Results: 1 - 4 of 4
Nov 18, 2008
Data
… coal, shaly-coal and coaly-shale), formation tops and …
Dec 31, 1982
Open File Report
… Barite, Bentonite, Clay and Shale, Coal, Copper, Coquina, …
Dec 31, 1957
Bulletin
… the lower part of the Colorado shale of Alberta and Saskatchewan, and in the Mowry shale of the Black Hills area of …