Results: 1 - 3 of 3
Nov 18, 2008
Data
… analyses of 57 mudstone, 29 shale, 13 ironstone, 6 pyrite …
Dec 31, 1958
Bulletin
… environment. The Bearpaw marine shale of southern Alberta was …
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 …