Ammonites sinémuriennes du Haut-Atlas marocain

Détails

Ressource 1Télécharger: 47 - Guex 2008.pdf (10516.60 [Ko])
Etat: Public
Version: Final published version
Licence: CC BY-NC-ND 4.0
ID Serval
serval:BIB_9161F56D3CED
Type
Livre: un livre et son éditeur.
Collection
Publications
Institution
Titre
Ammonites sinémuriennes du Haut-Atlas marocain
Auteur⸱e⸱s
Guex Jean, Rakus Milos, Morard Alain, Quartier-la-Tente Mélanie
Editeur
Université de Lausanne, Institut de Géologie et Paléontologie
Lieu d'édition
Lausanne
ISSN
1015-3578
Statut éditorial
Publié
Date de publication
2008
Peer-reviewed
Oui
Volume
47
Série
Mémoires de Géologie (Lausanne)
Langue
anglais
Nombre de pages
99
Résumé
Three stratigraphic sections, two of them entirely new, were sampled in the central part of the Moroccan High-Atlas, between the localities of Rich, Errachidia and Boudenib. More than 1200 ammonites were collected bed by bed from Upper Sinemurian strata, which permitted the recognition of the Obtusum, Oxynotum and Raricostatum zones. The classical section of Jbel Bou Hamid (Dubar, 1962 ; Rakus, 1994 ; Lachkar et al., 1998 ; Wimsen et al., 2002) was studied in great detail in order to correlate the different sections published in the literature, spanning the interval between the last Arnioceras beds and the base of the Carixian. These data were confirmed by the new sections of Kadoussa (North of Boudenib) and Jbel Tigourine: The latter, located within the Jbel Tagount massif, corresponds to a reefal mass slided in a talus context. Outcrops from the Ziz gorge did not yield Sinemurian ammonites. They represent the meridional platform at that time.
From the paleonlogical point of view, two new taxa were recognized : Dudresnayiceras suzannae and Gleviceras pandai. The relationships between the genera Riparioceras and Gleviceras are clarified. This study provides also numerous qualitative observations and biometrical measurements, which will help the revision of several groups, among which Dudresnayiceras, Paroxynoticeras (and Oxynoticeras) and the Echioceratidae family. Several groups display morphological convergences (trend towards oxycon shells).
Open Access
Oui
Création de la notice
30/10/2012 20:48
Dernière modification de la notice
29/08/2023 6:13
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