Key Words - Ice Flashcards
glacier
a slow moving mass of ice formed by accumulation of snow on mountains
freeze-thaw weathering
repeated cycles of freezing and thawing that can make cracks in bigger rocks
abrasion
the sandpaper effect of glacial ice scouring a valley floor and sides
plucking
rocks are pulled from the valley floor as water freezes them to a glacier
rotational slip
slippage of ice along a curved surface
bulldozing
the pushing of deposited sediment by the snout of the glacier as it advances
till
sediment deposited by a glacier that is unsorted and angular
outwash
sediment deposited by meltwater that is well sorted and rounded in front of a glacier
corrie
armchair shaped hollow in the mountains life formed by glacial erosion, rotation slip and freeze-thaw weathering
this is where the valley glacier begins
arete
a sharp, knife edged ridge formed between 2 corries cutting back by processed of erosion and freeze-thaw
pyramidal peak
where several corries cut back to meet a central point, the mountain takes the form of a steep pyramid
truncated spur
a former river valley spur which had been sliced off by valley glacier, forming steep edges
glacial trough
wide, steep sided valley eroded by a glacier
ribbon lake
a long narrow lake in the bottom of a glacial trough
hanging valley
a tributary glacial trough on the side of a main valley often with a waterfall
