Results: 1 - 3 of 3
Jan 23, 2020
Data
… are naturally occurring metallic and industrial minerals, diamonds, … coal, peat, humalite, and sand and gravel, as well as minerals that …
Dec 31, 1964
Earth Sciences Report
… hummocky disintegration moraine and end moraine. Glaciofluvial deposits of sand and gravel, in the form of outwash …
Dec 31, 1982
Open File Report
… is continually being updated and this report will be recompiled … Phosphate Rock, Potash, Salt, Sand and Gravel, Sandstone-Siltstone, Silica …