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Geology and zinc-lead deposits in the Durango area, Dubuque County, Iowa
Arthur E. Flint, C. Erwin Brown
1955, Miscellaneous Field Studies Map 33
Geologic investigations were begun in Iowa to appraise; (1) the possible occurrence of zinc ore in strata that elsewhere in the Upper Mississippi Valley zinc-lead district have been the principal sites of zinc concentration; and (2) lead ore of the type known as "crevice deposits," which were mined so extensively...
Geology of two areas of pegmatite deposits in southeastern Alaska
C.L. Sainsbury
1955, Open-File Report 55-159
A pegmatite deposit about 600 feet in diameter crops on a high bluff less than one-half mile east of a small unnamed cove between Redfish and Byron Bays, on the west coast of Baranof Island, southeastern Alaska.The deposit which comprises several pegmatite bodies consists of quartz, albite-oligoclase, microcline and mica,...
Pyrite deposits at Horseshoe Bay, Latouche Island, Alaska
Francis Adrien Stejer
1955, Open-File Report 55-175
Horseshoe Bay (see fig. 1) is in the southwest part of Prince William Sound at latitude 60°01'N and longitude 147°57'W. It is on the west side of Latouche Island about two miles southwest of the old mining camp of Latouche. Pyrite deposits crop out about one-half mile from the head...
Reconnaissance examination of the uranium deposits northeast of Winston, Broadwater County, Montana
George E. Becraft
1955, Trace Elements Memorandum 917
Anomalous radioactivity and a yellow secondary uranium mineral tentatively identified as carnotite have been found in Tertiary sedimentary rocks about 3 miles northeast of Winston, Mont. The uranium is in tuffs and tuffaceous shales and particularly in beds rich in organic matter. Carnotite(?) was identified from three localities, principally coating...