1974. 2008-09-03T20:16:52Z. 2016-07-23T21:11:01Z. Anderson, Sidney B. North Dakota Geological Survey. English. cartographic image. Public. North Dakota and North Dakota. Paleozoic, Precambrian, and From 230 million to 5 billion years ago.
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2009. 2009-06-08T18:03:57Z. 2012-05-03T16:07:38Z. Swezey, C. (Christopher). U.S. Dept. of the Interior, U.S. Geological Survey ; For sale by U.S. Geological Survey, Information Services. English. Public. Illinois Basin. Paleozoic and Mesozoic.
2008. 2008-09-30T14:31:42Z. 2012-04-23T14:42:14Z. Swezey, C. (Christopher). U.S. Geological Survey ; For sale by U.S. Geological Survey, Information Services. English. Public. Michigan Basin (Mich. and Ont.). Paleozoic and Mesozoic.
1980. 2013-08-27T17:43:35Z. 2013-09-04T19:52:21Z. Milici, Robert C., 1931-. Dept. of the Interior, U.S. Geological Survey. English. Public. Appalachian Basin.
1945. 2018-02-20T15:02:08Z. 2018-02-20T15:02:08Z. Cohee, George Vincent, 1907-. U.S. Geological Survey. English. cartographic image. Public. Michigan Basin (Mich. and Ont.), North America, and Michigan Basin. Ordovician, Cambrian, and From 425 to 570 million years ago.
1984. 2018-04-10T18:44:00Z. 2018-04-10T18:44:00Z. St. John, Bill, 1932-. American Association of Petroleum Geologists. English. cartographic image. Public.
1985. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Branch of Distribution, USGS. English. Public. North Dakota, Montana, and Williston Basin.
1985. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Branch of Distribution, USGS. English. Public. North Dakota, Montana, and Williston Basin.
1911. 2013-03-14T18:10:52Z. 2013-03-14T18:10:52Z. Munn, M. J. (Malcolm John), 1874-1949. U.S. Geological Survey. English. Public. Pennsylvania, Allegheny County, Beaver County, and Butler County.
2006. 2012-01-13T19:48:51Z. 2012-03-05T17:33:06Z. Ryder, Robert T. U.S. Geological Survey ; For sale by U.S. Geological Survey, Information Services. English. Public. Appalachian Basin, Ohio, West Virginia, Appalachian Basin., Ohio., and West Virginia. Silurian.