Subject: Geology, Stratigraphic / Spatial Coverage: Middle West / Temporal Coverage: Paleozoic - Yale University Library GeoBlacklight Search Results

Start Over Subject Geology, Stratigraphic Spatial Coverage Middle West Temporal Coverage Paleozoic

1. Maps showing areal extent of selected Paleozoic shales in the northern midcontinent, U.S.A.

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.

2. Maps showing thickness and limestone-dolostone ratios of selected Paleozoic carbonate units in the northern midcontinent, U.S.A.

1996. 2002-06-01T04:00:00Z. 2016-05-18T18:44:14Z. Geological Survey (U.S.). The Survey ; For sale by U.S. Geological Survey Information Services. English. Public. Middle West. Paleozoic.