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Erosion

a process that wears away surface materials and moves them from one place to another

Deposition

when sediments are eroded, they are not lost from Earth they are just relocated

Mass Movement

any type of erosion that happens as gravity moves materials downslope

Slump

when a mass of materials slips down along a curved surface

Creep

occurs when sediments slowly shift their positions downhill

Glacier

a large mass of ice and snow moving on land under its own weight

Plucking

pieces of rock are lifted out by the ice

Till

as ice retreats, a jumble of boulders, sand, clay, and silt is left behind. The mixture of different-sized sediments is called till

Moraine

a big ridge of material piles up that looks as though it has been pushed along by a bulldozer

outwash

material deposited by the meltwater from a glacier, most often beyond the end of the glacier

Deflation

when wind blows across loose sediment, removing small particles such as silt and sand

Abrasion

when windblown sediment strikes rock, the surface of the rock gets scraped and worn away

Loess

Large deposits of windblown sediments

Dune

a mound of sediments drifted by the wind

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