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22 terms

glaciers, weathering and erosion

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weathering
processes that breakdown rocks in the enviorment near Earths surface
mechanical weathering
processes breaks rock into smaller pieces, does not change chemical makeup
chemical weathering
rock breaks down because chemical reactions with the enviorment
talus
large piles of broken rock fragments caused by temperature changes
exfoliation
peeling of layers
abrasion
mechanism of rocks breaking or wearing down by direct actions of other rocks
karst
of or having to do with limestone topography
hydrolysis
change in minerals caused by chemical reactions with water
acid precipitation
when gases are released hat react with water on clouds to form stronger acids
erosion
the process by whick earth materials move from place to place
deforestation
cutting of trees from an area without replacing then
calve
chunk of ice breaks off leavong a steep cliff of ice
moraine
unsorted pile of rock fragments collected by a glacier
firn
irregularly shaped ice crysals, some air space between them make up snow
sublamation
conversion of solid ice directley to water vapor without passing through the melting phase
striation
groves caused by glaciers scrach softer rock uderneath as it flows
drift
all types of glacial sediment
till
unsorted deposits of glacial sediment
glaciation
evidence of the former presence of glaciers
surge
acceleration of glacial flow rate
confined glaciers
glaciers that are associated with mountains and restricted in their forms by the local topography
unconfined glaciers
cover much of an entire mountain range or even a continent