Results: 1 - 2 of 2
Dec 31, 1974
Earth Sciences Report
… … Increasing demands for quality gravel prompted an investigation … 23 west of the fourth meridian and range 3 west of the fifth … tills, lacustrine materials and sand dunes which yield little or no …
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 …