1891. 2011-05-17T18:29:36Z. 2015-10-21T14:59:21Z. Geological Survey (U.S.). The Survey. English. Public. Chaffee County (Colo.), Eagle County (Colo.), Lake County (Colo.), Park County (Colo.), Pitkin County (Colo.), and Summit County (Colo.).
Search Results
1909. 2011-05-17T19:39:20Z. 2015-10-21T14:59:23Z. Geological Survey (U.S.). The Survey. English. Public. El Paso County (Colo.), Fremont County (Colo.), Jefferson County (Colo.), Park County (Colo.), and Teller County (Colo.).
1893. 2011-05-17T19:41:53Z. 2015-10-21T14:59:23Z. Geological Survey (U.S.). The Survey. English. Public. Douglas County (Colo.), El Paso County (Colo.), Jefferson County (Colo.), Park County (Colo.), and Teller County (Colo.).