Results: 1 - 5 of 5
Aug 31, 1977
Open File Report
… Cretaceous Clearwater Formation (shale), the Grand Rapids Formation …
Feb 28, 1993
Open File 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, 1973
Earth Sciences Report
Dec 31, 1974
Earth Sciences Report