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Marine sediment, or ocean sediment, or seafloor sediment, are deposits of insoluble particles that have accumulated on the seafloor.These particles either have their origins in soil and rocks and have been transported from the land to the sea, mainly by rivers but also by dust carried by wind and by the flow of glaciers into the sea, or they are biogenic deposits from marine organisms or from ...
Sapropels have been recorded in the Mediterranean sediments since the closure of the Eastern Tethys Ocean 13.5 million years ago. The formation of sapropel events in the Mediterranean Sea occurs approximately every 21,000 years and last between 3,000 and 5,000 years. The first identification of these events occurred in the mid-20th century.
The Mediterranean-Atlantic strait closed tight time and time again, and the Mediterranean Sea, for the first time and then repeatedly, partially desiccated. The basin was finally isolated from the Atlantic Ocean for a longer period, between 5.59 and 5.33 million years ago, resulting in a large or smaller (depending on the scientific model ...
This ultimately shifts submarine canyons and sediment deposition locations. One example of this is located in the western part of the Gulf of Cadiz, where the ocean current leaving the Mediterranean Sea (also known as the Mediterranean outflow water) pushes turbidity currents westward. This has changed the shape of submarine valleys and canyons ...
L'Atalante basin is a hypersaline brine lake at the bottom of the Mediterranean Sea about 192 km (119 mi) west of the island of Crete. [1] It is named for the French L'Atalante, [2] one of the oceanographic research vessels involved in its discovery in 1993. [3]
Pelagic sediment or pelagite is a fine-grained sediment that accumulates as the result of the settling of particles to the floor of the open ocean, far from land. These particles consist primarily of either the microscopic, calcareous or siliceous shells of phytoplankton or zooplankton; clay-size siliciclastic sediment; or some mixture of these.
Black shales and organic-rich sediments of the Atlantic Ocean: Reconstruction of depositional environments at DSDP Sites 530, 532 and 603 Kay-Christian Emeis is a German geologist and an academic. He is a retired professor in the Department of Earth Sciences at Universität Hamburg (UHH) in Germany.
Ocean-floor basalts – typically seamounts scraped off the subducting plate; Pelagic sediments – typically immediately overlying oceanic crust of the subducting plate; Trench sediments – typically turbidites that may be derived from: Oceanic, volcanic island arc; Continental volcanic arc and cordilleran orogen