Dec 31, 1982
Open File Report
… Potash, Salt, Sand and Gravel, Sandstone-Siltstone, Silica Sand, …
Sep 26, 2017
Data
… massive (commonly >1m thick) sandstone bed assigned to the basal …
Sep 26, 2017
Open File Report
… for the Jurassic Basal sandstone (however, this unit is …