coastal key idea 1a.

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12 Terms

1

marine inputs

  • waves

  • tides

  • currents

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2

terrestrial inputs

  • river sediment

  • weathering

  • biological contributions (material from coastal vegetation)

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3

atmospheric inputs

  • wind

  • precipitation (affects river discharge + sediment delivery)

  • temperature

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4

human inputs

  • coastal engineering (groynes, seawalls, etc)

  • land use change (e.g urbanisation)

  • pollution

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5

erosional processes

  • hydraulic action

  • abrasion

  • attrition

  • solution

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6

depositional processes

  • sediment transport

  • longshore drift (transport of sediment along the coast by wave action)

  • deposition

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7

weathering processes

  • mechanical (physical breakdown of rocks)

  • chemical (breakdown via chemical reactions)

  • biological (breakdown via biological activity e.g. plant roots)

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8

mass movement processes

  • slumping (downward movement of saturated soils/sediment)

  • landslides

  • creep (slow downhill movement of soil)

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9

output: sediment deposition

  • beaches

  • spits and bars

  • dunes

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10

output: erosional landforms

  • cliffs and wave-cut platforms

  • caves, arches, stacks and stumps

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11

outputs: transported sediments

  • offshore bars

  • deltas

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12

outputs: loss of land

  • coastal retreat (inland movement of coastline due to erosion + sea level rise)

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