Processes And Landforms Of Deposition

Question 1

Sediment Cascade

Answer 1

Passive transport. Debris deposited on top of glacier, above equilibrium line gets sucked in, transported englacially.

Subrounded - subangular.

Dropped below equilibrium line stays on top of glacier. Angular - sub angular.

Question 2

Active transport

Answer 2

Regelation and supercooling

Supercooling - thick ice and high water pressure means liquid water can exist at below zero degrees.

Regelation - ice meets small scale rocks, pressure increases and pmp, melts, passes around obstacle, refreezes and releases latent heat.

Question 3

Depositional landforms

Answer 3

Moraines - gives an indication into past ice extent.