turbidity currents

См. также в других словарях:

• Turbidity-Currents —   [təː bɪdɪtɪ kʌrənts, englisch], die Suspensionsströme …   Universal-Lexikon

• Turbidity current — A turbidity current or density current is a current of rapidly moving, sediment laden water moving down a slope through air, water, or another fluid. The current moves because it has a higher density and turbidity than the fluid through which it… …   Wikipedia

• turbidity current — Geol. a turbid, dense current of sediments in suspension moving along the slope and bottom of a lake or ocean. Also called density current. * * * Underwater current of abrasive sediments. Such currents appear to be relatively short lived,… …   Universalium

• Subsurface currents — are oceanic currents that flow beneath and usually independently of surface currents. Most are very deep, and as such, very little is known about these currents.They include a broad variety of currents, from thermohaline currents to turbidity… …   Wikipedia

• sedimentary rock — Rock formed at or near the Earth s surface by the accumulation and lithification of fragments of preexisting rocks or by precipitation from solution at normal surface temperatures. Sedimentary rocks can be formed only where sediments are… …   Universalium

• density current — Geol., Oceanog. See turbidity current. * * * Any current in either a liquid or a gas that is kept in motion by the force of gravity acting on small differences in density. A density difference can exist between two fluids or between different… …   Universalium

• Atlantic Ocean — an ocean bounded by North America and South America in the Western Hemisphere and by Europe and Africa in the Eastern Hemisphere. ab. 31,530,000 sq. mi. (81,663,000 sq. km); with connecting seas ab. 41,000,000 sq. mi. (106,100,000 sq. km);… …   Universalium

• Submarine landslide — Submarine landslides are marine landslides that transport sediment across the continental shelf and into the deep ocean. A submarine landslide is initiated when the downwards driving stress (gravity and other factors) exceeds the resisting stress …   Wikipedia

• Submarine canyon — A submarine canyon is a steep sided valley on the sea floor of the continental slope. Many submarine canyons are found as extensions to large rivers; however there are some that have no such association. Canyons cutting the continental slopes… …   Wikipedia

• Dropstone — Examples of dropstones from the Eocene, when it has been suggested that there were no ice sheets.[1] Dropstones are isolated fragments of rock found within finer grained water deposited sedimentary rocks. They range in size from small pebbles to… …   Wikipedia

• marine sediment — Any deposit of insoluble material, primarily rock and soil particles, transported from land areas to the ocean by wind, ice, and rivers, as well as the remains of marine organisms, products of submarine volcanic activity, and chemical… …   Universalium