coastal landforms Flashcards
bay
A low-lying inlet of land on the coast.
headland
A high area of land that extends out into the sea.
longshore drift
The movement of material along a coastline due to the angled approach of waves.
mass movement
A large-scale downward movement of rocks and material.
Able to withstand change, eg resistant rocks are hard and are not easily eroded.
resistant
sheltered bay
A coastal area that is protected from strong winds and large waves.
Processes located at the Earth’s surface.
sub aerial process
An area of erosion at the base of a cliff formed by the waves.
wave-cut notch
A flat area in front of a cliff, just below the low tide mark. These were formed when the waves eroded the cliff, but left a flat platform behind.
wave-cut platform
The coastline is constantly eroding. There are four key types of erosion
Abrasion - waves transport material which hit the cliff and gradually wear it away.
Hydraulic action - as waves approach the coast they trap air and force it into gaps in the cliff. Eventually this weakens the rock.
Attrition - waves cause the rocks to crash against each other, breaking them down into smaller and rounder pieces.
Corrosion (also known as solution) - salts and acids in seawater dissolve the rock gradually over thousands of years.
In addition, changes in landforms can be a result of wind erosion, weathering and sub-aerial processes such as mass movement.