Please enable JavaScript.
Coggle requires JavaScript to display documents.
Coastal Processes - Coggle Diagram
Coastal Processes
-
Types of mass movements
-
Rockfall
bits of rock fall off the cliff face, usually due to freeze-thaw weathering
-
-
-
Erosion
-
-
Abrasion
when pebbles grind along a rock platform, like sandpaper
-
-
-
Waves and wave types
Size and energy of waves depends on: the fetch (how far the wind has travelled), strength of the wind, how long the wind has been blowing for.
The water that rushes up the beach is known as the swash. The water that flows back towards the sea is known as the backwash.
Destructive waves
weak swash, strong backwash
-
-
-
-
-
Constructive waves
small waves, low wave height, long wavelength
-
strong swash, weak backwash
-
-
-
Types of weathering
-
Freeze-thaw weathering
-
- water enters cracks, 2. when temperature drops, the water freezes and expands causing the rock to widen, 3. ice melts and goes further in, 4. process repeats until the rock is fully split.
Biological weathering
- plant roots can get into small cracks in the rocks, 2. as the plants grow, the cracks become larger, 3. causes small pieces of rock to break away.
Chemical weathering
-
if a coastline is made up of rocks such as limestone or chalk, over time they can become dissolved by the acid in the water