Coastal Landscapes Flashcards
(63 cards)
What is the definition of a coast?
The meeting point between the land and sea.
What are the two main categories of coastal processes?
- Marine processes (Offshore)
- Terrestrial processes (Onshore)
Name the five processes that coastal processes are divided into.
- Wave action
- Erosion
- Transportation
- Weathering
- Mass movement
How do softer rocks like sands and clays affect coastal landscapes?
They are easily eroded by destructive waves to form low, flat landscapes such as bays and beaches.
What type of coastline is characterized by the same rock type running parallel to the sea?
Concordant coastlines.
What features are formed by discordant coastlines?
Headlands and bays.
What type of rock typically forms high and steep cliffs?
Hard rock.
What are the four types of erosion caused by destructive waves?
- Hydraulic Action
- Attrition
- Corrosion
- Abrasion
What is the effect of attrition on rocks during coastal erosion?
It smooths and rounds rocks as they collide and travel along the coast.
What defines a headland?
- Cliffs along its sides
- Projects out to sea
- Usually longer than it is wide
- Composed of resistant rock
What is a wave-cut platform?
A wide gently sloped surface found at the foot of a cliff.
How do caves, arches, and stacks form?
Through wave action and sub-aerial weathering affecting a headland.
What is wave refraction?
The change in wave angle as waves approach the shore, concentrating erosive action on headlands.
What happens to an arch over time due to erosion?
The roof of the arch collapses, leaving behind a stack.
What is the UK’s climate classified as?
Temperate maritime climate.
What is the impact of the North Atlantic Drift on the UK’s climate?
It brings warm waters from the Caribbean, keeping the west coast of the UK warmer.
List the five types of air masses that affect the UK’s weather.
- Polar Maritime
- Arctic Maritime
- Polar Continental
- Tropical Continental
- Tropical Maritime
What effect does strong winter wind have on coastal erosion?
It increases destructive wave power.
Define weathering.
The break-down of rock in-situ without the movement of the material.
What is mechanical weathering?
The physical breakdown of rock.
What process is freeze-thaw weathering?
Water entering cracks freezes, expands, and then thaws, widening the cracks over time.
What is chemical weathering?
The breakdown of rocks through chemical processes, often involving slightly acidic rainwater.
What type of mass movement involves the rapid downhill movement of material?
Fall.
What is soil creep?
The slow movement of soil, less than 1cm per year, often due to freeze-thaw cycles.