Costal Processes Flashcards
(29 cards)
Swash is….
The process of the wave coming in
Backwash is….
The process of the wave going out
Constructive wave have….
A strong swash and a weak backwash. They break about 6-9 times a Minuit and are long in relation to their height
Destructive waves have…
A weak swash and a strong backwash. This erodes pebbles and shingle. High in proportion to their length
Fetch…
The distance a wave has travelled
The things that affect the size of a wave are…
- length of time he wind is or has been blowing
- strength of the wind
- fetch
- other waves
Destructive waves happen in…..
Autumn or winter
Hydraulic Action..
Water continually hits the rocks and compresses air into cracks, the wave goes out and the air rushes out and the rocks break away.
Abrasion ( or corrasion) is…
Waves break and hurl rocks and debris at the rocks to erode
Corrosion/ solution is…
Chemicals within the water wear away rock. Sea water and weak acids dissolve the rock minerals
Attrition is…
When the rocks hit one another and get smaller and break up.
Wave cut platforms are…
Fairly flat, rocky areas at the bottom of cliffs. Waves Erode the coastline causing undercutting at the base of the slope.
Headlands and bays are…
Always found together, a headland separated bays along a coastline. The areas of weak less resistant rock erodes quicker to become bays, resistant rocks become headlands
A stack is a…
Isolated column of rock standing off the coast, once attached to land
A stump is…
A collapsed stack
Erosion is…
The wearing away if land or soil by action of wind, water or ice. The more erosion the quicker the recession
Transportation is…
The eroded material that is transported by waves, currents, tides and long shore drift.
Deposition is…
The material e.g. Mid, sand, shingle and pebble is dumped or deposited to form a beach
Long shore drift is..
Material movement along a coastline
Groynes…
Cause less material to be transported further along the coast
Transportation…
The movement of material by rivers, glaciers, waves and the wind.
Deposition…
The laying down or depositing of material previously transported by rivers l, glaciers, waves and wind.
Solution is…
Chemicals break down rock and tiny particles go into the sea. Chemical breakdown of Carboniferous rock
Saltation is…
Rock is rolled or hopped along the sea bed, these are normally smaller particles.
