2.mrk, usgs.mrk, oilgas.mrk)
ITEM VALUES FOR 'SYMBOLCODE':
(see table below)

Relationship of items 'DESCRIPTION' and 'SYMBOLCODE':

DESCRIPTION                                 SYMBOLCODE
-------------------------------------------------------
approximate strike and dip of inclined beds         14
strike and dip of contorted beds                     9
ash deposit                                        241
dry hole                                           101
horizontal bedding                                   1
minor anticline                                    413
strike and dip of inclined beds                      2



---------------------------------------------------------------
COVERAGE NAME: eaglepy
---------------------------------------------------------------

USER-DEFINED ITEMS IN EAGLEPY.PAT:
------------------------------------

ATTRIBUTE NAME: DESCRIPTION
DATABASE ITEM STRUCTURE: 80,80,C,0
DESCRIPTION: description of geologic unit
ITEM VALUES FOR 'DESCRIPTION':
(see table below)

ATTRIBUTE NAME: LABEL
DATABASE ITEM STRUCTURE: 6,6,C,0
DESCRIPTION: geologic unit label
ITEM VALUES FOR 'LABEL':
(see table below)

ATTRIBUTE NAME: SYMBOL
DATABASE ITEM STRUCTURE: 4,4,I,0
DESCRIPTION: shade symbol used to color geologic unit polygon (color524.shd)
ITEM VALUES FOR 'SYMBOL':
(see table below)

Relationship of items 'DESCRIPTION', 'LABEL', and 'SYMBOL':

LABEL   SYMBOL    DESCRIPTION
--------------------------------------------
(none)     313    water
&e         241    Eagle Valley Formation
&ee        243    Eagle Valley Evaporite
@Ps        372    State Bridge Formation
@c         510    Chinle Formation
Je         365    Entrada Sandstone
Jm         427    Morrison Formation
Kb         379    Benton Shale
Kd         454    Dakota Sandstone
Kn         482    Niobrara Formation
Ku         391    Niobrara Formation and Benton Shale, undivided
P&m        320    main body of Maroon Formation
Pms        316    Schoolhouse Member of Maroon Formation
QTbr        22    basalt rubble
Qa           6    stream-channel and flood-plain deposits along Brush Creek
Qac         25    undivided alluvium and colluvium
Qalc         7    stream-channel and flood-plain deposits along Eagle River
Qc          12    colluvium, undifferentiated
Qcd         12    colluvium of Dakota Sandstone
Qcg         12    gravelly colluvium
Qcv         12    basalt-rich colluvium
Qdo         34    older debris-flow deposits
Qdu         55    undifferentiated debris-flow and landslide deposits of Eby Creek
Qdy         15    younger debris-flow deposits
Qfo         33    older fan alluvium and colluvium
Qfy         32    younger fan alluvium and colluvium
Qls         16    landslide deposits
Qlsb        16    landslide derived from Benton Shale
Qlsn        16    landslide derived from Niobrara Formation
Qlsv        16    landslide debris of volcanic rocks
Qp         451    pediment deposit
Qtm         20    intermediate terrace alluvium
Qto         13    older terrace alluvium
Qtpl        19    lower oldest terrace alluvium
Qtpm        19    middle oldest terrace alluvium
Qtpu        19    upper oldest terrace alluvium
Qty         23    younger terrace alluvium
Tb         130    basaltic flows
Tbv         39    basaltic flows, volcaniclastic rocks, and conglomerate
Tg          51    Tertiary gravel
af           8    artificial fill

In the LABEL item, the & and @ refer to the Pennsylvanian and Triassic
symbols, respectively.

USER-DEFINED ITEMS IN EAGLEPY.AAT:
------------------------------------

ATTRIBUTE NAME: DESCRIPTION
DATABASE ITEM STRUCTURE: 80,80,C,0
DESCRIPTION: type of line entity
ITEM VALUES FOR 'DESCRIPTION':
(see table below)

ATTRIBUTE NAME: SYMBOL
DATABASE ITEM STRUCTURE: 3,3,I,0
DESCRIPTION: line symbol used to draw line entity (geol_sfo.lin and geoscamp1.lin)
ITEM VALUES FOR 'SYMBOL':
(see table below)

Relationship of items 'DESCRIPTION' and 'SYMBOL':

DESCRIPTION                                    SYMBOL
-----------------------------------------------------
contact, certain                                    1
contact, approximately located                      2
contact, concealed                                  4
high-angle fault, certain                         173
high-angle fault, concealed                       176
high-angle fault, inferred                        217
high-angle fault, certain, with bar and ball       50
high-angle fault, concealed, with bar and ball    184
high-angle fault, inferred, with bar and ball     183
landslide scarp, certain                           15
map boundary                                       50
marker bed, certain                                50
marker bed, approximately located                  51
water boundary                         0

---------------------------------------------------------------
COVERAGE NAME: eaglepit
---------------------------------------------------------------

USER-DEFINED ITEMS IN EAGLEPIT.PAT:
------------------------------------

ATTRIBUTE NAME: DESCRIPTION
DATABASE ITEM STRUCTURE: 80,80,C,0
DESCRIPTION: description of polygon
ITEM VALUES FOR 'DESCRIPTION': gravel pit

ATTRIBUTE NAME: SYMBOL
DATABASE ITEM STRUCTURE: 4,4,I,0
DESCRIPTION: shade symbol used to color polygon (color524.shd)
ITEM VALUES FOR 'SYMBOL': 0


USER-DEFINED ITEMS IN EAGLEPY.AAT:
------------------------------------

ATTRIBUTE NAME: DESCRIPTION
DATABASE ITEM STRUCTURE: 80,80,C,0
DESCRIPTION: type of line entity
ITEM VALUES FOR 'DESCRIPTION': gravel pit boundary

ATTRIBUTE NAME: SYMBOL
DATABASE ITEM STRUCTURE: 3,3,I,0
DESCRIPTION: line symbol used to draw line entity (geol_sfo.lin and geoscamp1.lin)
ITEM VALUES FOR 'SYMBOL': 1

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

Resource_Description: USGS Miscellaneous Field Studies Map MF-2361
Distribution_Liability:

Although this digital spatial data has been subjected to rigorous review and is substantially complete, it is released on the condition that neither the U.S. Geological Survey 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, Shapefile
Format_Version_Number: 7.1.2
Format_Information_Content: Geologic units and structural features
File_Decompression_Technique:

.tar.gz - UNIX gzip-compressed TAR file - use GNU zip and TAR .ZIP - Windows ZIP archive - use Winzip, PKZip, or similar program to extract

Transfer_Size: 2.7

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: http://pubs.usgs.gov/mf/2002/mf-2361/mf-2361.tar.gz
Network_Resource_Name: http://pubs.usgs.gov/mf/2002/mf-2361/mf-2361.zip

Digital_Form:

Digital_Transfer_Information:

Format_Name: TIFF
Format_Version_Number: 6.0
Format_Information_Content:

Graphic image of the base map on which geologic features were mapped

File_Decompression_Technique:Transfer_Size: 1.8

Digital_Transfer_Option:

Online_Option:

Computer_Contact_Information:

Network_Address:

Network_Resource_Name: http://pubs.usgs.gov/mf/2002/mf-2361/eaglebase.tar.gz
Network_Resource_Name: http://pubs.usgs.gov/mf/2002/mf-2361/eaglebase.zip

Fees: none

Metadata_Reference_Information:

Metadata_Date: 20160610
Metadata_Review_Date: 20020301
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

This page is <https://geo-nsdi.er.usgs.gov/metadata/map-mf/2361/metadata.html>