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From Miller tunnel of Incas Mine, black fragments are Pony express limestone of Wanakah formation. La Plata County, Colorado. 1936.

Dates

Date Taken
1936

Summary

Textures of intrusive breccias, composed of various rock fragments in a matrix of fine- grained rock: From Miller tunnel of Incas Mine, black fragments are Pony express limestone of Wanakah formation; light fragments are porphyry. Colorado. Circa 1936. Plate 5-A, in U.S.Geological Survey Professional paper 219. 1949.

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Data Owner :
U.S. Geological Survey

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Identifiers

Type Scheme Key
name photoLibrary eeb00028
number photoLibrary 9649
batch photoLibrary btch295
number_in_book photoLibrary 28

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