Results: 1 - 5 of 5
Apr 13, 2008
Special Report
Jan 14, 2010
Open File Report
… Anomalous uranium values in shale and sandstone of the St. Mary …
Dec 31, 1961
Earth Sciences Report
Feb 29, 2008
Special Report
… by at least one contiguous thick shale sequence, the Smoky Group. …
Dec 31, 1966
Bulletin
… with the first white-speckled shale 'zone' is used as a datum …