coastal landforms (erosional) Flashcards
1
Q
headland
A
- areas of resistant/less resistant rocks - perpendicular to waves
- discordant coastline
- more resistant rock = left sticking out – headland
2
Q
bay
A
- areas of resistant/less resistant rocks - perpendicular to waves
- discordant coastline
- less resistant rock = eroded back
3
Q
cliff
A
- shaped from erosion
- waves attack base of cliff
- wave-cut notch formed
- erosion – extends notch
- cliff retreats – it falls down (not supported) – undercutting leads to instability
4
Q
wave-cut platform
A
(wide sloped surface at foot of cliff)
- when cliff collapses, material is left
- backwash: carries away eroded material = wave cut platform
5
Q
cave, arch, stack, stump
A
found on a headland due to wave action
6
Q
cave
A
- large crack opened by erosion
- cave becomes larger
7
Q
arch
A
- cave breaks through headland – erosion
- forms arch
8
Q
stack
A
- base of arch = wider/thinner (erosion + weathering)
- roof of arch collapses
- isolated column of rock
9
Q
stump
A
- stack is undercut by waves + sub-aerial weathering
- collapses (from erosion)
10
Q
cove
A
- bands of resistant/less resistant rock parallel to the waves
- concordant coastline
- hard - soft - hard - soft
- narrow entrance: hard rock erodes slowly
- soft rock erodes faster (horse shoe shape)
