. Bulletin of the British Museum (Natural History), Geology. Graptoliles du Llandoverien moyen Membre inferieur greso-conglomeratique W^^^^^^!^PH^ Membre moyen argileux d'EI Kseib. •' Membre superieur des gres du Ksar d'Ougarta Formation des argiles de I'Oued Ali. Formation greso-conglomeratique du Djebel Serraf 0 5 10 15 20 km, II11' Ph LEGRAND . 1967-1981 Fig. 3 Section in the vicinity of the Ordovician-Silurian boundary at El Kseib, Ougarta range, Algeria.. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloratio
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