Where does Hydrogenous sediment come from?
Hydrogenous sediments come from chemical reactions in the water. Cosmogenous sediments come from space, filtering in through the atmosphere or carried to Earth on meteorites.
What is the origin of marine sediments?
Marine sediment is a mixture of material deposited on the seafloor that originated from the erosion of continents, volcanism, biological productivity, hydrothermal vents, and/or cosmic debris.
Where can Cosmogenous sediments be found?
These kinds of sediments are found commonly near hydrothermal vents. Cosmogenous sediments are probably the most interesting of all four kinds of sediment because they are alien in nature. These kinds of sediments are carried to earth on meteorites or asteroids.
Where are pelagic sediments found?
Pelagic sediments are the deposits of the open ocean that accumulate on the ocean floor protected from terrestrial influence (see Hüneke and Henrich, 2011, this volume). They are not necessarily deep but are usually located at great distance from the continents.
Where is Terrigenous found?
Terrigenous sediment, deep-sea sediment transported to the oceans by rivers and wind from land sources. Terrigeneous sediments that reach the continental shelf are often stored in submarine canyons on the continental slope. Turbidity currents carry these sediments down into the deep sea.
What is the best way to produce sorted sediments?
Wind, on the other hand, is the best sorter of sediment, because it can usually only transport sediment that ranges in size from sand to clay. Occasional variation in wind speed during transport serves to further sort out these sediment sizes.
What do you think a poorly sorted sediment looks like?
Poorly-sorted sediments have grains of varying sizes, and are evidence of sediments that have been deposited fairly close to the source area, i.e., have not undergone much transport. Other examples of angular, poorly-sorted rocks are breccia and arkose sandstone.
What are the two processes of sedimentation?
It consists of two processes which always act together: fragmentation (known as mechanical or physical weathering) decay (known as chemical weathering)
What is the basic principle of sedimentation?
Sedimentation principle. In a solution, particles whose density is higher than that of the solvent sink (sediment), and particles that are lighter than it float to the top. The greater the difference in density, the faster they move.