8.7 SEA LEVEL CHANGE

Question 1

what is isostatic change?

Answer 1

-local rise of fall in land level

Question 2

what is eustatic change?

Answer 2

-sea levels either rising or falling on global scale

Question 3

sea level can change on day-to-day basis due to…

Answer 3

-high and low tides everyhour
-atmospheric air pressure, low pressure causes rise
-winds can push water towards coast

Question 4

what is eustatic fall in marine regression?

Answer 4

-during glacial periods
-ice sheets form on land in high latitudes
-water evaporated from sea is locked up on land as ice

Question 5

what is isostatic fall in marine regression?

Answer 5

-during build up of land based ice sheets
-weight causes earths crust to sag
-when ice sheets melt, the land surface slowly rebounds upwards

Question 6

what is the eustatic rise in marine transgression?

Answer 6

-end of glacial period
-melting of ice sheets return to water causing sea levels to rise
-global temp increases causing volume of ocean water to increase

Question 7

what is the isostatic rise in marine transgression?