Results: 1 - 4 of 4
Dec 31, 1999
Geo-Note
… Early Cambrian marine black shale Ni-Mo deposits of south China …
Dec 31, 1988
Bulletin
… with a thick section of Ireton shale and lowest in regions where … present without overlying Ireton shale. The synthesis of this vast …
Dec 31, 1968
Earth Sciences Report
… a relatively impermeable marine shale, completely underlies the … beds of argillaceous sandstone, shale, and coal which immediately …
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 …