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dsdp13pt2_44_3.pdf

🔗 Source: deepseadrilling.org

📊 Size: 435 KB

📄 Pages: 2 pages

⬇️ Downloads: 103

Summary

The Mediterranean Sea experienced significant changes in salinity and level during the Miocene and Pliocene epochs. The Messinian suite indicates varying salinity conditions, while the Plaisancian suite marks a sudden transgression due to the opening of the Gibraltar strait. This event led to the formation of deep estuaries in river valleys, including the Nile, which was overdeepened by 1-1.5 km. The Pliocene and Pleistocene fauna of the Mediterranean is characterized by a poor abyssal fauna, low endemism, and predominantly Lusitanian origin of littoral and sublittoral forms. In the Nile Valley, marine deposits of Pliocene age have been found at considerable depths, indicating a deep estuary that penetrated upstream into the Sudan. The geological cross-sections of the Upper Nile Valley show a sequence of Pliocene and Pleistocene deposits, including marine, estuarine, and alluvial sediments.

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Description

The Mediterranean Sea experienced significant changes in salinity and level during the Miocene and Pliocene epochs.

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File Format: PDF
File Size: 435 KB
Pages: 2
Language: EN
Total Downloads: 103
Last Updated: 7 hours ago

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