1.7 - Long Term SL Changes

Question 1

Eustatic fall?

Answer 1

During glacial periods, ice sheets form and evaporated water gets locked

Question 2

Eustatic rise?

Answer 2

Ice sheets melt into the ocean

Thermal expansion occurs due to higher global temperature

Question 3

Isostatic fall?

Answer 3

Ice sheets melt and land rebounds up causing emergent coastline

Question 4

Isostatic rise?

Answer 4

Land sinks

Sediment deposited in large river deltas meaning more weight and delta subsidence

Question 5

SL fall causes

Answer 5

Raised beaches
Fossil cliffs
Offshore bars

Question 6

Other factors that change morphology are

Answer 6

Wave type
Geology
Topography

Question 7

New Orleans

Answer 7

Subsidence as a city is on a coastline
Glaciers in N America melting sinks it even more when New Orleans already far below - post-glacial readjustment
Prone to hurricanes
Over rely on levees