کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4746559 | 1359845 | 2009 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Mise en évidence par charophytes et ostracodes de l'âge Paléocène des dépôts discordants sur les rides anticlinales de la région d'Imilchil (Haut Atlas, Maroc) : conséquences paléogéographiques et structurales
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
فسیل شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
New sedimentological and biostratigraphical data have been obtained from unconformable series (Tasraft Formation) on some intruded anticlines located in the Central High Atlas of Morocco. Our results lead us to contest the previous Middle Jurassic to Middle Cretaceous ages only based on lithostratigraphic similarities. The Tasraft Formation proves to be a syntectonic series characterized by detritic fluvial sediments followed by lacustrine and lagoonal-marine limestones. Ostracods and charophytes found in different levels of the unconformable series indicate Thanetian ages. According to these new stratigraphical data, we can conclude that the main structures of the axial part of the High Atlas (folds, cleavage and exhumation of gabbroic bodies) were settled before the Late Paleocene. Moreover, the occurrence of Paleocene nonmarine beds in the axis of the High Atlas Belt implicates to modify the paleogeographic boundaries of the Atlantic transgressions in the beginning of the Tertiary.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Comptes Rendus Palevol - Volume 8, Issue 1, JanuaryâFebruary 2009, Pages 9-19
Journal: Comptes Rendus Palevol - Volume 8, Issue 1, JanuaryâFebruary 2009, Pages 9-19
نویسندگان
André Charrière, Hamid Haddoumi, Pierre-Olivier Mojon, Jacky Ferrière, Daniel Cuche, Lamia Zili,