Stratigraphie du Paleozoique de l'extremite nord-ouest du Haut-Atlas occidental (Maroc hercynien); interpretation du cadre sedimentaire du Maroc occidental

Cornée, Jean‐Jacques; Destombes, Jean Paul; Willefert, Solange

doi:10.2113/gssgfbull.iii.2.327

Cited by 20 publications

(6 citation statements)

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“…This platform, extending over other Western European and northeastern American regions (Piqué, 1989(Piqué, , 2001Piqué & Michard, 1989), received mainly siliciclastic sediments during the Cambrian, Ordovician and Silurian. Sediment distribution and locally significant thickness variations were controlled by the moderate extensional tectonic regime that prevailed in North Africa during the Middle Cambrian (Cornée, Destombes & Willefert, 1987;Bernardin et al 1988;Michard et al 2008), by reactivation of pre-existing fault systems (Craig et al 1999), and also through synsedimentary faulting associated with epeirogenic movements (Echikh, 1998).…”

Section: Palaeogeographic Evolution Of the North African Variscan Beltmentioning

confidence: 99%

The Gondwana–Laurussia convergence process: evidence from the Middle Mississippian (Viséan) palynostratigraphic record

2010

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The Gondwana–Laurussia convergence process can be explored by studying the Middle Mississippian (Viséan) palynoflora of northwest Africa. Statistical analysis of the Viséan miospore assemblages reported from Morocco defines two populations, one with clear Laurussian affinity from the northern margin of the Western Meseta, and the other, more Gondwanan in composition, from the southern part of the Western Meseta and Anti-Atlas. Moreover, no transitional assemblages have been described from the region. These palynofloral variations are a consequence of the complex palaeogeography of the northwest African margin, which was controlled by the Variscan Orogeny during Viséan times. Taking into consideration the palynofloral affinity of the miospore assemblages reported throughout the entire North African margin and the Middle East, it is possible to envisage a Late Carboniferous Pangaea amalgamation process initially evolving from the west, while in the east the ocean separating Gondwana and Laurussia persisted as an effective barrier to floral migration.

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Section: Palaeogeographic Evolution Of the North African Variscan Beltmentioning

confidence: 99%

The Gondwana–Laurussia convergence process: evidence from the Middle Mississippian (Viséan) palynostratigraphic record

2010

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“…Volcanic activity within this rather complex area is known in the Haut Atlas, at Sidi-SaYd-Makhou and in the Oued Rhebar area. The geodynamical significance of this structure is not completely elucidated and might correspond either to a passive margin or to a rift (CornCe, Destombes & Willefert 1987).…”

Section: Baked Contact Testmentioning

confidence: 99%

A Cambrian pole for the Moroccan Coastal Meseta

Khattach¹,

Robardet

Perroud

1995

Geophysical Journal International

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S U M M A R Y Middle Cambrian volcanics of Sidi-SaYd-Maiichou, East of El Jadida, western Morocco (158 cores, 23 sites), sampled in two localities North of Sidi-Sa'id-Maiichou, were subjected to progressive alternating field and thermal demagnetization, thermomagnetic cycles, isothermal remanent magnetization acquisition experiments as well as microscopic observations.The magnetic mineralogy of these volcanic rocks is dominated by magnetite and titanomagnetites. The palaeomagnetic analysis has revealed two characteristic components of magnetization: the first (direction D = 300", Z = -31", = 6", pole position at 14"N, 231"E, Sp = 4", Srn = T , palaeolatitude = 16.7"s) is carried by magnetite and yields a positive fold test. It is interpreted, using the results of a baked contact test, as the original magnetization of Middle Cambrian age (520 Ma); the second (direction D = 121", Z=20°, ag5 = 6", pole position at 18"S, 55"E, Sp = 3", Srn = 6") is nearly anti-parallel to the first magnetization but the fold test is not conclusive, and it is interpreted as an overprint that occurred a short time after this volcanism. This study provides the first detailed palaeomagnetic result from Cambrian rocks in the Moroccan Meseta.

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“…The studied Arenig-Llanvirn deposits belong to the successions of: Aït Lahsen in the western High Atlas [3], Tizi-n-Tichka and Imini in the central High Atlas [5,6,16] (Fig. 1).…”

Section: Introductionmentioning

confidence: 99%

L'Arenig–Llanvirn du Haut Atlas occidental et central (Maroc). Environnements sédimentaires, paléogéographie et contrôle de la sédimentation

Chacrone

Hamoumi

2005

Comptes Rendus. Géoscience

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effectuée dans deux bassins différents durant l'Arénig-Llanvirn. Dans le bassin du Haut Atlas occidental s'est développé un delta influencé par vagues et tempêtes, alimenté par une source située à l'emplacement actuel du couloir d'Argana et soumis à des fluctuations eustatiques et à la subsidence. Dans le Haut Atlas central se sont développés des deltas influencés par la marée et les tempêtes épisodiques et des estuaires qui étaient alimentés par des sources situées à l'emplacement actuel des massifs du Siroua et de l'Ouzellagh et soumis à des fluctuations eustatiques et une tectonique verticale.

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Stratigraphie du Paleozoique de l'extremite nord-ouest du Haut-Atlas occidental (Maroc hercynien); interpretation du cadre sedimentaire du Maroc occidental

Cited by 20 publications

References 0 publications

The Gondwana–Laurussia convergence process: evidence from the Middle Mississippian (Viséan) palynostratigraphic record

The Gondwana–Laurussia convergence process: evidence from the Middle Mississippian (Viséan) palynostratigraphic record

A Cambrian pole for the Moroccan Coastal Meseta

L'Arenig–Llanvirn du Haut Atlas occidental et central (Maroc). Environnements sédimentaires, paléogéographie et contrôle de la sédimentation

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