glaciers, weathering and erosion

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22 terms

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

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