Alaska Volcano Observatory - Geology of Great Sitkin Island, Alaska

GEOLOGY OF GREAT SITKIN ISLAND, ALASKA

Simons, F. S., and Mathewson, D. E., 1955, Geology of Great Sitkin Island, Alaska: in Investigations of Alaskan volcanoes, U.S. Geological Survey Bulletin 1028-B, p. 21-43, 1 sheet, scale 1:50,000.

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235: Table on page 30

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236: Analysis, in volume percent, exclusive of water, of samples of fumarole gases from Great Sitkin Island

* By mass spectrometer, National Bureau Standards. After Byers and Brannock, 1949, p. 732. super 1: fraction is uncertain. Sample 1: Fumarole 1, on low rounded knoll beneath which is hollow shell and bubbling water. Sample 2: Fumarole 2, six to eight feet above bottom of gully. Sample 3: Fumarole 3, at bottom of gully. Sample 4: Fumarole 4, at bottom of gully within 50 feet of fumarole 3. *

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