1988. 2008-10-20T18:43:29Z. 2011-03-28T23:34:04Z. Richard, Lawrence V. New York State Education Dept. English. Public. New York (State), Pennsylvania, Ohio, and Ontario, Southern. Devonian.
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2002. 2002-09-20T18:12:30Z. 2016-07-26T21:19:13Z. Geological Survey (U.S.). U.S. Geological Survey. English. cartographic image. Public. Colorado, Piceance Creek Basin, Uinta Basin (Utah and Colo.), Mancos Shale., Mesaverde Group., Piceance Creek Basin., United States, and Uinta Basin. Cretaceous. and From 65 to 140 million years ago.
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.
1994. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey. English. Public. South Dakota. Precambrian.
1985. 2018-04-20T19:43:40Z. 2018-09-05T19:36:07Z. Morton, Robert A. Bureau of Economic Geology, University of Texas at Austin. English. cartographic image. Public. Texas, Gulf Region, and Gulf Region. Miocene and From 10 to 25 million years ago.
1973. 2018-08-08T18:01:55Z. 2018-09-05T19:47:04Z. Ogniben, Leo. Comitato per le scienze geologiche e minerarie. English. cartographic image. Public. Italy and Italy. Pliocene and From 2 to 10 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.). Jurassic.
1987. 2002-06-01T04:00:00Z. 2008-09-09T13:11:54Z. Geological Survey (U.S.). The Survey. English. Public. Powder River Basin (Wyo. and Mont.). Permian.
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.). Permian.