1.7 - Relatively Sinking (Louisiana) Flashcards
1
Q
What is eustatic fall?
A
- glacial periods
- ice sheets ar formed on high latitude land
- evaporated water is locked up as ice
2
Q
What is eustatic rise?
A
- interglacial periods
- ice sheets melt, return water to the seas
- global temperature = increase volume of water in ocean(thermal expansion)
3
Q
What is isostatic fall?
A
Ice sheets melt and land surface slowly rebounds
Lifts land surface out of the sea
4
Q
What is isostatic rise?
A
Land sinks at coast -> sediment deposited in large river delta means that thee is an increase in weight = crustal sag and delta subsidence
5
Q
What is Louisiana susceptible to?
A
Storm surges
Global sea rise
Isostatic tectonic uplift
6
Q
What are the two factors which can affect sea level change?
A
Eustatic change
Isostatic change
