Table I B. Specimens containing Lingula, Obolus, and Orbicula, from near the base of the lowest Protozoic sandstones of Wisconsin and Minnesota. (on opposite page view of) Medal-ruled, on steel, from the original Specimens. J.M. Butler. (to accompany) Illustrations to the Geological Report of Wisconsin, Iowa, and Minnesota. (with) Report of a Geological Survey of Wisconsin, Iowa and Minnesota ... 1852.
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Table I B. Specimens containing Lingula, Obolus, and Orbicula, from near the base of the lowest Protozoic sandstones of Wisconsin and Minnesota. (on opposite page view of) Medal-ruled, on steel, from the original Specimens. J.M. Butler. (to accompany) Illustrations to the Geological Report of Wisconsin, Iowa, and Minnesota. (with) Report of a Geological Survey of Wisconsin, Iowa and Minnesota ... 1852.
Full Title
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