Skip to Main Content
Book Chapter

Biostratigraphy, palaeoecology and palaeogeography of the Middle Cenomanian–Early Turonian Levant Platform in Central Jordan based on ostracods

By
Abdel-Mohsen M. Morsi
Abdel-Mohsen M. Morsi
1
Geology Department, Faculty of Science
,
Ain Shams University
,
11566 Cairo
,
Egypt
Search for other works by this author on:
;
Jens E. Wendler
Jens E. Wendler
2
Bremen University
,
Geosience department, P.O. Box 330440, 28334 Bremen
,
Germany
3
Present address:
Smithsonian Institution National Museum of Natural History
,
10th & Constitution NW
,
Washington, DC 20560-0121
,
USA
Search for other works by this author on:
Published:
January 01, 2010

Abstract

Study of a Cenomanian–Turonian sequence, including the oceanic anoxic event 2 (OAE2) in Central Jordan, yielded 22 ostracod species from the Middle–Late Cenomanian interval; no ostracods were found in the Early Turonian. The majority of the taxa have a wide geographical distribution along the southern shores of the Tethys; from Morocco in the west to the Arabian Gulf region in the east. Biogeographical homogeneity of the ostracod associations in North Africa and the Middle East reflects facilitated communication along the whole expanse of the southern Tethys margin during the Cenomanian, and suggests similar living conditions and absence of important geographical barriers that could hinder marine faunal exchange. Biostratigraphically, the investigated fauna revealed five informal ostracod biozones (I to V from older to younger). The recorded assemblages are characterized by ostracod faunas of typical marine shelf setting in biozone I, shelf lagoonal setting with fresh-water influence in biozone II, marine shelf setting with intervals of fresh-water supply in biozones III and IV, and reduced oxygen levels in the interval of biozone V. This sequence of biozones provides palaeontological evidence for the occurrence of an interval of enhanced fresh-water influence in Levant platform lagoons preceeding OAE2. A combined biostratigraphic and chemostratigraphic time scale based on stable carbon isotopes reveals the first appearance of Reticulicosta kenaanensis, previously described as an Early Turonian indicator species already in the Late Cenomanian. Absence of ostracods throughout the Early Turonian indicates environmental conditions adverse to ostracods during most of OAE2 and its aftermath interpreted to reflect strong water column stratification.

You do not currently have access to this article.

Figures & Tables

Contents

Geological Society, London, Special Publications

Evolution of the Levant Margin and Western Arabia Platform since the Mesozoic

C. Homberg
C. Homberg
University Pierre et Marie Curie, France
Search for other works by this author on:
;
M. Bachmann
M. Bachmann
University of Bremen, Germany
Search for other works by this author on:
Geological Society of London
Volume
341
ISBN electronic:
9781862395893
Publication date:
January 01, 2010

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