ON THE STRATIGRAPHY AND LITHOFACIES
OF THE PLEISTOCENE SEDIMENTS AT GIZA
PYRAMIDAL AREA, CAIRO, EGYPT.
ABDEL MONIEM A. MAHMOUD* and MOHAMED A. HAMDAN**
* Ain Shams University ** Cairo University
|
The Pleistocene sediments of Giza Pyramid Plateau are subdivided into three rock units, these are from older to younger, Kasr el Basil; Abbassia; and Kafr el Gebel formations. The Kasr el Basil Formation (Early Pleistocene) is exposed on an old sand quarry near Mena House and attains about 30m in thickness. It consists of cross bedded gravelly quartzose sands. These deposits were deposited by low sinuosity braided river of local Egyptian origin. The Abbassia Formation (Middle Pleistocene), is exposed on the southern part of the plateau around Sahara City. It is composed of lenticular bedded polygenticgravel with abundant cross bedded quartzose sand lens. These deposits were deposited in a braidplain, which was wide and shallow. The Abbassia braidplain was local Egyptian river system, which brought its water from the Eastern Desert. The Kafr el Gebel Formation (Late Pleistocene), exposed in the southern part of the study area, and consist of about 20 m thick section of laterally accreted sand bodies composed of cross bedded quartzose sands with gavel layers. These deposits were formed in a channel of meander river of African origin.
|
|