Practice Questions

Question 1

2 geological factors influencing a CL

Answer 1

Headland and bays r formed on concordant coasts, where there are bands of hard and soft rock perpendicular to a CL, bays erode faster that HL

Unconsolidated material- their lithology means that material isn’t bonded together, more erosion during high energy waves, increasing coastal recession

Question 2

Landform for deposition and transportation

Answer 2

Spits are ling narrow ridges of sand that is attached to the land at 1 end

Bar formation

Question 3

Eustatic SL change makes a sig contribution to coastal recession
Theme 1 - rising eustatic SL

Answer 3

Long term sea level change results from rising Eustatic SLR which can be facilated by thermal expansion, which leads to more ice sheets melting as a result of seawater warming. This can lead to faster erosion of the beach, this can cause waves to hit the back shore,exploits the weakness of the rock strata, exposes cliffs to Marine erosion which then makes them more susceptible to erosion, weathering and mass movement.

However, eroded material can contribute to a negative feedback system, to maintain dynamic equilibrium, eroded material can absorb wave energy at the base of the cliff and halt recession temporarily.

Overall, rising eustatic sea level change makes it harder for beaches to build up as the waves continue to erode beach material, which reducing the width of the beach, meaning more energy is being concentrated at the cliffs, accelerating coastal recession.

Question 4

Eustatic SL change makes a sig contribution to coastal recession
Theme 2- lithology

Answer 4

Primary determinant determining potential for erosion.
E.g. lithology such as unconsolidated material can affect coastal morphology which makes a CL more susceptible to recession. In particles, unconsolidated material , r more less resistant to erosion as it’s easier for water to permeate, making them more porous which are features of a submerge coastline characterised by valentines classification where erosion dominates dominates.

Howver without rising eustatic sea level increasing as. Result of thermal expansion which in part is exacerbated by climate change, the litholgy of the rock used remain unaffectedprevening faster erosion rates.

Conc= rising SL dictates the pace and magnitude of recession more than litholguy