Lyell Collection
Geological Society, London, Special Publications
Lyell Centre  |   Lyell Collection  |   Subscriptions   |   Geological Society  |   Email alerts  |   Online bookshop  |   Help

Keywords:
Author:
Advanced search>>
This Article
Right arrow Full Text (PDF)
Right arrow References
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 Request Permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by De Weaver, P.
Right arrow Articles by Bechennec, F.
Right arrow Search for Related Content
Geological Society, London, Special Publications; 1990; v. 49; p. 225-238;
DOI: 10.1144/GSL.SP.1992.049.01.15
© 1990 Geological Society of London

Evolution of the Oman Tethyan Continental Margin

Permian to Cretaceous radiolarian biostratigraphic data from the Hawasina Complex, Oman Mountains

P. De Weaver1, Ch. Bourdillon-de Grissac2 & F. Bechennec3

1 CNRS UR 1315, Université P. M. Curie, T 15-16 E4, F-75 252 Paris Cedex 05, France
2 BRGM-SGN-GEO, F-45 060 Orléans, France
3 BRGM, 10 Rue Picheri, 44300 Nantes, France

The analysis of foraminifera and radiolaria in 3000 carbonate and 150 siliceous rock samples from the Oman Mountains results in revision of the existing stratigraphy and supports the definition of new units. In the Hawasina allochthonous unit the main results are as follows: (i) Permian bedded chert exists near the base of the sequence and is thus the first Permian bedded chert occurrence reported from the Tethyan region); (ii) an important volcanic event is dated as Triassic; (iii) bedded chert horizons are dated as Liassic; (iv) the thick turbiditic sequence has been divided into several units of Middle and Late Jurassic age. In the Samail ophiolite: (i) the ages of four tectonic episodes were established from the beginning of oceanic spreading (Albian—Early Cenomanian), to the obduction of the ophiolitic nappe (Campanian).