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A revision of the upper part of the Saq Formation and Hanadir Shale (lower Ordovician) of Saudi Arabia

Published online by Cambridge University Press:  01 May 2009

A. A. El-Khayal  and
M. Romano
A. A. El-Khayal
Affiliation:
Department of Geology, King Saud University, Riyadh, Saudi Arabia
M. Romano
Affiliation:
Department of Geology, University of Sheffield, Beaumont Building, Brook Hill, Sheffield S3 7HF, U.K.
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Abstract

The previously termed Hanadir Shale of Saudi Arabia is described and re-defined as the Hanadir Formation. At the type locality of Al Hanadir the unit is probably entirely of Llanvirn age while further north shelly faunas of possible Llandeilo age occur in the upper part. Trace fossil assemblages with abundant cruzianids (C. furcifera, C. rugosa, C. goldfussi), Pelecypodichnus, Didymaulichnus and Diplichnites indicate an Arenig age for beds in the upper part of the underlying Saq Formation, while the top of this unit yielded hitherto unrecorded pendent and biserial scandent graptolites, a sparse shelly fauna of lingulacean brachiopods, Neseuretus sp. and the trace fossils Cruziana? imbricata and Phycodes.

Type
Articles
Information
Geological Magazine , Volume 125 , Issue 2 , March 1988 , pp. 161 - 174
Copyright
Copyright © Cambridge University Press 1988

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