Skip to Main Content
Book Chapter

Middle and Upper Jurassic stratigraphy and sedimentary evolution of Lebanon (Levantine margin): palaeoenvironmental and geodynamic implications

By
Pierre-Yves Collin
Pierre-Yves Collin
1
UPMC University Paris 06
,
UMR 7193, ISTEP (Institute of Earth Sciences of Paris), 4 place Jussieu, case 117, F-75005, Paris
,
France
Search for other works by this author on:
;
Anna Mancinelli
Anna Mancinelli
2
Università di Camerino
,
Dep. Scienze della Terra, via Gentile III da Varano, 62032 Camerino
,
Italy
Search for other works by this author on:
;
Maurizio Chiocchini
Maurizio Chiocchini
3
Via Tazio Nuvolari n.15
,
00144 Roma
,
Italy
Search for other works by this author on:
;
Mustapha Mroueh
Mustapha Mroueh
4
Agronomy Department
,
Lebanese University
,
BP13-5368 Chourane, Beirut 1002
,
Lebanon
Search for other works by this author on:
;
Walid Hamdam
Walid Hamdam
4
Agronomy Department
,
Lebanese University
,
BP13-5368 Chourane, Beirut 1002
,
Lebanon
Search for other works by this author on:
;
Fahti Higazi
Fahti Higazi
4
Agronomy Department
,
Lebanese University
,
BP13-5368 Chourane, Beirut 1002
,
Lebanon
Search for other works by this author on:
Published:
January 01, 2010

Abstract

The Arabian, African and Eurasian plates interact in the Levantine region. Despite numerous studies of the region, many geological issues relating to Mesozoic times remain unresolved. The Lebanon passive margin is a key area for understanding Neo-Tethyan sedimentary history during this period. The Jurassic succession in Lebanon is well exposed and thick (more than 1000 m). It is more or less complete and relatively undeformed. With a few recent exceptions most studies of the area were made in the 1950s and so the sedimentary evolution of the Jurassic is only partly understood.

This study provides (1) a new sedimentary and sequence stratigraphic framework, and (2) a new biostratigraphic framework based on benthic foraminifera and calcareous algae. Palaeoenvironmental and geodynamic conclusions are inferred.

Jurassic outcrops occur in both the Mount Lebanon and the Anti-Lebanon areas. Here, they were studied essentially in Mount Lebanon. The Jurassic succession can be divided into three parts: (1) the lower part (Kesrouane Formation) is a thick succession of marine limestones or dolomites; (2) the middle part (Bhannes Formation) consists mainly of basaltic eruptive rocks associated with pyroclastic strata; (3) the upper part (Bikfaya Formation) is a succession of marine limestones.

During the Bathonian, Callovian, Oxfordian and parts of the Kimmeridgian, a large epicontinental shelf, with very shallow marine environments, extended across Lebanon (Kesrouane Formation). The period was characterized by a stable platform morphology. It was a tectonically quiet period, although intense subsidence allowed the accumulation of a thick sediment package. During the Kimmeridgian, the carbonate platform regime that had dominated Lebanon during the Middle Jurassic came to an abrupt end, as evidenced by a regional unconformity, a regression and block faulting. This rifting phase is associated with a volcanic event (Bhannes Formation) that is recognized from northern to southern Lebanon. During the Lower Jurassic (Kimmeridgian p.p. to Tithonian p.p.) shallow marine carbonate shelf deposits are observed again (Bikfaya Formation), indicating a marine transgression. This last formation exhibits rapid lateral thickness variations, because of active block faulting and erosion, and is overlain by continental sandstones of the basal Cretaceous.

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