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GEO1213: Our Changing Planet > Geosphere- Terrestrial Sphere > Flashcards

Flashcards in Geosphere- Terrestrial Sphere Deck (10)
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1
Q

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

A

3- young, mature and old

Over time landscapes become more eroded and relief drops considerably

2
Q

Base level is equivalent to

A

Sea level

3
Q

What is peneplanation

A

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

4
Q

Modifications to Davies’ model, name 3 main ones

A

Renewed uplift
Climate change
Geology

5
Q

What is orogenic uplift

A

Uplift by horizontal compression and folding of the earths crust

6
Q

What is epeirogenic uplift

A

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

7
Q

Denudation is another word for

A

Erosion/ weathering and transport

8
Q

What is exhumation

A

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

9
Q

How long is the Bengal fan

A

3000km

10
Q

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

A
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)