coastal landforms (depositional)

Question 1

beach

Answer 1

• form in sheltered areas
  e.g. bay
• deposition – constructive wave movement – when swash is stronger
• usually occurs in summer months
• sand can be blown on shore and create sand dunes

Question 2

spit

Answer 2

an extended stretch of sand or shingle that extends out to sea from the shore
- when there is change in coastline or mouth of river
- may have hooked end depends on opposing wind and currents

Question 3

spit formation

Answer 3

1. sediment transported by longshore drift
2. where coastline changes direction – deposition of sediment
3. spit slowly builds up to sea level and extends in length
4. change in wind – hooked end
5. area behind becomes sheltered
6. deposited to form salt marsg

Question 4

bar

Answer 4

when a spit grows across a bay and joins two headlands
- bar of sand formed

Question 5

lagoon

Answer 5

small body of water cut off from beach
- formed behind bar or tombolo
- not last forever – fill w sediment

Question 6

tombolo

Answer 6

formed when spit joins mainland to island
e.g. chersil beach in dorset joined to isle of portland