Author: L.W. LeRoy
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The Maqfi section outcrops in a conspicuous escarpment 400 km. S. 41° 00' W. of Cairo, and 69 km. N. 65° 00' E. of the village of Qasr Farafra, Farafra Oasis, Egypt. Nineteen species of Foraminifera from the Upper Cretaceous and 112 species from the Lower Tertiary of this section are recorded and illustrated. Forty new species have been systematically described. Eight species have been given letter designations because incomplete data do not permit identification or naming. The results of this analysis should serve as control for future micropaleontologic and stratigraphic investigations of the Western Desert of Egypt and adjacent areas of North Africa. The Maqfi section involves an Upper Cretaceous unit (A) and four Lower Tertiary units (IV, III, II, and I). The lowest exposed Cretaceous strata (Unit A) consist of 150 feet of white, massive chalk and chalky limestone containing abundant Globotruncana and Gumbelina. The lowest Tertiary strata (Unit IV) in the section attains a thickness of 72 feet, consists of medium-gray, moderately bedded, calcareous shale to impure limestone, and is paleontologically identified by an abundance of Globorotalia velascoensis and by the absence of Globotruncana and Gumbelina. Unit IV is separated from the overlying Unit III by an erosional surface and by a major paleontologic break. Its lower boundary, marking the base of the Tertiary as assumed in this paper, is believed to involve disconformable relationships with Unit A of the Cretaceous…
Published: 2/27/1953
Pages: 73
Product Category: Memoirs