Middle Ordovician Conodont Biostratigraphy of the Coburn Formation in Central Pennsylvania and its Correlation with the New York Standard Succession
MetadataShow full item record
Publisher:The Ohio State University
Series/Report no.:The Ohio State University. Department of Geological Sciences Senior Theses; 1999
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.
Items in Knowledge Bank are protected by copyright, with all rights reserved, unless otherwise indicated.