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Upper Cretaceous–lower Paleocene subsurface sequence, Farafra Oasis, Western Desert, Egypt: stratigraphical and paleoenvironmental inferences

  • S. I. Geology of Africa
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Abstract

This work presents details litho-, bio-, and sequence stratigraphy and paleoenvironmental studies on the Upper Cretaceous–lower Paleocene subsurface rocks of Sahl Baraka at Farafra Oasis, Western Desert, Egypt. Lithostratigraphically, two rock units were recognized: the Wadi Hennis (at the base) and the Khoman (at the top) formations. Ten planktonic foraminiferal zones were identified from the Khoman Formation covering the Campanian–Danian chronostratigraphic interval. Using the R-mode hierarchical cluster analyses, four benthonic foraminiferal biofacies (A, B, C, and D) were recognized. The data indicates that the sediments of the Khoman Formation were deposited in marine environments ranging from deep marine (outer neritic–upper bathyal setting) for the lower and middle parts to shallow marine one (middle–outer neritic setting) for the upper part. The Sahl Baraka area was located in a sedimentary basin subjected to three tectonic events during the Late Cretaceous–early Paleocene time which were related to the Syrian Arc Orogeny. These tectonic events interrupted the eustatic sea-level curve. The integrated data led to define three depositional sequences (sequence-1 to sequence-3) separated by three sequence boundaries (SB1–SB3) throughout the Late Cretaceous–early Paleocene time.

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Acknowledgments

The authors are grateful to the Al Masria Drilling Company of Egypt for providing the data for this research. The authors thank the Editor and two anonymous reviewers, for their very useful and critical comments during revision.

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Correspondence to Kamel H. Mahfouz.

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This article is part of the Topical Collection on New Advances and Research Results on the Geology of Africa

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Obaidalla, N.A., El-Sheikh, I., Mahfouz, K.H. et al. Upper Cretaceous–lower Paleocene subsurface sequence, Farafra Oasis, Western Desert, Egypt: stratigraphical and paleoenvironmental inferences. Arab J Geosci 13, 957 (2020). https://doi.org/10.1007/s12517-020-05812-x

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