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Preliminary geologic map of the northeastern part of the Tanana quadrangle, Alaska Preliminary geologic map of the northeastern part of the Tanana quadrangle, Alaska
Mapping is based on both ground observations and aerial observations from a helicopter, August 11-19 and September 1-5, 1970, and supplemented by interpretation from aerial photographs. Bedrock geology chiefly by R.M. Chapman, and surficial geology chiefly by W.E. Yeend.