Alaska Volcano Observatory

Olivine basalt. Basalt flow of Idak block, at coastline. Color value from rock-color chart distributed by the Geological Society of America: (N5, IVc)

Sample Location:

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Legend

	Red (Warning)
	Orange (Watch)
	Yellow (Advisory)
	Green (Normal)
	Uninstrumented

50 km

30 mi

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References Cited

[1] Pb and Sr isotopes in volcanic rocks from the Aleutian Islands and Pribilof Islands, Alaska, 1978

Kay, R. W., Sun, S. S., and Lee-Hu, C. N., 1978, Pb and Sr isotopes in volcanic rocks from the Aleutian Islands and Pribilof Islands, Alaska: Geochimica et Cosmochimica Acta, v. 42, p. 263-274.

[2] Geochemical constraints on the origin of Aleutian magmas, 1977

Kay, R. W., 1977, Geochemical constraints on the origin of Aleutian magmas: in Talwani, Manik and Pitman, W. C. III., (eds.), Island arcs, deep sea trenches and back-arc basins, American Geophysical Union Maurice Ewing Series 0001, p. 229-242.

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