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Middle Ordovician Conodont Biostratigraphy of the Coburn Formation in Central Pennsylvania and its Correlation with the New York Standard Succession

Please use this identifier to cite or link to this item: http://hdl.handle.net/1811/28557

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Title: Middle Ordovician Conodont Biostratigraphy of the Coburn Formation in Central Pennsylvania and its Correlation with the New York Standard Succession
Creators: Bellomy, Nathan
Advisor: Bergstrom, Stig
Issue Date: 1999-08
Abstract: Middle Ordovician conodonts have been little studied previously in central Pennsylvania. The present study of samples from a well-exposed section through the Coburn Formation near Reedsville produced a moderately abundant and not very diverse conodont fauna dominated by Phragmodus undatus, Panderodus sp., Drepanoistodus suberectus, and Plectodina aculeata. Important for the correlation of the uppermost Coburn is the occurrence of Polyplacognathus ramosus, which suggests an age no younger than the A. tvaerensis Zone. Based on conodont, graptolite, and K-bentonite evidence, the Coburn is correlated with a portion of the Flat Creek Member of the Utica Shale, and with the Shermanian part of the Trenton Group, of New York.
Series/Report no.: The Ohio State University. Department of Geological Sciences Senior Theses; 1999
URI: http://hdl.handle.net/1811/28557
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