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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.

2. Quaternary deposits of Illinois

Yale Public content
1979. 2018-04-18T19:57:42Z. 2018-09-05T19:20:24Z. Lineback, Jerry Alvin, compiler. Institute of Natural Resources, State of Illinois, Illinois State Geological Survey. English. cartographic image. Public. Illinois and Illinois. Quaternary and From 2 million years ago.
1977. 2018-06-13T19:03:16Z. 2018-06-13T19:03:16Z. Muller, Ernest Hathaway, 1923-. Geological Survey. English. cartographic image. Public. New York (State) and Niagara Region. Quaternary and From 2 million years ago.
1989. 2018-06-21T18:02:18Z. 2018-06-21T18:02:18Z. Louisiana Geological Survey. Geological Society of America. English. cartographic image. Public. Mississippi River Valley and Mississippi River Valley. Quaternary and From 2 million years ago.