sea level change formations and maldives Flashcards
isostaic change
local change in land level relative to the sea
eustatic change
sea level change on a global scale
resons for sea level change
thermal expansion
icemelt
isostatic rebound
what physical things change sea level
3things
volcanic winters =less expansion
orogenic = underwater mountain building increases sea level
eperrogenic = sea floor spreading widens oceans causing decrease in sea level
example of ria
kingsbridge devon
example of dalmation coast
croatia
example of a fjord
east fjords iceland
example of raised beaches
ISLE OF AARAN SCOTLAND
ria formation
rivers cut downward into valley to lower base level
increased sea level drowns lower part of the river to create branched inlets that decrease in size and depth further inland
dalmation coast formation
formed when mountain ridge that runs parrallel to to coast is submerged
ridges stick out to look like islands
fjord formations
glaciers erode land to below sea level - u shaped valleys
rise is sea levels floods valleys
long deep narrow inlets, steep sides and hanging valleys
raised beaches formation
areas of former wave cut platform raised to above sea level due to isostatic rebound
impacts of sea level change 3 things
costs millions for coastal protection
rapid erosion of coastline
increase frequency of storm surges and tropical storms
avaergae height above sea level maldives
1.5 meters
what has coral reef erosion caused
less fish breeding
