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This is a coverage of the Colorado Plateau coal assessment study area. The study area outline was drawn on the county lines that most closely outline the coal-bearing rocks in the Colorado Plateau Region. The county outlines originate from a national coverage for which lines were extracted from U.S. Census 1990 TIGER/line files using an AML program written by Nebert, D., and Negri, M., USGS-Water Resources Division (WRD), running on two Data General 6220 servers.
New 1:24,000-scale geologic mapping along the Interstate-70urban corridor in western Colorado, in support of the State/USGS Cooperative Geologic Mapping Project, is contributing to amore complete understanding of the stratigraphy, structure,tectonic evolution, and hazard potential of this rapidlydeveloping region. The 1:24,000-scale Vail East quadranglestraddles the Gore fault system, the western structuralboundary of the Gore Range. The Gore fault system is acontractional structure that has been recurrently active sinceat least the early Paleozoic and marks the approximate easternboundary of the Central Colorado trough, a thick late Paleozoicdepocenter into which thousands of meters of clastic sedimentwere deposited...
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...
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...
Spatial Geologic Data Model for the Gunnison, Grand Mesa, UncompahgreNational Forests Mineral Resource Assessment Area, Southwestern Coloradoand Digital Data for the Leadville, Montrose, Durango, and Colorado Partsof the Grand Junction, Moab, and Cortez 1� X 2� Geologic Maps
Spatial Geologic Data Model for the Gunnison, Grand Mesa, Uncompahgre NationalForests Mineral Resource Assessment Area, Southwestern Coloradoand Arc/Info versions of the Leadville, Durangeo and Montrose 2 degreequadrangles as well as the Colorado half of the Grand Junction, Moab andCortez 2 degree quadrangles.