Geological map of the United States

Geological map of the United States

JPG 2787 × 1945

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A historical geological map of the United States compiled in 1874 by C.H. Hitchcock and W.P. Blake, showing various rock formations with a color-coded legend.

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Size 1.7 MB
TypeImage
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LicenseFree download

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Colors

Beige
Tan
Gold
Brown