Subject: Bentonite / Access: Public - Yale University Library GeoBlacklight Search Results

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1. Bentonite and fullers earth resources of the United States

1985. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey ; For sale by Branch of Distribution, USGS. English. Public. United States.

2. Thickness of upper Cretaceous rocks from the base of the Ardmore bentonite to the base of the Clay Spur bentonite (top of the lower Cretaceous rocks), Powder River Basin, Wyoming and Montana [microform]

1987. 2002-06-01T04:00:00Z. 2002-06-01T04:00:00Z. Geological Survey (U.S.). The Survey. English. Public. Powder River Basin (Wyo. and Mont.). Cretaceous.