Results: 1 - 3 of 3
Feb 28, 1975
Economic Geology Report
Dec 31, 1973
Earth Sciences Report
… gravel, coarse sand, till, clay, shale, fine sand, silt and … erosion; 8)avoiding terracing of shale and mudstone slopes which …
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 …