weathering Flashcards
(3 cards)
1
Q
freeze thaw weathering is
A
water enters cracks, freezes and expands, causes pressure on rock, if repeated rock will weaken and shatter, deposited as scree
2
Q
salt crystallisation is
A
water enters pores slightly saline, evaporation causes salt crystals, if large they create stress, rock disintegrates
3
Q
carbonation
A
carbon dioxide dissolves into water, forms weak acid, limestone is vulnerable due to calcium, forms clints and gykes
