Geography - AQA - GCSE - Physical - Coasts

Josh Anderson
Mind Map by Josh Anderson, updated more than 1 year ago
Josh Anderson
Created by Josh Anderson over 5 years ago


GCSE Geography Mind Map on Geography - AQA - GCSE - Physical - Coasts, created by Josh Anderson on 12/31/2014.

Resource summary

Geography - AQA - GCSE - Physical - Coasts
1 Processes
1.1 Erosion
1.1.1 Corrosion Dissolving because of acidity in water
1.1.2 Corrasion/Abrasion Rock rubbing against other rocks
1.1.3 Attrition Rock hitting other rocks
1.1.4 Hydraulic action Sheer force of water against rocks
1.2 Mass Movement
1.2.1 Rotational slumping Large areas of land falling very quickly Material shifts with a rotation
1.2.2 Mudflow Saturated soil falling slowly Material shifts in a straight line
1.2.3 Rockfall Rocks falling usually due to freeze thaw weathering Material shifts vertically
1.2.4 Landslide Rocks rolling downhill Material shifts in a straight line
1.3 Weathering
1.3.1 Chemical Acidic rain corroding
1.3.2 Biological Animals burrowing into cliffs Roots of plants in cliffs
1.3.3 Physical Freeze thaw Water in cracks freeze and expand, splitting rocks and cliffs Exfoliation During the day, heats up and at night, cools down, expanding and contracting and then cracking
2 Landforms
2.1 Wave-cut Platform
2.1.1 Wave-Cut Notch Example Caused by high and low tide
2.1.2 Example Wave-cut notch leaves cliff undercut Cliff collapses leaving area of land where cliff once was Repeats and leave platform
2.2 Headland
2.2.1 Cave Arch Stack Stump Example Stack is eroded down to make stump Example The top of the arch collapses, leaving stacks Example A cave is eroded all the way through Example Where a fault in a cliff is eroded
2.2.2 Example Harder rock that doesn't erode as easily
2.3 Bay
2.3.1 Beach Example Less wave energy in bays because of wave refraction so deposition occurs
2.3.2 Example Softer rock that erodes easier than the harder rock
2.4 Spit
2.4.1 Example Prevailing wind means longshore drift occurs, taking sediment away from the coast. Occasionally, a secondary wind kicks in and curls the end of the spit around. The process repeats. If there is an estuary, the spit stops
2.5 Bar
2.5.1 Tombolo Example A bar that connects the mainland to an island
2.5.2 Example A spit that has grown across a bay, undisturbed, joining the two headlands. There is a lagoon on one side
2.6 Cove
2.6.1 Example Fault in hard rock is eroded, with soft rock behind the hard rock Soft rock is further eroded to form a cove
3 Case studies
4 Waves
4.1 Constructive
4.1.1 Weak backwash Strong swash Short waves Long length waves Deposition occurs Low frequency
4.2 Destructive
4.2.1 Strong backwash Weak swash High waves Small length waves Erosion occurs High frequency
4.3 Terms
4.3.1 Fetch - Distance of water over which the wind has blown to produce a wave.
5 Longshore drift
5.1 The prevailing wind carries sediment along the beach
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