1946. 2018-01-23T14:42:00Z. 2018-01-23T14:42:00Z. De Witt, Wallace, Jr., 1920-2012. U.S. Geological Survey. English. cartographic image. Public. Pennsylvania, Ohio, Ohio., and Pennsylvania. Mississippian and From 310 to 345 million years ago.
Search Results
1948. 2018-01-30T14:30:37Z. 2018-01-30T14:30:37Z. Cohee, George Vincent, 1907-. U.S. Geological Survey. English. cartographic image. Public. Michigan Basin (Mich. and Ont.), North America, and Michigan Basin. Ordovician, Silurian, and From 405 to 500 million years ago.
1972. 2013-04-12T19:45:00Z. 2013-04-18T14:13:49Z. Langer, William H. U.S. Geological Survey. English. Public. Connecticut and Hartford Region.
1454. Thickness of principal clay unit, Hartford North quadrangle, Connecticut [cartographic material]
1972. 2013-04-12T18:51:56Z. 2013-04-18T14:13:46Z. Langer, William H. U.S. Geological Survey. English. Public. Connecticut and Hartford Region.
1972. 2012-10-26T19:50:21Z. 2012-10-26T19:52:27Z. Covington, H. R. U.S. Geological Survey. English. Public. Utah, Sevier County, Emery County, Grand County, Wayne County, and Piute County.
1953. 2013-01-22T17:11:28Z. 2015-10-21T15:09:12Z. Henderson, John R. U.S. Geological Survey. English. Public. Minnesota, Aitkin County, and Mille Lacs County.
1968. 2012-10-10T14:33:19Z. 2021-09-17T21:32:52Z. Willden, Ronald (Charles Ronald), 1929-. U.S. Geological Survey. English. Public. Middle West and Great Plains.
1968. 2012-10-10T15:19:06Z. 2013-03-18T22:22:43Z. Willden, Ronald (Charles Ronald), 1929-. U.S. Geological Survey. English. Public. Southern States.
1968. 2012-10-10T14:22:43Z. 2013-03-18T22:22:42Z. Carlson, John E. (John Edward), 1919-. U.S. Geological Survey. English. Public. Great Plains and West (U.S.).
1972. 2013-04-12T18:23:38Z. 2013-04-18T14:13:43Z. Pessl, Fred. U.S. Geological Survey. English. Public. Connecticut and Hartford Region.
