Abstract
El-Guss Abu Said plateau lies on the western scarp of Farafra Oasis. The studied succession consists of Esna Formation (shale) at the base, which is overlain by well-bedded alveoline marl (Nusf Formation) with occasional limestone ledges rich in nummulitic fauna. This unit ends with varved-like thin beds of marl and limestone before it is truncated by limestone unit of the Farafra Formation (limestone). Esna Formation is deep shelf facies as it is rich in planktonic foraminifera that assign it to Early Eocene in age. The first occurrence of nummulitic fauna was recorded in the lower part of Nusf Formation. Two species of Nummulites were identified; Nummulites solitarius de la Harpe 1883 and Nummulites fraasi de la Harpe 1883. These two species date this unit to Early Eocene time (Ypresian) that ranges from SBZ5 to SBZ6 of the standard Serra-Kiel et al., 1998, shallow benthic zonal scheme. The shift from deep shelf facies of Esna Formation to the carbonate platform facies of Nusf and Farafra Formations could point to a tectonic uplift that occurred in Early Eocene time.
Similar content being viewed by others
References
Beadnell HJL (1905) The relation of the Eocene and cretaceous systems in the Esna–Aswan reach of the Nile Valley. Quarterly Journal of the Geological Society of London, January 1905(61):667–678
Blainville HM (1827) Manuel de malacology et de conhylioiogie (1825). Paris.F.G. In: Levrault
Blondeau A (1972) Les Nummulites. De I’enseignement a la recherche. Paris, Editions Vuibert, Sciences de la Terre, 254 pp
Boukhary MA, Bassiouni A, Hussein-Kamel Y (1995) Nummulites luterbacheri n. sp., unexpected large Nummulites from Basal Ilerdian (Early Eocene) from El Quss Abu Said, Farafra Oasis, Western Desert, Egypt. Rev Micropaleontol 38:285–298
Boukhary MA, Hussein–Kamel Y, Abdelmalik W, Besada M (2011) Ypresian nummulites from the Nile Valley and the Western Desert of Egypt: their systematic and biostratigraphic significance
De La Harpe (1883) Monographie der in Agypten und der libyschen wuste vor kommenden Nummuliten. Paleontographica 30:155–216
Faris M, Strougo A (1998) The lower Libyan in Farafra (Western Desert) and Luxor (Nile Valley): correlation by calcareous nannofossils. Middle East Research Center, Ain Shams University, Earth Science Series 12:137–156
Faris M, Obaidalla NA, Zaky AS (2013) Later Cretaceous–Lower Eocene planktonic foraminifera and calcareous nannofossil biostratigraphy in the Farafra Oasis, Western Desert of Egypt. 7th International Conference on the Geology of Africa, Assiut University, 24–26 Nov.
Haggag M, Strougo A, Luterbacher H, Wieldandt U (2010) Palaeocene-Early Eocene planktic foraminifera of the Farfra Oasis, Egypt. N Jb Geol Paläont Abh 256(2):161–182
Ismail AA, Daghriri MI (2015) Maastrichtian-Early Eocene benthonic foraminifera from Northern Gunna, Farafra Oasis, Egypt. Egypt J Geol 59(2015):295–311
Lamarck JB (1801) Système des animaux sans vertèbres, Paris
Leroy LW (1953) Biostratigraphy of the Maqfi section, Egypt. Geol Soc Amer Mem 54:1–73
Loeblich AR, Tappan H (1987) Foraminiferal genera and their classification. Van Nostrand Reinhold company, New York 970 pp
Said R (1990) The geology of Egypt. Balkema, Rotterdam
Said R, Kerdany MT (1961) The geology and micropaleontology of the Farafra Oasis, Egypt. Micropaleontology 7:317–336
Schaub H (1951) Stratigraphie und Paleontologie des Schlierenflyschesmit besonderer Berücksichtigung der paleozaenen und untereocaenen Nummuliten und Assilinen. Mémoire Societe paleontographica suisse 68:1–222
Schaub H (1981) Nummulites et Assilines de La Tethys Palaéogene, Taxinomie, phylogénese et biostratigraphie. Mém. Schweiz.Palaontol. Abhandlungen, V.104, text 236 p.; Vol. 105, Atlas I ,Vol.106. Atlas II
Serra-Kiel J, Hottinger L, Caus E, Drobne K, Ferrandez C, Jauhri AK, Pavlovec R, Pignatti J, Samso JM, Schaub H, Sirel E, Strougo A, Tam-Bareau Y, Tosquella J, Zakrevskaya E (1998) Larger foraminiferal biostratigraphy of the Tethyan Paleocene and Eocene. Bulletin Societe geologique de France 169(2):281–299
Strougo A (1996) The upper Libyan stratigraphic succession in Farafra and Nile Valley: a new correlation. M.E.R.C. Ain Shams Univ Earth Sci Ser 10:53–74
Tosquella J, Serra-Kiel J (1998) Los nummulítidos (Nummulites y Assilina) del Paleoceno-Superior- Eoceno Inferior de la Cuenca Pirenaica. Sistemática Acta Geologica Hispanica 31:37–159
Youssef M1, Abdel-Aziz W (1971) Biostratigraphy of the Upper Cretaceous-Lower Tertiary in Farafra Oasis. libyan Desert. Egypl.- Symp. Gecl, libya, Tripoli, 1971; Pee. Sci Univ Libya,p. 227–249
Zittel KA (1883) Beitrage zur Geologie und Palaontologie derLibyschen Wüste und der angrenzenden Gebiete von Aegypten. Palaeontolographica, n.s., 30(1): 1–147; 30(2): 1–238
Acknowledgements
The authors express their sincere thanks and appreciation to Dr. Gamal Salama, Faculty of Education Ain Shams University, and Dr. Kamel Mahfouz and Mr. Eslam El-Sheikh, El-Azhar University, Assiut Branch, for their kind help in the field work.
Author information
Authors and Affiliations
Corresponding author
Additional information
This article is part of the Topical Collection on New Advances and Research results on the Geology of Africa
Rights and permissions
About this article
Cite this article
Shreif, A., Boukhary, M., Abul-Nasr, R.A. et al. Ypresian Nummulites and their stratigraphic significance from El-Guss Abu Said plateau, Farafra Oasis, Western Desert, Egypt. Arab J Geosci 12, 72 (2019). https://doi.org/10.1007/s12517-018-4195-x
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s12517-018-4195-x