Quick
Search: 		  
advanced search
 GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help 
  Geological Magazine   Signup for GSW Email News
JOURNAL HOME HELP CONTACT PUBLISHER SUBSCRIBE ARCHIVE SEARCH TABLE OF CONTENTS
Geological Magazine; November 2005; v. 142; no. 6; p. 783-807; DOI: 10.1017/S0016756805000944
© 2005 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 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 HighWire
Right arrow Citing Articles via Web of Science (11)
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by VANDENBROUCKE, T. R. A.
Right arrow Articles by VERNIERS, J.
Right arrow Search for Related Content
GeoRef
Right arrow GeoRef Citation

Upper Ordovician chitinozoan biostratigraphy from the type Ashgill area (Cautley district) and the Pus Gill section (Dufton district, Cross Fell Inlier), Cumbria, Northern England

THIJS R. A. VANDENBROUCKE*,{dagger},{ddagger}, BARRIE RICKARDS§ and JACQUES VERNIERS*

* Research Unit Palaeontology, Ghent University, Krijgslaan 281/S 8, 9000 Ghent, Belgium
{dagger} Research Assistant of the Fund for Scientific Research – Flanders (F.W.O. – Vlaanderen)
§ Department of Earth Sciences, University of Cambridge, Downing Street, Cambridge CB2 3EQ, UK

{ddagger} Author for correspondence: thijs.vandenbroucke{at}ugent.be

Seventy-five samples from the classic sections through the historical type area of the Ashgill Series in the Cautley district and along Pus Gill in the Cross Fell Inlier have been examined for chitinozoans. The results of this study allowed the recognition of five internationally recognized biozones and the definition of two new Avalonian chitinozoan zones. From bottom upwards, these are: the Fungochitina spinifera, the Tanuchitina bergstroemi?, the Conochitina rugata, the Spinachitina fossensis, the Bursachitina umbilicata sp. n., the Ancyrochitina merga and the Belonechitina postrobusta zones. One new species is described: Bursachitina umbilicata sp. n. This biozonation enables a correlation between the Cautley district and the Baltoscandia and Gondwana palaeocontinents based on chitinozoans. The Baltoscandic chitinozoan zones are, therefore, now better correlated with the British chronostratigraphical scheme, which is still widely used. It is stratigraphically significant that the base of the Ashgill in its type area does not fall within the Tanuchitina bergstroemi Zone, as widely believed before, but in the Fungochitina spinifera Zone. In addition, chitinozoans from the Onnian (Caradoc) section of the Cross Fell Inlier provide a link with the type Caradoc section in Shropshire.

Key Words: Chitinozoa • Ashgill • biozonation • Cautley • Pus Gill • Avalonia




This article has been cited by other articles:


Home page
 Geological MagazineHome page
T. R. A. VANDENBROUCKE, A. ANCILLETTA, R. A. FORTEY, and J. VERNIERS
A modern assessment of Ordovician chitinozoans from the Shelve and Caradoc areas, Shropshire, and their significance for correlation
Geological Magazine, March 1, 2009; 146(2): 216 - 236.
[Abstract] [Full Text] [PDF]

Home page
 Geological MagazineHome page
T. R. A. VANDENBROUCKE, M. WILLIAMS, J. A. ZALASIEWICZ, J. R. DAVIES, and R. A. WATERS
Integrated Upper Ordovician graptolite-chitinozoan biostratigraphy of the Cardigan and Whitland areas, southwest Wales
Geological Magazine, March 1, 2008; 145(2): 199 - 214.
[Abstract] [Full Text] [PDF]


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