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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.
This dataset represents geology compiled for the upper AnimasRiver Watershed near Silverton, Colorado. The source data usedare derived from 1:24,000, 1:20,000, 1:48,000 and 1:250,000-scalegeologic maps by geologists who have worked in this area sincethe early 1960's.
Surficial geologic maps along the riparian zone of the Animas Riverand its headwater tributaries, Silverton to Durango, Colorado, withupper Animas River watershed gradient profiles
This product consists of Adobe Acrobat .PDF format documents for 10surficial geologic strip maps along the Animas River watershed from itsmajor headwater tributaries, south to Durango, Colo. The Animas Riveroriginates in the San Juan Mountains north of the historic mining townof Silverton, Colo. The surficial geologic maps identify surficialdeposits, such as floodplain, and terrace gravels, alluvial fans,glacial till, talus, colluvium, landslides, and bogs. Sixteen primaryunits were mapped that included human-related deposits and structures,eight alluvial deposits, four colluvial deposits, one glacial deposit,one travertine deposit, and undifferentiated bedrock. Each of thesurficial geologic strip maps has .PDF...
Ferricrete, manganocrete, and bog iron occurrences withselected sedge bogs and active iron bogs and springs inthe upper Animas River watershed, San Juan County,Colorado
During 1996 to 2000, the Bureau of Land Management, NationalPark Service, Environmental Protection Agency, United StatesDepartment of Agriculture (USDA) Forest Service, and theU.S. Geological Survey (USGS) developed a coordinatedstrategy to (1) study the environmental effects ofhistorical mining on Federal lands, and (2) remediatecontaminated sites that have the greatest impact on waterquality and ecosystem health. This dataset providesinformation that contributes to these overall objectives andis part of the USGS Abandoned Mine Lands Initiative. Datapresented here represent ferricrete occurrences and selectediron bogs and springs in the upper Animas River watershed inSan Juan County near Silverton, Colorado. Ferricretes(stratified...
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.