Processes Of Coastal Erosions Flashcards
What are the 5 processes of coastal erosions?
Hydraulic action
Abrasion
Compression
Solution
Attrition
What is hydraulic action?
The physical force of the waves breaks material off the coastline. During a storm, waves are stronger and their ability to erode increases.
What is abrasion?
Loose material (rocks and sand) is thrown against the coastline by waves. This action breaks more material off the coastline.
What is compression?
When waves crash against against a cliff, air gets trapped in the cracks and joints on a cliff face and becomes compressed. When the waves retreat, the pressure suddenly released. This process of compression and release happens repeatedly until the rock eventually shatters.
What is compression also known as?
Compressed air
What is solution?
Some rocks, such as limestone and chalk, are dissolved by water.
What is attrition?
The stones that are carried in the water are constantly hitting against each other. Over time, they become worn down, smooth and rounded. This can eventually lead to the formation of sand.
