Coastal Zone: Landforms Caused By Depositon Flashcards
0
Q
Where are beaches found on coasts?
A
Between the high water mark and the low water mark.
1
Q
What is formed by deposition?
A
Beaches.
2
Q
By what type of wave are beaches formed?
A
Constructive wave.
3
Q
Give the two different variation of beaches.
A
- Sand
- Shingle
4
Q
Characteristics of a sand beach…
A
- Flat
- Wide
- Sand particles are small
- Weak backwash makes a long gentle slope
5
Q
Characteristics of a shingle beach…
A
- Steep and Narrow
- Shingle particles and large- Weak backwash can’t move material up and down
- Shingle builds up and creates a steep slope
6
Q
What is a spit?
A
A spit is a beach that sticks out to the sea
7
Q
What is a bar?
A
A bar is a spit that connects with another bit of land
8
Q
What process usually forms spits and bars?
A
Longshore drift
9
Q
4 steps to form a spit?
A
- Longshore drift transports sand and shingle past the bend and deposits it in the sea
- Strong winds and waves can curve the end of the spit (recurved end)
- The sheltered area bending the spit is protected from the waves and lots of material is built up here which means plants can grow here
- Overtime this area can become a salt marsh or mud flat
10
Q
How is a bar formed?
A
- A bar is formed when a spit joins two headlands together (Slapton in Devon)
- The bar cuted of the bay from the sea
- The bay becomes a lagoon
