flambourough head changes over time Flashcards
what occurs over seconds
Mass movement
example of a mass movement event
rotational slumping which happened in Scarborough 1993 - which lead to the collapse of holdback house - due to the ground below collapsing
how was the event sped up
it was sped up due to high amounts of rainfall - weakened the ground beneath it - may of been days or hours
how does it differ depending on seasons
during winter waves have more energy - therefore more of an effect on the coastline
therefore destructive waves cause more erosion in winter - remove sediment from on shore locations to offshore causing beach gradient to reduce
example of seasonal change
Filey bay was formed during high energy destructive waves - especially sped up during winter 2010-2011
what else can speed up changes
sub aerial processes and weather can be enhanced in different seasons - speeding up changes
why is it a negative feedback loop
as the changes from winter cancelled out in summer as beaches form due to more constructive waves
how do changes over millennia occur
usually come from large changes in sea level rise from interglacial and glacial periods
example of millennial change at high energy
the till on top of flmaboruough head was left behind from the last (devensian) glacial period
another example
shore platform present at robin hoods bay could have been formed over past 6000 years due to similar sea levels - however evidence shows it may have just been formed in previous interglacial
