Erosional landforms

Question 1

bedding plane

Answer 1

a line of natural weakness in a rock

Question 2

what are the different types of erosional landforms?

Answer 2

-concordant coastline
-discordant coastline
-erosion of a headland
-wave cut platforms

Question 3

how does a concordant coastline form?

Answer 3

-parallel rock forms to coastline
-there’s a weakness in the outer layer of hard rock
-waves break through crack in hard rock
-waves erode soft rock very fats
-cove forms

Question 4

how does a discordant coastline form?

Answer 4

-rock types are perpendicular to the coastline
-soft rock erodes faster than hard rock
-bays form in soft rock making the hard rock headlands

Question 5

how des a headland become eroded?

Answer 5

1. the sea attacks a weakness in the rock, eroding it to form cave
2. the erosion continues until it has eroded through the headland, forming an arch
3. the arch is enlarged due to the action of waves, wind and rain
4. the roof of the arch collapses due to gravity and continuous erosion from the sea, the fallen material is quickly removed by the sea and a stack remains
5. the stack is eroded down to a stump, often only visible at low tide
6. the process may start again

Question 6

how is a wave cut platform formed?

Answer 6

1.waves hit land, they move in a circular rotation
2. waves erode the land through hydraulic action, creating an overhang and a wave cut notch
3. overhang falls, just a wave cut notch is left
4. the waves erode the land again through hydraulic action, creating another overhang and a new wave cut notch
5. overhang falls, creating a wave cut platform, reduced depth of sea means less weight of water hitting base of cliff, therefore slows down erosion, wave cut platform starts to protect the cliff behind