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Coastal Landforms

Define Dune. A mound or ridge of sand or other loose sediment formed by the wind. Formed by interaction with the flow of air or water.
Define Lagoon. A stretch of salt water separated from the sea by a low sandbank or coral reef.
Define Beach. A pebbly or sandy shore, esp. by the ocean between high- and low-water marks.
Define Estuary. The tidal mouth of a large river, where the tide meets the stream.
Define Cave. A large underground chamber, typically of natural origin, in a hillside or cliff.
Define Arch. A curved symmetrical structure spanning an opening and typically supporting the weight of a bridge, roof, or wall above it.
Define Stack. A stack is a geological landform consisting of a steep and often vertical column or columns of rock in the sea near a coast, isolated by erosion.
Define Stump. The sea forms a sea cave which goes into a arch then it goes into a stack and finally when the sea eroded for years a stump is formed.
Define Headland. A narrow piece of land that projects from a coastline into the sea.
Define Blowhole. Sea cave erroding by waves and it errods in the roof. Spurts out from the top.
Define Tombolo. A bar of sand or shingle joining an island to the mainland.
Define Spit. A narrow point of land projecting into the sea.
Define Wave Refraction. When a wave changes direction it is called wave refraction. This can be caused by a change in it's speed for any reason, such as coming in contact with a medium that it is unable to pass through.
Define Longshore Drift. The movement of material along a coast by waves that approach at an angle to the shore but recede directly away from it.
Define Erosion. Is a process where rocks and soil are taken away from the coastline due to the actions of wind, rain and waves. (Softer the rock; easier to errode)
What are the Coastal landforms that are created by erosion? Cliffs, Arches, Stacks, Headlands, Caves, Blowholes.
Define Deposition. Is a process where materials are added to the coastline because waves carry sand, seaweed, debris, and salt up onto the shore.
What are the coastal landforms that are caused by deposition? Spits, Beaches, Dunes, Estuaries, Lagoons.
Define debris. Scattered fragments, typically of something wrecked or destroyed
Define waves. Are an important part of both the erosion and deposition process. (link between) There are two different types of waves Constructive and Destructive waves.
Define Constructive waves. Are gentle and deposit waves, materials on the shoreline over time. Strong swash . (weak) Backswash. Builds beach.
Define Swash and Back swash. Swash: is the action of a gentle wave rising up onto the beach. ← (comes in) Backswach: is the action of a wave gently receding back into the ocean. → (goes out)
Define Destructive waves. Are strong and crash against the shoreline cutting away at it. Destroys beach.Destructive waves carry shoreline materials (like rocks, sand and vegetation) back out to sea.
Define Scouring. The action of scouring or the state of being scoured, esp. by swift-flowing water.
Define Groynes. A low wall or sturdy timber barrier built out into the sea from a beach to check erosion and drifting.
Types of Coastal management. Beach Renourishment, Groyne Field, Sea wall, Offshore Breakwater, Purchase Property,
Define Dredging. Dredging is taking sand from under water and putting it elsewhere.
Created by: MD33



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