الفهرس 
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Abstract
In Thesis, The Most Common Clayey Exposures In Egypt Have Been Investigated. Their Textural Characteristics, Mineralogical And Chemical Compositions Are Determined. In General, Studies Of Sediments Of Various Age And Lithology Could Establish A Frame - Work For The Lateral Variation Of Clay Mineral Assemblages That Can Serve A Useful Tool For Studying The Directional Properties Of Sediments.