Contribution to the Sedimentological, paleo environmental and paleogeographical study of Infra-Cenomanian sediments from the South Slope of the Central High Atlas (Morocco).

Document Type : Research Paper

Authors

Cadi Ayyad University, Faculty of Sciences Semlalia, Department of Geology, 2GRNT Laboratory (Geosciences, Geotourism, Natural Hazards, and Remote Sensing). Marrakech, Morocco

Abstract

The sedimentological analysis of the lower Cretaceous red deposits in the Boumalne Dades region (Central High Atlas) presented in this article is based on field observations associated with sedimentological methods (morphoscopy, exoscopy, and mineralogy determination of clays) conducted to investigate the paleo-environment of this study area. The analysis of the surface of the quartz grains with a binocular magnifier and scanning electron microscopy (SEM), allowed us to reconstruct their formation environment. Exoscopic analysis allowed the characterization of a mixture of quartz morphotypes. The results obtained reveal numerous indications of short- and long-distance transport, which reflect different environments (continental to marine environment). The paleo environments of the units revealed by sedimentology are essentially continental with marine influences. Specifically, an alluvial fin is recorded at the base of the Ifezouane Formation at unit 1 and a fluvial meandering medium (unit 2) at the top of the same formation; the deposits of the Ifezouane Formation correspond to a floodplain at the base (unit 3) and a playa at the top (unit 4).

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Article Title [فارسی]

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Articles in Press, Accepted Manuscript
Available Online from 18 May 2022
  • Receive Date: 17 September 2021
  • Revise Date: 07 May 2022
  • Accept Date: 18 May 2022
  • First Publish Date: 18 May 2022