Because of the increased importance of stone production in the Volcanic-Slate series during the past few years and the lack of literature dealing with utilization of certain types of these rocks, this circular is intended primarily to acquaint those interested with the physical and chemical properties, geologic occurrence, and general distribution of the commercial rocks along with the uses of the various products from the quarries. A comparison of the physical and chemical properties of the rocks with similar rocks in other areas is discussed briefly and shown in tables. By R.J. Councill, 1954. 30 pages.
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