Erosion

Er0sion Erosion is the process where weathered rocks are transported and deposited in another located. Can be influenced by: Wind Gravity Water Glaciers

Wind Erosion Wind can pick up, transport and deposit great amounts of sediment Generally only very small particles are transported by wind Humid areas and areas of high vegetation are less susceptible to wind erosion Sediments are bound together

Wind Erosion Wind erodes deserts in 2 ways: Deflation-Small particles such as clay and silt are lifted and removed Abrasion-Rock surfaces are blown off by extreme wind

Gravity Gravity causes erosion when material falls off of cliffs or elevated surfaces Material is very poorly sorted at the base of the cliff (big sediments mixed with small sediments) No time for material to be sorted by size

Water Erosion Streams erode their channels by abrasion and grinding Sediments become dissolved inside the stream (dissolved load) Sediments being carried by a stream can erode the banks as well

Water Erosion Sheet Erosion-Erosion caused by runoff water. Runs along the surface in thin sheet Least detrimental

Water Erosion Rill Erosion-Water flows through very small flow paths down a hill

Water Erosion Gully Erosion-Water flows through a wide channel. Most detrimental

Glacial Erosion When glaciers move they pick up pieces of Earth’s landscape. Till-Sediment deposited by glaciers when they melt Poorly sorted when deposited Glacial erosion is the only type capable of moving boulders