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Publication Extents

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Geology of the Golden Zone mine area, Alaska
C. C. Hawley, Allen L. Clark, J. Alan Benfer
1968, Open-File Report 68-122
The Golden Zone mine area, in the upper Chulitna district, is underlain mainly by siltstone and tuff, volcanic conglomerate and breccia, and limestone. These rocks were invaded, probably in the Tertiary, by dikes and a small stock of porphyry. The ore deposits of the area are the Golden Zone breccia...
Carbonate rocks of Cambrian and Ordovician age in the Lancaster quadrangle, Pennsylvania
Harold Meisler, Albert E. Becher
1968, Bulletin 1254-G
Detailed mapping has shown that the carbonate rocks of Cambrian and Ordovician age in the Lancaster quadrangle, Pennsylvania, can be divided into 14 rock-stratigraphic units. These units are defined primarily by their relative proportions of limestone and dolomite. The oldest units, the Vintage, Kinzers, and Ledger Formations of Cambrian age,...