Coasts geo Flashcards
Solution
Acidic properties in water dissolve minerals eg calcium carbonate in rocks such a lime stone
Abrasion
Waves fling sand and shingle against the rocks on the coast wearing the rock away
Hydronic action
The force of the wave compressed the air within air pockets of the rock on the coast pressure in the air pocket increases and the rock around it cracks explosively
Attrition
the action or process of gradually reducing the strength or effectiveness of someone or something through sustained attack or pressure.
Process of transportation
Long shore drift
Deposition
Long shore drift
The movement of pattering along the coast line in a zigzag pattern
Deposition
When waves loose there energy they deposit there load
Three factors that effect how waves are formed
Fetch
Speed of the wind
Length of time the wind blows over
Constructive waves
Help build the coast line
Destructive waves
Erode the coast line
Costal land form created by erosion
Head lands
Stumps
Waves cut platform
Head land
The coast starts of S a straight cliff over many years the coast erodes by three. Processes of erosion abrasion hydroelectric action and solution the soft rock wears away the hard rock juts out and the remaining hard rock forms a headland
Stump
The sea makes crack in the cliff the cracks get bigger and bigger to form a cave the cave get eroded all the way through until it’s an arch the arch collapses to form a stack which erodes in to a stump
Wave cut platforms
The waves carve wave cut notches in to cliff which grow until the rock above collapses this continues until slowly. The cliffs retreat leaving a wave cut platform
Costal land forms made by deposition
Bays spit and bar
Bays
Starts as a straight cliff over mating years erodes the soft rock wears awAy forming a bay
Spit
Eroded materials is picked up by waves then transported by LSD deposition begins at a bend the deposited matireals build up away from the coast the spit goes into deeper water until strong wind curves it
Bar
It is made offshore parallel to the shore and moved by strong waves( made of sand and shingle)
How can coasts be managed
Hard engineering
Soft engineering
Hard engineering
Hard engineering involves the building of entirely ARTIFICIAL structures using various materials such as rock, concrete and steel to reduce or stop the impact of coastal processes.
Soft engineering
Soft engineering – beach nourishment, dune regeneration and marsh creation.
Eg of hard engineering
Sea wall
Eg of soft engineering
Artificial sand added
Four types of erosion
Hydronic action
Solution
Abrasion
Attrition
