12 terms

Coasts - Key Words

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Terms in this set (...)

Chemical Weathering
Where chemicals in the sea/rain water alter the structure of the rock
Fetch
The distance the wind blows over the surface of the water
Mass movement
The downhill movement of weathered material under the force of gravity. The speed can vary considerably
Waves
Ripples in the sea caused by the transfer of energy from the wind blowing over the surface of the sea
Biological weathering
Where living things, like burrowing animals or roots of plants weaken the structure of the rock
Constructive waves
The swash is stronger than the backwash and deposition is the dominant process
Destructive waves
The backwash is stronger than the swash and erosion is the dominant process
Soil creep
A slow form of downhill soil movement. Gravity pulls water and the soil downhill which creates a rippled effect
Slumping
A large area of land moving down a slope. usually when soil has become saturated and rotation occurs along a failure plane
Mechanical (physical) weathering
Where a physical breakdown of rocks occurs in situ due to the process of freeze thaw
Rock falls
When fragments of rock are weathered or eroded and fall from the cliff as whole parts
Weathering
Breakdown of rock by weakening rock structure through chemical, biological or mechanical (physical) weathering