Results: 1 - 3 of 3
Oct 16, 2014
Open File Report
… of the lower Clearwater shale unit, that overlay the … where the lower Clearwater shale unit is thin (<5 m thick) or … study area, the lower Clearwater shale was found to be between 20 …
Jan 23, 2020
Data
… quartzite, other stones, clay, shale, salt, potash, gypsum, sodium …
Dec 31, 1982
Open File Report
… Barite, Bentonite, Clay and Shale, Coal, Copper, Coquina, …