Eustatic and Isostatic Flashcards
1
Q
What caused sea level changes over the last 100,000 yrs?
A
Increase in temperature
2
Q
what is eustatic change?
A
Sea levels changing
3
Q
what is Isostatic change?
A
Land level changing
4
Q
What causes eustatic change?
A
- climate changing
- tectonic movements
5
Q
What causes isostatic change?
A
- uplif or depression of the earth’s crust
- tectonic plates
- land rebounding
- shrinkage of groundwater
6
Q
Name all the emergence landforms.
A
- raised beach
- marine platform
- relic cliff
7
Q
Name all the submergence landforms.
A
- RIA
- Fjord
- Dalmatian coast
8
Q
What change causes emergence landforms?
A
Isostatic
9
Q
What change causes submergence landforms?
A
Eustatic
10
Q
How is a raised beach formed?
A
- land rebounding upwards as ice melts
- sea levels going down left deposition
11
Q
Give an examples of a raised beach
A
East Prawle, South Devon
12
Q
How is a RIA formed?
A
- sea levels rise from melting ice
- flooded river valley
13
Q
Give an Example of a RIA
A
Salcombe, Devon
14
Q
How is a fjord formed?
A
- Ice melts and floods valley
15
Q
Give an example of a fjord
A
Harddanger Norway
