1926. 2018-07-02T18:08:58Z. 2018-07-02T18:08:58Z. Dyer, William Spafford, 1894-. Geological Survey. English. cartographic image. Public. New Brunswick and Chipman Region. Paleozoic and From 230 to 570 million years ago.
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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.
1984. 2023-08-29T18:59:31Z. 2023-08-30T03:02:18Z. Detterman, Robert L., author. U.S. Geological Survey. English. cartographic image. Public. Alaska and Alaska. Paleozoic, Mesozoic, and From 65 to 570 million years ago.
1926. 2018-07-02T18:06:17Z. 2018-07-02T18:06:17Z. Dyer, William Spafford, 1894-. Geological Survey. English. cartographic image. Public. New Brunswick and Minto Region. Paleozoic and From 230 to 570 million years ago.
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.