Geosphere- Terrestrial Sphere

Question 1

How many phases are there in WM Davis’ “cycle of erosion”

Answer 1

3- young, mature and old

Over time landscapes become more eroded and relief drops considerably

Question 2

Base level is equivalent to

Answer 2

Sea level

Question 3

What is peneplanation

Answer 3

The decline in surface elevation , gradient and relief over time as landscape erodes

Question 4

Modifications to Davies’ model, name 3 main ones

Answer 4

Renewed uplift
Climate change
Geology

Question 5

What is orogenic uplift

Answer 5

Uplift by horizontal compression and folding of the earths crust

Question 6

What is epeirogenic uplift

Answer 6

Uplift by vertical elevation of large blocks of earths crust. Can have slow uplift over long periods of time

Question 7

Denudation is another word for

Answer 7

Erosion/ weathering and transport

Question 8

What is exhumation

Answer 8

The removal of young deposits to reveal the underlying structure of older rocks

Question 9

How long is the Bengal fan

Answer 9

3000km

Question 10

Name 3 controls (things that impact) on denudation rates and explain each briefly

Answer 10

Basin relief (steeper=more erosion) 
Climate and vegetation (no rain means less erosion) 
River incision rate (more mountainous=more erosion) 
Sea level (sets base level, eustatic controls, thermal expansion)