Quick Search:    advanced search

GSW Home   GeoRef Home   My GSW Alerts   Contact GSW   About GSW   Journals List   Help

This Article Figures Only Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via HighWire Citing Articles via Google Scholar Google Scholar Articles by IBRAHIM, M. I.A. Search for Related Content GeoRef GeoRef Citation

NEW ANGIOSPERM POLLEN FROM THE UPPER BARREMIAN–APTIAN OF THE WESTERN DESERT, EGYPT

Department of Environmental Sciences, Faculty of Science, University of Alexandria, Moharam Bey 21511, Alexandria, Egypt, e-mail: mohamedibrahim59{at}hotmail.com

The Lower Cretaceous Alam El Bueib and Alamein formations in the Ghazalat-1 (GTX-1) well, Western Desert, Egypt, consist of marginal marine siliciclastic sediments, overlain by the Aptian evaporites (dolomite of the upper Alamein Formation). Angiosperm species diversity is reasonably high, and account for 8.0–22.0% of the total palynomorphs. Most of these species might belong to monosulcate, zonasulculate, and inaperturate pollen. The genus Afropollis is emended herein to include forms with monosulcoid aperture. The following two new subspecies and seven new species are described: Afropollis operculatus operculatus, Afropollis operculatus microreticulatus subsp. nov., Afropollis schrankii sp. nov., Arecipites microfoveolatus sp. nov., Retimonocolpites bueibensis sp. nov., Retimonocolpites ghazalii sp. nov., Stellatopollis dejaxii sp. nov., Stellatopollis doylei sp. nov. and Stellatopollis limai sp. nov. In addition, one new combination is proposed: Arecipites pereensis (Juhász and Góczán) comb. nov.

Three palynomorph assemblages (A1–A3) are assigned to the upper Barremian and lower–middle Aptian. These assemblages show close correlation and similarity with the palynozones C-VI, C-VIIa and C-VIIc of the "Cocobeach System", West Africa and Zone I of the Potomac Group, USA. Sediments of the Alam El Bueib and basal Alamein formations accumulated in a marginal shallow marine environment under arid to semiarid climatic conditions.

This article has been cited by other articles:

				P.A. Hochuli, U. Heimhofer, and H. Weissert Timing of early angiosperm radiation: recalibrating the classical succession Journal of the Geological Society, July 1, 2006; 163(4): 587 - 594. [Abstract] [Full Text] [PDF]