Abstract

Abstract With slow retreat of the Aptian sea from the Oulad Naiel mountain region, Algeria, lagoonal- marine beds graded into continental Albian (Cretaceous) deposits. The transitional zone contains remains of charophytes; these plants, considered lacustrine, are here associated with foraminifers, showing that they had become adapted to a brackish-water environment like the modern characeans. The marshy emergent coast of that time was comparable to the Cape Hatteras region of today. The charophyte flora is described.

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