Summit

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Geologic map of the Frisco quadrangle, Summit County, Colorado

New 1:24,000-scale geologic mapping along the Interstate-70 urban corridor in western Colorado, in support of the USGS Central Region State/USGS Cooperative Geologic Mapping Project, is contributing to a more complete understanding of the stratigraphy, st

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Generalized Surficial Geologic Map of the Denver 1°x2° Quadrangle, Colorado

Thirty-nine types of surficial geologic deposits and residual materials of Quaternary age are described and mapped in the greater Denver area, in part of the Front Range, and in the piedmont and plains east of Denver, Boulder, and Castle Rock. Description

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Geologic map of the Dillon quadrangle, Summit and Grand Counties, Colorado

New 1:24,000-scale geologic mapping along the Interstate-70 urban corridor in western Colorado, in support of the USGS Central Region State/USGS Cooperative Geologic Mapping Project, is contributing to a more complete understanding of the stratigraphy, st

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Map showing alpine debris flows triggered by a July 28, 1999 thunderstorm in the central Front Range of Colorado: Debris-flow polygons

On July 28, 1999, about 480 debris flows were triggered by an afternoon thunderstorm along the Continental Divide in Clear Creek and Summit counties in the central Front Range of Colorado. This cover shows the outlines of debris-flow source areas, travel

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Map showing alpine debris flows triggered by a July 28, 1999 thunderstorm in the central Front Range of Colorado: Debris-flow initiation points

On July 28, 1999, about 480 debris flows were triggered by an afternoon thunderstorm along the Continental Divide in Clear Creek and Summit counties in the central Front Range of Colorado. This cover shows the initiation locations of the debris flows. Jon

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Geologic map of the Dillon 7 1/2 minute quadrangle, Summit and Grand Counties, Colorado

This map is superceded by U.S. Geological Survey Miscellaneous Field Studies Map MF-2390. This is a digital geologic map of the Dillon Quadrangle, Summit and Grand Counties, Colorado.

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Spatial Geologic Data Model for the Gunnison, Grand Mesa, Uncompahgre National Forests Mineral Resource Assessment Area, Southwestern Colorado and Digital Data for the Leadville, Montrose, Durango, and Colorado Parts of the Grand Junction, Moab, and Cortez 1° X 2° Geologic Maps

Spatial Geologic Data Model for the Gunnison, Grand Mesa, Uncompahgre National Forests Mineral Resource Assessment Area, Southwestern Colorado and Arc/Info versions of the Leadville, Durangeo and Montrose 2 degree quadrangles as well as the Colorado half

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