EQ3 Flashcards
What is Isostatic change?
Isostatic sea level changes are local changes in the sea level
Why are Isostatic changes caused?
Isostatic changes are caused by vertical movements of land
What causes movement of land?
Compression/Decompression of land (Glaciers)
What is Eustatic change?
Eustatic sea level change is global changes in the sea level
What are the causes of Eustatic sea level change?
Changes in the volume of the water (Climate Change)
What are Emergent coastlines?
An emergent coastlines is a strecth along the coast that has been exposed by a fall in sea levels
What are Submergent coastlines?
A submergent coastline is a stretch along the coast that has been inundated by a rise in sea levels
Examples of Emergent landforms
Raised Beach
Fossil Cliff
Barrier Island
Examples of Submergent landforms
Ria
Fjord
Dalmation
What is coastal recession?
Coastal recession is the loss of land along the coastline due to erosion
Coastal Recession Case Study
The Holderness Coastline
Why are erosion rates so high along the Holderness Coastline?
- Cliffs are made up of boulder clay (weak rock)
- Wave energy breaks the boulder clay
- Small beaches offer little protection
Which processes of weathering affect Holderness?
- Freeze thaw
- Alternate wetting
Why are some coastal communities vulnerable to rising sea levels?
- Rock type
- Population density
- Wealth of a community
- Severe weather
Local factors that can increase flood risk
- Height
- Vegetation removal
- Subsidence
