Results: 1 - 6 of 6
Apr 30, 2012
Open File Report
… by sulphur-stained, dark grey shale of the Westgate Formation. A … bentonite units in the otherwise shale-dominated Fish Scales … the Belle Fourche Formation is shale dominated with silty lenses, …
Sep 26, 2017
Open File Report
… Pliensbachian for the Poker Chip Shale, late Aalenian for the Rock …
May 03, 2018
Open File Report
May 03, 2018
Model
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, 1974
Earth Sciences Report