1981. 2012-02-03T17:53:34Z. 2012-03-05T17:38:55Z. Patchen, Douglas G. West Virginia Geological and Economic Survey. English. Public. West Virginia. Devonian.
Search Results
1965. 2012-09-27T20:04:35Z. 2013-03-18T22:20:22Z. Scott, Glenn Robert, 1918-. U.S. Geological Survey. English. Public. Colorado. Cretaceous.
1975. 2013-08-30T18:30:50Z. 2013-09-04T19:53:08Z. Scott, Glenn Robert, 1918-. The Survey. English. Public. Colorado, Fremont County, Custer County, and U.S.
1987. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Map Division. English. Public. Wyoming and Lincoln County.
1992. 2002-06-01T04:00:00Z. 2016-05-17T16:22:16Z. Geological Survey (U.S.). U.S. Geological Survey ; For sale by Map Distribution. English. cartographic image. Public. Middle West and Middle West. Paleozoic and From 230 to 570 million years ago.
1961. 2018-05-14T19:36:47Z. 2018-05-14T19:36:47Z. South Dakota Geological Survey. South Dakota Geological Survey. English. cartographic image,text. Public. South Dakota, Yankton County, Yankton County (S.D.), and Yankton County.
1950. 2018-01-23T16:27:13Z. 2018-01-23T16:27:13Z. Pepper, James F. U.S. Dept. of the Interior, Geological Survey. English. cartographic image. Public. New York (State), New York (State), Western, and New York, Western. Devonian and From 345 to 405 million years ago.
1987. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey. English. Public. Powder River Basin (Wyo. and Mont.). Cretaceous.
1987. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey. English. Public. Powder River Basin (Wyo. and Mont.). Cretaceous.
1987. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey. English. Public. Powder River Basin (Wyo. and Mont.). Cretaceous.