JC Geog Coastal Flashcards

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Flashcards of key terms
Steven Morgan
Flashcards by Steven Morgan, updated more than 1 year ago More Less
John Ditchburn
Created by John Ditchburn about 10 years ago
Steven Morgan
Copied by Steven Morgan over 7 years ago
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Resource summary

Question Answer
Attrition When rocks hit and bounce off each other. Process of erosion.
Swash the forward movement of a wave up a beach.
Fetch the distance of open water which a wave travels.
Backwash the backward movement of water down a beach.
Constructive wave a powerful wave with a strong swash & weak backwash. Deposits material.
Destructive wave a strong wave that erodes the coastline.
Cliff a steep or vertical face of rock often found at the coast.
Retreat the collapse of a cliff face as it moves in land.
Hydraulic Action Force of moving water
Abrasion the effect of rocks being flung at the cliff by powerful waves.
Wave-cut platform a wide, gently sloping rocky surface at the foot of a cliff. Marks the base of the old cliff before it retreated inland.
Wave-cut notch a small indentation (or notch) cut into a cliff by coastal erosion roughly at the level of high tide.
Overhang Refers to the heavy piece of rock left hanging when a notch is created in a cliff face.
Compressed air Process of erosion. Air is forced into tiny cracks. The air expands and causes tiny explosions.
Sea Cliff Erosion Hydraulic action Compressed air Abrasion Wave cut platform Notch Overhang & retreat
Longshore drift Process of transport Zig/zag pattern In at acute angle Washes straight back out Dictated by wind strength & direction
Sea arch After sea cave before sea stump Erosion Hydraulic action Abrasion Cave erodes all the way through a headland.
Sea cave Erosion Hydraulic action Compressed air Abrasion Before sea arch Hole in a headland Blowhole can form on cave roof.
Blowhole Erosion Compressed air Roof of cave to surface Spray McSweeney's Gun Donegal
Storm beach
Tombolo Deposition Long shore drift Joins mainland to island Visible at low tide not high
Sand Bar & Lagoon Deposition Long shore drift Sand spit grows to make bar Bar cuts off bay Bay becomes lagoon May drie out over time
Sand spit Deposition Long shore drift When coastline changes shape May create a bar Will arch due to waves direction
Groyne Coastal defense Stop Long shore drift Right angles to beach Wood Traps sediment
Blowhole Channel connecting roof of a cave to the surface.
Sea cave A narrow opening in to a headland
Sea arch When a sea cave is eroded all the way through a headland
Sea stack/stump When the roof of an arch collapses leaving a stack in the water. When it is eroded over time its is called a sea stump.
Fore-shore Part of beach closest the water. Smallest material found here.
Back shore Part of beach farthest away from the water.
Storm beach Where the biggest & heaviest stones are deposited during a storm.
Beach A collection of sand, shingle and stones. Usually found in a sheltered bay.
Long shore drift Process of marine transportation.
Bay Area of soft rock eroded into the coastline.
Headland Area of hard rock that is slow to be broken down. It sticks out into the ocean.
Coastal Management How humans manage coastal processes like erosion & long shore drift.
Groyne Wall built at right angles to coastline to stop LDS.
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