Hydrogenous sediments are produced when dissolved minerals solidify by chemically reacting with seawater. Common examples of hydrogenous sediment are evaporites, manganese nodules and oolites.Continue Reading
Marine sediments are accretions of loose materials transported and deposited on the ocean floor. The different types of marine sediments include hydrogenous, lithogenous, cosmogenous and biogenous. Hydrogenous sediments are valued for their economic importance.
Sedimentation of hydrogenous components may occur where they are deposited, rather than having been transported to the ocean floor. Evaporites are created when ocean water evaporates and crystallizes, which typically occurs in dry, shallow-water aquatic areas.
Halites, gypsum and calcium are primary examples of evaporites. Manganese nodules are mainly composed of iron and manganese oxide, nickel, chromium and cobalt. Oolites are formed from the precipitation of calcium carbonate in seawater.Learn more about Erosion & Weathering
Chemical erosion occurs when water transports dissolved minerals away from their source rocks. It follows chemical weathering, which results from the chemical alteration of rock by water. Chemical erosion is most common with limestone; slightly acidic rainwater dissolves calcium carbonate in the rock and redeposits it, sometimes far away, as in stalagmites and stalactites. Through oxidation, chemical erosion also occurs to some degree with unstable igneous minerals and iron-rich rocks.Full Answer >
Examples of physical weathering are ice wedging, plant activities and rapidly moving water. The process results from environmental effects or movements of the Earth.Full Answer >
Chemical reactions caused by acid in rainwater make certain rocks disintegrate. These reactions cause some minerals in rocks to become soluble and break down, weakening the rocks.Full Answer >
Lateral erosion is one of the three different ways that rivers and streams erode their banks and beds. As the term implies, lateral erosion is the erosion that occurs on the sides, or floodplains, of a river or stream, and it is also referred to as bank erosion. The other two forms of erosion are headward erosion and downcutting erosion.Full Answer >