REFINE
Browse All : Atlas Map and Geology by Campbell, R.A. of Illinois
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Author
[Campbell, R.A., Worthen, Amos Henry, 1813-1888]
Note
Hand colored map. Shows 8 geologic units (Tertiary, Coal measures, Lower Carboniferous, Devonian, Upper Silurian, Cincinnati Group, Trenton Limestone and Calciferous Group). Prime meridians: Greenwich and Washington.
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