Skip to Main Content
Book Chapter

Abstract

By
Published:
January 01, 1975

Abstract

Pennsylvania rocks exposed in Knox, Peoria, Fulton, and Schuyler Qpunties in northwestern Illinois include 11 major marine units. The oldest marine unit is late Atokan and the youngest is early Missourian; the remainder are Desmoinesian in age. Each unit; has produced at least: some Conodonts, and the more than 300 samples produced an aggregate total in excess of 160,000 conodont specimens. These can be grouped into not fever than 78 kinds, considered species in disjunct element taxonomy. At least 10 multielement genera and 40 multielement species are represented. - Six new species: Diplognathodus illinoisensis, Neognathodus.metanodosus, N. polynodosus, N. oligonodus, N. anodosus and Gondolella pulchra are described.

Although ail marine beds were formed in hallow water,generally near shore, they represent the products of highly diverse environments.Conodont biofacies are sharply differentiated ind mirror this diversity. Ecologic.controls that effected conodont distribution are believed to have been salinity,energy, pH and possibly biologic antagonism.

You do not currently have access to this article.
Don't already have an account? Register

Figures & Tables

Contents

GSA Microform Publications

Pennsylvanian Conodont Biostratigraphy and Paleoecology of Northwestern Illinois

Glen K. Merrill
Glen K. Merrill
Department of Geology College of Charleston Charleston, South Carlina
Search for other works by this author on:
Geological Society of America
Volume
3
ISBN electronic:
9780813759036
Publication date:
January 01, 1975

GeoRef

References

Related

A comprehensive resource of eBooks for researchers in the Earth Sciences

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal