Coasts Flashcards
Coasts and all information surrounding them
What is hydraulic action?
Waves crash against rock and compress the air in the cracks. This puts pressure on the rocks. Repeated compression widens the cracks and makes bits of the rock break off.
What is Corrasion?
Eroded particles in the water scrape and rub against the rock, removing small pieces.
What is attrition?
Eroded particles in the water smash into each other and break into smaller fragments. Their edges also get rounded off as they rub together.
What is corrosion?
Weak carbonic acid in seawater dissolves rock like chalk and limestone.
How many groynes were built at mappleton in 1991 and how much did they cost?
2; they cost 2 million,
What is traction?
Large particles like boulders are pushed along the seabed by the force of the water.
What is suspension?
Small particles like silt and clay are carried along in the water.
What is saltation?
Pebble-sized particles are bounced along the sea bed by the force of the water.
What is solution?
Soluble materials dissolve in the water and are carried along.
