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14 terms

Erosional Forces Ch. 8

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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