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Geologic map of bastnaesite deposits, Birthday claims, San Bernardino County, California Geologic map of bastnaesite deposits, Birthday claims, San Bernardino County, California
In April 1949 a deposit containing considerable quantities of the rare mineral bastnaesite - the fluorocarbonate of cerium, lanthanum, and other rare earths - was discovered near Mountain Pass, San Bernardino County, Calif. Small quantities of bastnaesite have been found in several places in the United States, but this area is the first that offers promise of being a commercial source of...
Geologic map of the Barnes Hill talc prospect, Waterbury, Vermont Geologic map of the Barnes Hill talc prospect, Waterbury, Vermont
The Barnes Hill talc prospect is in northeastern Waterbury township, Washington County, Vermont, about 2.2 miles N. 35° E. of the road triangle at Waterbury Center. The deposit occurs in a body of ultramafic rock that crops out between the altitudes of 1,150 and 1,190 feet above sea level, near the crest of a broad, low ridge on a gently rolling upland of low relief. The area surveyed is...
Geologic structure map of the Beetown lead-zinc area, Grant County, Wisconsin Geologic structure map of the Beetown lead-zinc area, Grant County, Wisconsin
The Beetown area, in Grant County, Wisconsin, in the northwestern part of the Upper Mississippi Valley zinc-lead district, lies in the western part of T. 4 N., R. 4 W., and the eastern part of T. 4 N., R. 5 W. The village of Beetown is at about its center. Recent geologic investigations in the area by the U.S. Geological Survey, in cooperation with the Wisconsin Geological and Natural...