Search results
Results from the WOW.Com Content Network
A diagram of various depositional environments. In geology, depositional environment or sedimentary environment describes the combination of physical, chemical, and biological processes associated with the deposition of a particular type of sediment and, therefore, the rock types that will be formed after lithification, if the sediment is preserved in the rock record.
Sketch showing the main glacio-lacustrine (or glacio-marine) deposits & depositional processes. Sediments deposited into lakes that have come from glaciers are called glaciolacustrine deposits. In some European geological traditions, the term limnoglacial is used. These lakes include ice margin lakes or other types formed from glacial erosion ...
Later, when the glaciers retreated leaving behind their freight of crushed rock and sand (glacial drift), they created characteristic depositional landforms. Depositional landforms are often made of glacial till , which is composed of unsorted sediments (some quite large, others small) that were eroded, carried, and deposited by the glacier ...
The depositional slip-off slope is on the left and a small river cliff on the right. River Ashes Hollow, UK. Schematic cross section of a meandering river channel showing slip-off slope formation. A slip-off slope is a depositional landform that occurs on the inside convex bank of a meandering river.
Cut bank erosion and point bar deposition as seen on the Powder River in Montana. A point bar is a depositional feature made of alluvium that accumulates on the inside bend of streams and rivers below the slip-off slope. Point bars are found in abundance in mature or meandering streams.
In geography, a glacial deposit is a glacial landform, composed of sediments of varying size, from clay through sand to boulders, deposited in the landscape when the glacier withdraws. Subcategories This category has the following 3 subcategories, out of 3 total.
Depositional landforms grow when sediment is deposited into an area faster than it is removed. These landforms grow from snow, sand, and/or dust in areas where wind patterns trap particles. For example, the Great Sand Dunes in Colorado grow as sand blown from a wide plain is deposited against the edge of the Sangre de Cristo mountains.
Deposition is the geological process in which sediments, soil and rocks are added to a landform or landmass. Wind, ice, water, and gravity transport previously weathered surface material, which, at the loss of enough kinetic energy in the fluid, is deposited, building up layers of sediment.