18: glaciers and glaciation Flashcards
a thick mass of ice originating on land from the compaction and recrystallization of snow
glaciers
large masses of ice
ice sheets
glaciers that flow down mountain valleys
valley glaciers
what forms when glaciers grow into the ocean and spread out to form a wide layer of floating ice
ice shelves
like smaller ice sheets
ice caps
both ice caps and ice sheets may be drained by
outlet glaciers
any sediment of glacial origin is called
glacial drift
two types of glacial drift are
till and stratified drift
which of the glacial drifts is sorted and deposited by meltwater from a glacier?
stratified drift
which of the glacial drifts isn’t sorted, just deposited right there by the ice
tills
an ice sheet that acts as a dam by trapping meltwater or blocking the flow of rivers to create
proglacial lakes
what is lithified till called
tillite