On Certain Phenomena Belonging to the Close of the Last Geological Period Micro
On Certain Phenomena Belonging to the Close of the Last Geological Period Micro
Joseph Prestwich
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Though there are Raised Beaches and high- level river terraces in Egypt showing considerable changes of level, there is no distinct evidence of the country having been submerged at the period in question. Had any such evidence existed, it could hardly have escaped the notice of the many geologists who have explored that country. The long lines of limestone escarpments, and the great extent of sec- tions exposed in quarries, could hardly have failed to have revealed such conspicuous objects as O...ssiferous fissures and Osseous breccias had there been any. One* of the higher Raised Beaches was found by Sir J. W. Dawson on the Mokattan hill, near Cairo, at a height of about 200 ft. Above the sea-level. It contained species of Ostrea, Pecten, Terebratula, Lithodomus, and Balanus. 1 The old river terraces above Assouan are about 120 ft. Above the level of the Nile. Dr. Leith Adams states 2 that they contain several species of freshwater shells, and amongst them the Corbicula (Cyrena) Jluminalis so common in pre-glacial and post-glacial times in England, but now confined to Thibet and some other parts of Asia.
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