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Coastal Landscapes and change EQ2- Coastal Erosion and Deposition -…

- - - - 2 collaapse of wave cut notch
        
        -continued erosion of the wave cut notch causes the rock above it to become less and less stable, until it eventually collapses
        
        3 formation of new wave-cut notch
        
        -waves wash away the collapsed material and begin eroding awar at the cliff again, causing a new wave cut notch to form
        
        4 Formation of wave cut platform
        
        -over time, multiple collapsing events lead to the cliff retreating. what is left behind is called a wave cut platform
  - - - 2 abrasion
        
        -when the weaknesses in the rock widen, abrasion becomes more important
        
        3 formation of coastal landforms
        
        -over time, these erosional processes lead to the formation of coastal landforms such as caves, arches, stacks and stumps
- - - - backwash direction
        
        -gravity is the only force that acts on the backwash, so it falls back tothe sea at right angles to the coastline
        
        overall effect
        
        -because of the diffrence between the angle of the swash and the angle of the beackwash, sediment repeatedly moves in the shape of a right angled triangle
        -over time, sediment is carried along a beach
  - - - Bars
        
        -a bar is fored when a spit grows across a bay
        -lagoons aften form behind bars
  - - - transfers
        
        -they are LSD, onshore and offshore winds and tides
        
        sinks
        
        -the sinks are depositional landforms (spits, bars, beaches and sand dunes)
        
        The UK
        
        -The UK has 11 key sediment cells and seub-cells, each one with its own Shoreline managment plan (SMP)
- - - - chemical weathering
        
        -when rocks are broken down because of their chemical composition being changed
        -carbonation weathering is a type of chemical weathering that takes place when it is warm and wet:
        \carbon dioxide dissolves in rain, making it a weak carbonic acid
        the acidic rainwater dissolves types of rock tat contain calcium carbonate
  - - - Slides
        
        -when material moves down a slope in a straight line
      - Rockfalls
        
        -when material breaks apart because of erosion and weathering and then rolls down a slope
        -the fallen fragments at the base of the cliff create talus scree slopes