Dataset Identification:
Resource Abstract:
- description: 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.; 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.
Citation
- Title Geologic map of the Eagle quadrangle, Eagle County, Colorado.
-
- creation Date
2018-05-21T13:14:46.212101
Resource language:
Processing environment:
Back to top:
Metadata data stamp:
2018-08-06T23:27:56Z
Resource Maintenance Information
- maintenance or update frequency:
- notes: This metadata record was generated by an xslt transformation from a dc metadata record; Transform by Stephen M. Richard, based
on a transform by Damian Ulbricht. Run on 2018-08-06T23:27:56Z
Metadata contact
-
pointOfContact
- organisation Name
CINERGI Metadata catalog
-
- Contact information
-
-
- Address
-
- electronic Mail Address cinergi@sdsc.edu
Metadata language
eng
Metadata character set encoding:
utf8
Metadata standard for this record:
ISO 19139 Geographic Information - Metadata - Implementation Specification
standard version:
2007
Metadata record identifier:
urn:dciso:metadataabout:28a5a8e9-20d8-4c4c-b3c3-96edfe73252b
Metadata record format is ISO19139 XML (MD_Metadata)