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- W1010686282 abstract "The Tindouf Basin is a large syncline which crosses the border between NW Algeria and S Morocco, south of the Anti-Atlas Mountains. Four formations have been distinguished in the Carboniferous succession in southern Morocco (CONRAD 1972; CONRAD in WAGNER et al. 1985): Djebel Tazout Sandstones, Betaina Formation, Djebel Ouarkziz Formation and Betana Beds. The Djebel Ouarkziz Formation is composed mainly of shales with interbedded limestones, dolomites and thin sandstone beds. It has been dated as upper Visean-Serpukhovian by means of foraminifers (MAMET et al. 1966). Although some of the limestone beds are quite thin (less than 1 m in some cases), they are very persistent and can be followed along strike East-West for tens of kilometres. We have identified 19 limestone beds in two main sections; one logged along the road from Assa to Zag (Fig. 1), and the other in the Tisguiz-Rems Valley, 15 km to the east. The first coral beds occur in the upper part of the Betaina Formation, which is mainly siliciclastic, but shows some thin marly beds in its upper part. Those marly beds provided large in situ colonies of Siphonodendron sp. (-A coral bed, Fig. 2). This species shows similar dimensions to S. irregulare, but the number of major septa is similar to S. sociale. Near the top of the Betaina Formation, several beds containing corals have been identified (coral beds A-D). The coral assemblage here is dominated by Siphonodendron martini and S. sociale. The next assemblages are more diverse, containing both solitary (Axophyllum sp. and Palaeosmilia murchisoni) and colonial corals (Siphonodendron martini and syringoporoids, coral beds E and F)." @default.
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- W1010686282 date "2011-01-01" @default.
- W1010686282 modified "2023-09-23" @default.
- W1010686282 title "An upper Viséan (Asbian-Brigantian) coral succession at Djebel Ouarkziz (northern Tindouf Basin, Morocco)" @default.
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