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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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Generalized Surficial Geologic Map of the Pueblo 1° x 2° Quadrangle, Colorado

Fifty-three types of surficial geologic deposits and residual materials of Quaternary age are described in a pamphlet and located on a map of the greater Pueblo area, in part of the Front Range, in the Wet and Sangre de Cristo Mountains, and on the plains

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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This map is superceded by U.S. Geological Survey Miscellaneous Field Studies Map MF-2390.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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