Evaluate the view that rates of coastal recession are largely controlled by geological factors20 paragraph 1 Flashcards
What is coastal recession?
The net loss or displacement of land, or the long-term removal of sediment and rocks along the coastline due to the action of waves, currents, tides, wind-driven water, or other impacts of storms
Where is an example of limited and slow costal recession due to rock type?
Kettlness, N. Yorkshire
where a headland made from erosive resistant rock forms the end of a bay, removing wave energy going into the bay
Where is an example of extensive and fast coastal recession due to rock type?
Holderness coastline looses 7-10cm per year due to being mad of low erosive resistant boulder clay and chalk.
Rock Type and Lithology
Advantages for idea Hard Rock
Coasts made of hard rock (e.g., granite, basalt) erode much more slowly due to their resistance to physical and chemical weathering.
Rock Type and Lithology
Advantages for idea soft Rock
Coasts made of soft rock (e.g., clay, sandstone) erode quickly due to their susceptibility to weathering and wave action
Bedding Planes and Joints
advantage of Bedding Planes and Joints s
The presence of joints, faults, and bedding planes in rocks can make them more susceptible to erosion
Disadvantages
This factor can vary significantly even within small geographic areas, making it hard to generalize.
Human activities such as coastal defenses can significantly alter natural erosion rates regardless of rock type.