Coasts- Marine Processes Flashcards

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1
Q

Deposition along high energy coastlines

A
  • small particles (clay/sand) easily transported

- large heavier material is deposited, forming single beaches

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2
Q

Deposition along low energy coastlines

A

Even the smallest matter is deposited firming mudflats and salt marshes

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3
Q

Hydraulic action

A
  • the impact on ricks from the sheer force of water

- can exert enormous pressure on a rock surface, weakening it

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4
Q

Wave quarrying

A
  • a breaking wave traps air as it hits a cliff face
  • the air is compressed into any gaps- causes huge pressure
  • as water retreats there is an explosive effect of air pressure being released
  • cliff face weakened allowing storms to remove large chunks (cavitation)
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5
Q

Abrasion/corrosion

A
  • eroded material being thrown against the rock by the waves
  • also conducts erosion of wave cut platforms due to movement of material back and forth
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6
Q

Attrition

A

-rocks which are carrying out abrasion are worn down into smaller rounder particles

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7
Q

Solution (corrosion)

A
  • not common as sea water is usually alkaline not acidic

- but wheee sea water interacts with freshwater supplies, carbon based rocks (eg. limestone) may be dissolved

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8
Q

Traction

A

The rolling of coarse sediment along the sea bed that is too heavy to be picked up and carried by the sea

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9
Q

Saltation

A

Sediment ‘bounced’ along the seabed, light enough to be picked up or dislodged but too heavy to remain with the flow of water

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10
Q

Suspension

A

Smaller (lighter) sediment picked up and carried within the flow of the water

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11
Q

Suspension

A

Chemicals dissolved in the water, transported and precipitated elsewhere. This plays an important role in the carbon cycle, transferring and redepositing carbon in the oceans

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