Glaciation- EQ3 Flashcards
How do glacial processes contribute to the formation of glacial landforms and landscapes? (14 cards)
4 Glacial processes?
Erosion
Entrainment
Transport
Deposition
7 Upland erosional features
Corries
Aretes (Two corries)
Pyramidal peaks
Glacial troughs
Truncated spurs
Hanging valleys
Ribbon lakes
How does a corrie form?
1) Snow builds up in Nivation hollow; compresses to ice
2) Freeze-thaw weathering, plucking, and abrasion of back wall causes it to steepen and over-deepens bottom
3) Ice eventually melts, possibly forming lake
5 Ice Contact Landforms (due to ice sheet scouring)?
Roches Moutonnées
Whalebacks
Knock and Lochan
Crag and Tail
Striations
5 Glacial subaerial processes?
Freeze-Thaw
Solution/Carbonation
Mass movement
Meltwater erosion
Frost Heave
2 Types of freeze-thaw weathering?
Talus/Scree
Block weathering
3 Reasons for glacial deposition?
Velocity reduced
Overloaded with debris
Ablation increases
4 Ice contact depositional features?
Erratics
Medial Moraines
Lateral Moraines
Recessional Moraines
Terminal Moraines
Drumlins
2 Lowland depositional features?
Lodgement Till
Ablation Till
4 Differences between glacial & fluvioglacial deposits?
Stratification
Sorting
Imbrication
Grading
3 Fluvioglacial ice contact features
Kames
Eskers
Kame Terraces
4 Fluvioglacial proglacial features
Sandurs
Pro-Glacial lakes
Meltwater channels
Kettleholes
6 Periglacial processes
Nivation
Frost Heave
Freeze-thaw weathering
Solifluction
High winds
Meltwater erosion
4 Periglacial Landforms
Ice wedges
Patterned Ground
Pingos
Loess
