atef_abdelaziz

Atef Abdelhamied Elattaar

Professor - Professor in Geology (Paleontology and Stratigraphy)

Faculty of science

Address: Faculty of Science Sohag University

5

Like

السلام عليكم ورحمة الله وبركاته

 أهلا وسهلا بكم

 فى موقعي الشخصي

الاستاذ الدكتور/ عاطف عبد الحميد العطار

أستاذ الحفريات والطبقات


2020-11-28 16:18:06 | Keywords Bentonite . Sohag . Soda activ,
Elshater, A., Elhaddad, A., Elattaar, A. A., Abugharbia, M. and Soliman, W. (2018): Characterisation of a Pliocene Egyptian bentonite from Sohag region for pharmaceutical use. Arabian Journal of Geosciences, 11:385.  https://doi.org/10.1007/s12517-018-3691-3
Abstract This paper aims to prepare purified Na-bentonite with improved properties for its use in the harmaceutical industry. Calcium bentonite from the Sohag region of Egypt was activated with various proportions of Sodium carbonate (2, 3, 5 and 8 wt.%). Additionally, bentonite was purified by sedimentation to eliminate impurities, especially quartz. The results of X-ray diffraction (XRD) and swelling volume ... Read more

2020-11-28 16:13:31 | Keywords Echi., new Hypselaster species,
Elattaar, A. A. (2018): A new Hypselaster species (Echinoidea, Spatangoida) from the Middle Eocene Midawara Formation, Eastern Desert, Egypt. Swiss Journal of Paleontology, Swiss Journal of Palaeontology. https://doi.org/10.1007/s13358-018-0156-y
Abstract The schizasterid echinoid genus Hypselaster Clark, 1917, is recorded for the first time from the Midawara Formation (Middle Eocene, Lutetian), which crops out east Maghagha area, east Nile Valley, Eastern Desert, Egypt. Except for Hypselaster sp. from the Upper Miocene (Messinian) of Morocco, no Hypselaster has been recorded in pan Africa. The material described in the present paper is ... Read more

2020-11-28 16:08:35 | Keywords M Eocene Echinoids Egypt,
Elattaar, A. A. (2018): Middle Eocene Echinoids from El Sheikh Fadl-Ras Gharib stretch, Eastern Desert, Egypt: Systematics, Stratigraphy, Palaeobiogeography. Arabian Journal of Geosciences, 11:303. https://doi.org/10.1007/s12517-018-3636-x
Abstract Twenty-two echinoid species (5 regular and 17 irregular) belonging to 14 genera, 10 families, 5 orders, and 3 subclasses are identified from the Middle Eocene succession cropping out in El Sheikh Fadl-Ras Gharib stretch, Eastern Desert. The echinoid fauna studied herein came from four sections: Gebel ElMehasham, South Gebel ElMehasham, Gebel ElMereir, and Gebel Qarara sections. The studied succession ... Read more

2020-11-28 16:02:26 | Keywords Jacksonaster Red Se, Echinoids,
Elattaar, A. A. (2017): Study of Sea urchin Jacksonaster depressum (L. Agassiz, 1841) (Echinodermata, Echinoidea) from the Northern Bay of Safaga, Red Sea coast, Egypt, as an indicator of the change in the Red Sea Environment. Annals of the Geological Survey of Egypt, Vol. 34 no. ISSN 1110-0435.
One hundred and seventy seven living and dead complete tests of Jacksonaster depressum (L. Agassiz) were collected from different depths ranging between 10 and 52 meters depth from the Northern Bay of Safaga, Red Sea coast. Morphometric measurements were conducted on some specific characters of the skeletons in addition to use the scanning electron microscope in the study on spines, ... Read more

2020-11-28 15:56:07 | Keywords Bivalvia, Eocene, Nile Valley, ,
Elattaar, A. A. & Seddik, A. A. (2017): The Bivalve Fauna of the Eocene Succession of the Maghagha Area, East and West of the Nile Valley, Egypt. Egyptian Journal of Geology, 61:521-568, 3 text-figs, 3 tables, pls. 1-6.
Forty one bivalve species belonging to thirty one genera, twenty two families, sixteen superfamilies, six orders and three subclasses are identified from the Middle Eocene successions exposed in the Maghagha area, east and west of the Nile Valley. The bivalve fauna studied herein came from six sections, five of them are located on the eastern side of the Nile Valley ... Read more