Coastal erosion and transportation processes

The mass of the breaking wave exerts pressure on the rock causing it to weaken. Forces as much as 30 tonnes/m2 can be exerted by high energy waves
Wave Pounding/ Quarrying (Erosion)
1 of 9
When waves armed with rock particles scour the coastline: rock rubbing against rock
Abraison/ Corrasion (Erosion)
2 of 9
A wave breaks against a cliff face, and air and water trapped in the cracks and crevasses become compressed. the average pressure exerted by the breaking atlantic waves is 11,000kg/m2
Hydraulic Action (Erosion)
3 of 9
Dissolving minerals like MgCO3 in coastal rock. The pH of sea water is usually around 7 or 8 and so is of limited significance unless the water is locally polluted and acidic.
Solution/ Corrosion (Erosion)
4 of 9
The grinding down of rock particles by friction during transportation by water or wind.
Attrition (Erosion)
5 of 9
Minerals that have been dissolved in the mass of the moving water. This type of load is invisible and the minerals will remain in solution until water is evapourated and the precipitate out of solution.
Solution (Transportation)
6 of 9
Small particles of sand, silt and clay can be carried by currents; this accounts for the brown or muddy appearence of some sea water.
Suspension (Transportation)
7 of 9
A series of irregular movements of material which is too heavy to be carried. Turbulent flow may enable sand size particules to be picked up and carried for a short distance only to drop back down.
Saltation (Transportation)
8 of 9
The largest particles in the load may be pushed along the sea floor by the force of the flow. The movement is seldom continuous. Large boulders may undertake a partial rotation before coming to rest again
Traction (Transportation)
9 of 9

Other cards in this set

Card 2

Front

When waves armed with rock particles scour the coastline: rock rubbing against rock

Back

Abraison/ Corrasion (Erosion)

Card 3

Front

A wave breaks against a cliff face, and air and water trapped in the cracks and crevasses become compressed. the average pressure exerted by the breaking atlantic waves is 11,000kg/m2

Back

Preview of the front of card 3

Card 4

Front

Dissolving minerals like MgCO3 in coastal rock. The pH of sea water is usually around 7 or 8 and so is of limited significance unless the water is locally polluted and acidic.

Back

Preview of the front of card 4

Card 5

Front

The grinding down of rock particles by friction during transportation by water or wind.

Back

Preview of the front of card 5
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