1880. 2011-03-29T19:14:23Z. 2022-03-29T20:38:41Z. Geological Survey (U.S.). The Survey. English. Public. Alabama.
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1880. 2011-05-18T18:13:57Z. 2015-10-21T14:59:28Z. Geological Survey (U.S.). The Survey. English. Public. Alabama.
1880. 2011-03-29T19:19:20Z. 2022-03-29T20:38:41Z. Geological Survey (U.S.). The Survey. English. Public. Arizona.
1880. 2011-05-19T13:42:42Z. 2015-10-21T14:59:31Z. Geological Survey (U.S.). The Survey. English. Public. Arizona.
1880. 2011-03-29T19:17:39Z. 2022-03-29T20:38:41Z. Geological Survey (U.S.). The Survey. English. Public. Arkansas.
1880. 2011-05-18T18:28:32Z. 2015-10-21T14:59:28Z. Geological Survey (U.S.). The Survey. English. Public. Arkansas.
1880. 2011-03-30T15:54:32Z. 2022-03-29T20:38:41Z. Geological Survey (U.S.). The Survey. English. Public. California.
1880. 2011-05-19T20:42:03Z. 2015-10-21T14:59:34Z. Geological Survey (U.S.). The Survey. English. Public. California.
1880. 2011-05-19T13:45:28Z. 2015-10-21T14:59:31Z. Geological Survey (U.S.). The Survey. English. Public. Colorado.
1880. 2011-04-14T16:28:17Z. 2022-03-29T20:38:41Z. Geological Survey (U.S.). The Survey. English. Public. Delaware.