Skip to Main Content
Book Chapter

Palaeobiogeography and the Ordovician and Mesozoic-Cenozoic biotic radiations

By
A. W. Owen
A. W. Owen
Division of Earth Sciences, University of Glasgow, Gregory Building, Lilybank Gardens, Glasgow G12 8QQ, UK (e-mail: a.owen@earthsci.gla.ac.uk
Search for other works by this author on:
J. A. Crame
J. A. Crame
British Antarctic Survey, High Cross, Madingley Road, Cambridge CB3 0ET, UK (e-mail: A.Crame@bas.ac.uk)
Search for other works by this author on:
Published:
January 01, 2002

Abstract

Curves of taxonomic diversity through geological time consistently show major evolutionary radiations during the Ordovician Period and from the mid-Mesozoic to the present day. Both intervals were characterized by marked biotic provincialism, reflecting episodes of major continental break-up and global tectonism, and their later histories featured steep global climatic gradients. The Ordovician radiation can be recognized at a wide spectrum of taxonomic levels from species to class, and the biogeographical patterns associated with the radiation of individual clades reflect a complex combination of plate distribution, tectonic activity, sedimentary environment, sea-level rise and, ultimately, glaciation. The true scale of the mid-Mesozoic-Cenozoic biotic radiation is currently a topic of intense debate but there is no doubt that it affected plants and animals in both the marine and terrestrial realms. The role of land bridges and ocean gateways in controlling the formation of biodiversity patterns has been a persistent theme in Mesozoic-Cenozoic bio-geography, and a complex set of Neogene tectonic events probably aided the development of both latitudinal and longitudinal provinces during the Cenozoic. The present volume highlights some of the successes across a spectrum of approaches to unravelling the Ordovician and Mesozoic-Cenozoic radiations within the context of palaeobiogeography.

You do not currently have access to this article.

Figures & Tables

Contents

Geological Society, London, Special Publications

Palaeobiogeography and Biodiversity Change: the Ordovician and Mesozoic–Cenozoic Radiations

J. A. Crame
J. A. Crame
British Antarctic Survey, Cambridge, UK
Search for other works by this author on:
A. W. Owen
A. W. Owen
University of Glasgow, UK
Search for other works by this author on:
Geological Society of London
Volume
194
ISBN electronic:
9781862394421
Publication date:
January 01, 2002

GeoRef

References

Related

Citing Books via

Close Modal
This Feature Is Available To Subscribers Only

Sign In or Create an Account

Close Modal
Close Modal