Coastal Zones

Mind Map by sophie.oke1810, updated more than 1 year ago
Created by sophie.oke1810 over 5 years ago


Mass movement Weathering Waves Erosion

Resource summary

Coastal Zones
    1. Mechanical
      1. breakdown of rock without changing its chemical composition - freeze thaw weathering
        1. 1. temperature alternates above and below 0'C
          1. 2. Water gets into cracks
            1. 3. When water freezes it expands, puts pressure on the rock
              1. 4. When water thaws it contracts, releasing pressure
                1. 5. This process repeats and widens the crack causes rock to break up
              2. Chemical
                1. break down of rock by changing chemical composition - carbonation weathering (warm and wet conditions)
                  1. 1. Rainwater has carbon dioxide dissolved in it- makes it weak carbonic acid
                    1. 2. Carbonic acid reacts with rock that contain calcium carbonate so rocks dissolve by rainwater (limestone)
                2. MASS MOVEMENT
                  1. shifting of rocks and loose material down a slope.
                    1. causes coasts to retreat rapidly
                      1. more likely to happen when material is full of water
                      2. 2 types
                        1. material shifts in a straight line
                          1. material shifts with a rotation
                        2. PROCESS OF EROSION
                          1. Hydraulic Action - waves crash against rock, compress air in crack. Pressure on rocks- process repeats widens the crack, rocks fall off
                            1. Abrasion - eroded particles in water scrape and rub against rock, removing small pieces
                              1. Attrition - particles smash into eachother and break into smaller fragments - edges round off
                                1. Solution - particles dissolve in water
                                2. WAVES
                                  1. Constructive
                                    1. carry and deposit material
                                      1. low and long
                                        1. swash is more powerful than the backwash
                                          1. material is deposited instead of taken away
                                      2. Destructive
                                        1. carry out erosional process
                                          1. high and steep
                                            1. backwash is more powerful than the swash
                                              1. material removed from beach
                                        Show full summary Hide full summary


                                        Geography Coastal Zones Flashcards
                                        Zakiya Tabassum
                                        Geography Quiz
                                        Using GoConqr to study geography
                                        Sarah Egan
                                        All the Countries of the World and their Capital Cities
                                        River Processes and Landforms
                                        The Rock Cycle
                                        GCSE Geography - Causes of Climate Change
                                        Beth Coiley
                                        Tectonic Hazards flashcards
                                        Globalisation Case Studies