Tides Flashcards
tides are caused by
The gravitational pull of the sun or moon causes tides
The difference between high and low tide is known as the
tidal range
Larger tidal ranges produce
stronger tidal currents and this can transport more sediment, particularly in the areas around estuaries
Deposition occurs when waves lose energy
Waves lose energy when:
wind slows or changes direction
The wave experiences friction, usually with the sea floor as the depth decreases
When the coastline changes direction such as at an estuary or headland
It is a gradual rather than immediate process
High energy coastlines deposit
and high energy coastline example
deposit large rocks and shingle but generally maintain enough energy to carry smaller sediment particles
This is why these types of coastlines tend to have rocky beaches, such as Brighton on the south coast of England
Low energy coastlines deposit
smaller sediment due to low wave velocity, creating sandy beaches