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Upper Silurian to Middle Devonian conodont faunas from the Rabat-Tiflet area (northwestern Moroccan Meseta) Benfrika, E.M.; Bultynck, P.; El Hassani, A. (2007). Upper Silurian to Middle Devonian conodont faunas from the Rabat-Tiflet area (northwestern Moroccan Meseta). Geol. Q. 51(4): 393-406 In: Geological Quarterly. Polish Geological Institute: Warsaw. ISSN 1641-7291; e-ISSN 2082-5099

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Trefwoorden

Geological time > Phanerozoic > Paleozoic > Palaeozoic > Devonian > Devonian, Middle > Givetian Conodonta Africa, Morocco [Marine Regions] Marien/Kust

Author keywords

Morocco; Meseta; biostratigraphy; Pridoli-middle Givetian; conodonts

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Auteurs		Top
Benfrika, E.M. Bultynck, P. El Hassani, A.

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Abstract

Conodont faunas are generally sparse in Pridoli to middle Givetian deposits from the Rabat-Tiflet area in the northwestern Moroccan Meseta. The Pridoli and Lochkovian rocks consist of dark platy limestones alternating with dark shales containing graptolites in some levels. In the overlying part of the succession carbonate rocks predominate with the development of reefoid limestones in the lower Givetian. The eosteinhornensis, sulcatus, dehiscens vel kitabicus, laticostatus/inversus, partitus, ensensis, hemiansatus, timorensis and rhenanus/varcus zones have been recognized by occurrence of the conodont index species. The first appearance of Belodella devonica, occurring together with the graptolite Monograptus uniformis is used as a regional index species for the base of the Devonian. The age of some levels in the succession were previously dated by graptolites, dacryoconarids and rare goniatites.

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