Two sketches of rock strata and outcrops. No Date.
Summary
PUBLISHED SOURCE: U.S. Geological and Geographical Survey of the Territories, 7th Annual Report (1873), Illustration B opposite page 326. EXPLORATION: U.S. Geological and Geographical Survey of the Territories (Hayden Survey) Sheet number 7. "Ill. B. Chapt. III. Endlich p. 149." Two sketches of rock strata and outcrops. "Red carboniferous sandstones capped by volcanic strata" is caption in publication.
Summary
PUBLISHED SOURCE: U.S. Geological and Geographical Survey of the Territories, 7th Annual Report (1873), Illustration B opposite page 326. EXPLORATION: U.S. Geological and Geographical Survey of the Territories (Hayden Survey) Sheet number 7. "Ill. B. Chapt. III. Endlich p. 149." Two sketches of rock strata and outcrops. "Red carboniferous sandstones capped by volcanic strata" is caption in publication.
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