Alaska Volcano Observatory - Geology and submarine physiography of Amchitka Island, Alaska

GEOLOGY AND SUBMARINE PHYSIOGRAPHY OF AMCHITKA ISLAND, ALASKA

Powers, H. A., Coats, R. R., and Nelson, W. H., 1960, Geology and submarine physiography of Amchitka Island, Alaska: U.S. Geological Survey Bulletin 1028-P, p. 521-554, 1 plate, scale approx. 1:76,032.

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DATA TABLES *Not all tables in a publication may be listed. Not all tables from a publication have data entered in the database.

250: Chemical and spectrographic analyses and norms of volcanic rocks from Amchitka Island

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* Analyses by U.S. Geological Survey. Super 1 nd=not determined. Super 2 Looked for but not found: Ag, As, Au, Be, Bi, Cd, Cs, Ge, In, La, Nb, Pt, Sb, Sn, Ta, Th, Tl, U, W, and Zn. 1. Obsidian tuff-breccia, Amchitka formation: sparse phenocrysts of andesine and clinopyroxene. Specimen No. 51-P-27. Lat 51o22'15''N; long 179o16'00''E. 2. Columnar lava, Amchitka formation; rich in phenocrysts of labradorite-andesine, ortho- and clinopyroxene. Specimen No. 51-P-31. Lat 51o27'40''N; long 179o09'25''E. 3. Flow banded lava, Chitka Point formation; rich in phenocrysts of calcic plagioclase, olivine, ortho- and clinopyroxene. Specimen No. 49-P-36. Lat 51o34'50''N; long 178o48'45''E. 4. Scoriaceous lava, Chitka Point formation; rich in phenocrysts of calcic plagioclase, brown hornblende, ortho- and clinopyroxene. Specimen No. 49-P-46. Lat 51o35'55''N; long 178o42'40''E. *

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51-P-27
51-P-31
49-P-36
49-P-46

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