Results: 1 - 3 of 3
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 …
Jun 04, 2008
Special Report
… hosted within Cretaceous shale bedrock and have expanded the …
Feb 29, 2008
Special Report
… by at least one contiguous thick shale sequence, the Smoky Group. …