Final Exam New Content Flashcards
(19 cards)
Acrete
knife edge ridge, formed by two cirques or two valley glaciers that have eroded one another
Basal Sliding
a way glaciers move, also known as basal slip, basal means forming or belonging to bottom layer. Significant quantities of meltwater forms at glacier base. Water decreases friction, ice slides along substrate
Calving
ice chunks that break off from edge of glacier, ice shelf or iceberg and fall into body of water
Cirque
fill mountain top bowls, type of mountain glacier
Drumlin
long aligned hills of molded tills.
End Moraine
debris at the toe of a glacier
Erratic
boulders dropped by glacial ice
Esker
long sinuous ridges of and and gravel. They form as meltwater channels within or below ice. Channel sediment is released when the ice melts
Firn
type of compacted snow that forms on glaciers, older than regular snow but hasn’t become glacial ice yet
Fjord – u shapes glacial troughs flooded by the sea
Hanging Valley
the intersection of a tributary glacier with a trunk glacier. Trunk glacier incises deeper into bedrock. Troughs have different elevations, waterfall results
Kettle Lake
form from stranded ice blocks in ground moraine
Lateral Moraine
forms along the flank of a valley glacier
Medial Moraine
mid-ice moraine from merging of lateral moraines
Piedmont Glacier
spread out at the end of a valley, type of mountain glacier
Sublimation
process when solid changes to a gas without becoming a liquid, common with ice
Tarn
result of the ice melting in a cirques
Terminal Moraine
form at the farthest edge of flow
U-Shaped Valle
glacial erosion creates a distinctive trough
V-Shaped Valley
narrow steep sided valley formed by the erosive power of a river
