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Siliceous ooze is a type of biogenic pelagic sediment located on the deep ocean floor. Siliceous oozes are the least common of the deep sea sediments, and make up approximately 15% of the ocean floor. [1] Oozes are defined as sediments which contain at least 30% skeletal remains of pelagic microorganisms. [2]
The two primary types of ooze are siliceous, which is composed primarily of silica (SiO 2), and calcareous or carbonate, which is mostly calcium carbonate (CaCO 3). [1] In an area in which biogenous is the dominant sediment type, the composition of microorganisms in that location determines to which category it is classified.
Red clay, also known as either brown clay or pelagic clay, accumulates in the deepest and most remote areas of the ocean. It covers 38% of the ocean floor and accumulates more slowly than any other sediment type, at only 0.1–0.5 cm/1000 yr. [1] Containing less than 30% biogenic material, it consists of sediment that remains after the dissolution of both calcareous and siliceous biogenic ...
Siliceous ooze is a type of biogenic pelagic sediment located on the deep ocean floor. Siliceous oozes are the least common of the deep sea sediments, and make up approximately 15% of the ocean floor. [5] Oozes are defined as sediments which contain at least 30% skeletal remains of pelagic microorganisms. [6]
Skeleton fragments from siliceous organisms are subject to recrystallization and cementation. [37] Chert is the main fate of buried siliceous ooze and permanently removes silica from the oceanic silica cycle. The siliceous ooze is eventually subducted under the crust and metamorphosed in the upper mantle. [39]
Siliceous ooze is a type of biogenic pelagic sediment located on the deep ocean floor. Siliceous oozes are the least common of the deep sea sediments, and make up approximately 15% of the ocean floor. [40] Oozes are defined as sediments which contain at least 30% skeletal remains of pelagic microorganisms. [41]
Southern Ocean sediments are a major sink for biogenic silica (50-75% of the oceanic total of 4.5 × 10 14 g SiO 2 yr −1; DeMaster, 1981), but only a minor sink for organic carbon (<1% of the oceanic 2 × 10 14 g of organic C yr −1). These relatively high rates of biogenic silica accumulation in the Southern Ocean sediments (predominantly ...
The terrace is an elliptic flat area measuring in diameter 180 x 90 m and counting a total surface of approximately 1.1 ha, with the highest elevation recorded 422 m (above sea level). The first archaeological excavations were carried out in several seasons; 1961–1963, 1978 and again after two and half decades, the Archaeological Institute of ...