Why Are Some Beaches Sandy?
17 July 2018, 15:41 | Updated: 17 July 2018, 16:11
Mystery Hour Question
Question: Why are some beaches sandy and some stony? Johnny from Richmond.
Name: Ed, Plymouth.
Qualification: Studying civil and coastal engineering.
Answer: The composition of the beach is dependent on strength or power of waves and profile of beach.
The high energy waves caused by a large depth of water and a steep profile beach are more likely to produce pebble beaches because less force spread over the beach.
A flat profile beach with high energy waves means that the energy is spread across the beach and thus creates sand.