1.7 - Long Term SL Changes Flashcards
Eustatic fall?
During glacial periods, ice sheets form and evaporated water gets locked
Eustatic rise?
Ice sheets melt into the ocean
Thermal expansion occurs due to higher global temperature
Isostatic fall?
Ice sheets melt and land rebounds up causing emergent coastline
Isostatic rise?
Land sinks
Sediment deposited in large river deltas meaning more weight and delta subsidence
SL fall causes
Raised beaches
Fossil cliffs
Offshore bars
Other factors that change morphology are
Wave type
Geology
Topography
New Orleans
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