Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
  Geological Magazine   Email Content Delivery
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Geological Magazine; March 2007; v. 144; no. 2; p. 225-234; DOI: 10.1017/S0016756806003049
© 2007 Cambridge University Press (CUP)
This Article
Right arrow Figures Only
Right arrow Full Text
Right arrow Full Text (PDF)
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Right arrow Citation Map
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in Web of Science
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by LOYDELL, D. K.
Right arrow Articles by EBERT, J. R.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

The lower Williamson Shale (Silurian) of New York: a biostratigraphical enigma

D. K. LOYDELL*,{dagger}, M. A. KLEFFNER{ddagger}, G. L. MULLINS§, A. BUTCHER*, D. K. MATTESON and J. R. EBERT

* School of Earth and Environmental Sciences, University of Portsmouth, Burnaby Road, Portsmouth PO1 3QL, UK
{dagger} Department of Geological Sciences, The Ohio State University at Lima, 4240 Campus Drive, Lima, OH 45804-3576, USA
§ Department of Geology, University of Leicester, University Road, Leicester LE1 7RH, UK
Earth Sciences Department, SUNY College at Oneonta, Oneonta, NY 13820-4015, USA

{dagger} Author for correspondence: david.loydell{at}port.ac.uk

The lower Williamson Shale at Tryon Park, Rochester, New York State is unique in the co-occurrence of Stimulograptus clintonensis (Hall), previously recorded only from the middle Telychian, and Pterospathodus amorphognathoides amorphognathoides Walliser, previously recorded only from the upper Telychian (Cyrtograptus lapworthi Biozone and higher). These two co-occurring fossils are clearly providing contradictory ages for the lower Williamson Shale. The incorporation of chitinozoan data from both the Williamson and Willowvale shales does not support unequivocally either the graptolite- or conodont-derived biostratigraphy and thus the age of the lower Williamson Shale remains problematical.

Key Words: graptolites • chitinozoans • conodonts • Llandovery • Silurian






JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Copyright © 2009 by Cambridge University Press (CUP)