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Start Over You searched for: Subject Geology, Stratigraphic Remove constraint Subject: Geology, Stratigraphic Spatial Coverage United States Remove constraint Spatial Coverage: United States

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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.
1956. 2018-06-13T20:11:15Z. 2018-06-13T20:11:15Z. Wilson, Charles William, 1905- cartographer. State of Tennessee, Dept. of Conservation, Division of Geology. English. cartographic image. Public. Appalachian Region, Cumberland Mountains, Appalachian Region., United States, and Cumberland Mountains. Pennsylvanian and From 280 to 310 million years ago.