Sami Kotb Ibrahim Aita <br/><br/>
Geology and radioactivityof the phosphate bearing rocks northeastern sinai egypt /  
 جيولوجية واشعاعية الصخور الحاوية للفوسفات شمال شرق سيناء : مصر 
Sami Kotb Ibrahim Aita ; Suppervised Mortada Mourad El Aref , Ibrahim EbrahimElAassy , Ali Abd El Latif Mesaed 
 - Cairo :   Sami Kotb Ibrahim Aita ,   2005 
 - 217P :   ill ;   30cm 
<br/><br/>Thesis (PH.D.) - Cairo University - Faculty Of Science - Department Of Geology 
<br/><br/> The present thesis aims to throw light on the stratigraphy , sedimentology , mineralogy , geochemistry and radioactivity of the phosphorite bearing intervals within the Upper Cretaceous successions in the northeastern SinaiTo achieve these goals , detailed studies were carried out on the phosphorite bearing units of Themed and Sudr formationsThe phosphatic fossiliferous limestone unit of the upper most part of Themed Formation deposited in restricted shallow subtidal to intertidal marine environment 
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<br/><br/><label>Subjects--Index Terms: </label>Depositional environments Diageneses phosphite phosphogenesis Radioactivity