Coastal Processes

Question 1

Sub aerial

Answer 1

Refers to processes that take place at the base of the atmosphere. All rocks are subjected to these weathering processes once they are exposed at the earth’s surface

Question 2

Mass movement

Answer 2

This involves the movement of material downhill under the force of gravity.
The rocks along the coastline would have been subject to weathering and erosion

Question 3

Slides/slumps

Answer 3

Slides are saturated weathering material moving down a slope under the influence of gravity.
Slumps involve a whole segment of the cliff moving downslope along a saturated shear plane

Question 4

Slides and slumps location

Answer 4

They usually occur when the bottom of a cliff is eroded by waves. The slope becomes steeper and the cliff can slide downwards in a rotational manner

Question 5

Rock fall

Answer 5

Rock falls occur when fragments of rock weathered from a cliff face fall under the gravity and collect at the base

Question 6

Mudflows

Answer 6

Occur after periods of heavy rainfall when loose surface material becomes saturated and the extra weight causes the material to become unstable and move downhill in an almost fluid state

Question 7

Soil creep

Answer 7

The slowest of downhill movements, occurring on very gentle and well-vegetated slopes. Moves by less than 1cm per year

Question 8

Solifluction

Answer 8

Slow downhill flow of soil in artic regions. Results from the complete water logging of sediment

Question 9

Weathering

Answer 9

The breakdown of rocks in situ- where they lie and are exposed