Landform Development - Isotasy Flashcards
What is Exogenic
agents that provide energy for processes occurring at or near the earth’s surface. (Extrusive)
What is Endogenic
formed or occurring internally (Intrusive)
What is Isostasy
The rise and fall of the earths crust in relation to sea level
What does it mean to ‘’ Take weight off the block’’
Removing weight on mts through weathering and erosion
What effect does ‘’ Taking weight off a block have on the earths surface
The continental crust rises and sea levels fall
What is the geological name of ‘’ Taking weight off the block ‘’
Isostatic rise or rebound
What does it mean to ‘’ Add weight on the block’’
Weathered and eroded rock deposited in seas, fold mts or heavy ice add weight
What effect does ‘’ Add weight on the block’’ have on the earths surface
Continental crust sinks and sea levels rise
What is the geological name of ‘’ Add weight on the block ‘’
Isostatic fall or readjustment
What 2 impacts can Isostatic rebound have on rivers
River rejuvenates or river captures
What is River rejuvenation
The way rivers react when the crust rises, tricking the river into thinking its in the young stage creating younger features
What features does River rejuvenation cause (4)
Knickpoints, Entrenched meanders, Ingrown Meanders, Paired Terraces
What do Knickpoints mark
The point where the river used to flow into the sea
What shape do Ingrown Meanders have
Asymmetrical
What do Ingrown Meanders create
River slopes and beaches
