Journal of Petroleum Geology, Vol.4, No.2, pp.163-176, 1981

©Copyright 2000 Scientific Press, Ltd.

FURTHER GEOLOGIC STUDY ON THE TRIASSIC FORMATIONS OF NORTH-CENTRAL ALGERIA WITH SPECIAL EMPHASIS ON HALOKINESIS

Fakhry A. Assaad*

*Cité Sonatrach, Boumerdas, Bat. 21/B3, Alger, Algeria.

Abstract

Up-to-date lithostratigraphic classifications of the Triassic detritals of the Upper Triassic and Lower Jurassic evaporitic series have been made in North-Central AIgeria. It is believed that the formation of the Lower Triassic fluvio-deltaic deposits and the principal Upper Trias-Lias evaporites may be explained in terms of plate tectonics. Correlation of the Triassic formations were found possible between the two different tectonic units known in Algeria. The Epihercynian and Pre-cambrian platforms attained their main tectonic features after the Early Alpine "Post-Liassic" orogenic movements; whereas the successive southerly migrations of the Equator during Later Triassic time led to the formation of several lagoons.