Results: 1 - 8 of 8
Sep 26, 2017
Open File Report
… Pliensbachian for the Poker Chip Shale, late Aalenian for the Rock …
Dec 31, 1971
Earth Sciences Report
Dec 31, 1971
Earth Sciences Report
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 …
Dec 31, 1973
Earth Sciences Report
Dec 31, 1972
Earth Sciences Report
Dec 31, 1974
Earth Sciences Report
Dec 31, 1970
Earth Sciences Report