2000. 2002-06-01T04:00:00Z. 2016-07-23T21:10:24Z. Geological Survey (U.S.). U.S. Geological Survey ; For sale by U.S. Geological Survey, Information Services. English. cartographic image. Public. Arizona, Lees Ferry, Glen Canyon (Utah and Ariz.), Glen Canyon National Recreation Area (Utah and Ariz.), Lees Ferry (Ariz.), Lees Ferry., United States, Glen Canyon., and Glen Canyon National Recreation Area. Quaternary and From 2 million years ago.
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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.
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.
1999. 2002-06-01T04:00:00Z. 2016-07-16T21:16:14Z. Geological Survey (U.S.). U.S. Geological Survey ; For sale by U.S. Geological Survey, Information Services. English. cartographic image. Public. Appalachian Basin, United States, and Appalachian Basin. Pennsylvanian and From 280 to 310 million years ago.
