Six charts showing biostratigraphic zones, and correlations based on conodonts from the Devonian and Mississippian rocks of the Upper Mississippi Valley
Collinson, Charles William; Scott, Alan J.; Rexroad, Carl B.
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https://hdl.handle.net/2142/44536
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Six charts showing biostratigraphic zones, and correlations based on conodonts from the Devonian and Mississippian rocks of the Upper Mississippi Valley
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