Dorset weathering #3 Flashcards
1
Q
where and why does frost shattering occur?
A
chalk at Lulworth Cove as it is very porous
2
Q
what is salt crystallisation?
A
Salt crystals form in small pores generate stress because they are disjoining forces between salt and mineral crystals in pore walls.
3
Q
what does expansion and contraction cause?
A
creates cracks which encourages further erosion
4
Q
what types of rock does solution affect most and where?
A
chalk and limestone (Lulworth cove)
5
Q
how does biological weathering occur and what type of rock is vulnerable?
A
Plant roots penetrate through earth’s surface into rock wedging rock apart and animals burrowing through rocks. Affects porous rocks like chalk.
