Erosional Processes Flashcards
Processes
Abrasion
Glacial Plucking
Meltwater Erosion
What does plucking consist of?
Glacial joints widened by erosion
Loose material entrained
What are the primary influences on plucking?
Geology
Ice pressure
Meltwater
Plucking influences - Geology
Ice Pressure
Meltwater
G - Resistance, joints/faults, permeability
IP - Basal pressure causes basal melting + entrainment
M - Pressure of stoss side reduces frictional resistance that
holds rock in place
What is abrasion?
Erosion by individual stones/clasts
Results in rock fragmentation + surface scarring
What are the primary influences on abrasion?
Clasts - Quantity, sharpness, hardness
Lithology - Jointing + overall hardness