Results: 1 - 3 of 3
Dec 31, 1982
Open File Report
… Iron, Lead Zinc, Lightweight Aggregate, Limestone, Magnetite, …
Dec 31, 1981
Economic Geology Report
… used for production of expanded aggregate. Further testing of the …
Dec 31, 1961
Earth Sciences Report
… sandstones and shales with an aggregate thickness of 4000 feet. …