Subject: Excavation / Spatial Coverage: Colorado - Yale University Library GeoBlacklight Search Results

Start Over Subject Excavation Spatial Coverage Colorado

1. Map showing relative ease of excavation in the Aspen quadrangle, Pikin County, Colorado [cartographic material]

1972. 2013-04-17T19:32:06Z. 2013-05-02T15:44:45Z. Bryant, Bruce, 1930-. Geological Survey. English. Public. Colorado and Pitkin County.

2. Map showing relative excavatability of geologic materials in the Parker quadrangle, Arapahoe and Douglas Counties, Colorado [cartographic material]

1972. 2013-02-21T19:26:13Z. 2013-03-18T22:37:26Z. Maberry, John O., 1935-. U.S. Geological Survey. English. Public. Colorado, Arapahoe County, and Douglas County.

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