L2- How Hard Is Diversity?

Question 1

Which two factors can create: caves, arches, stacks and stumps along a headland?

Answer 1

Weathering and erosion

Question 2

What is the difference between concordant and discordant coastlines?

Answer 2

Concordant coastlines have the same rock type which run parallel to the coast whereas discordant coastlines have bands of differing rock types running perpendicular to the coast.

Question 3

Which rock type resists erosion: granite or clay?

Answer 3

Granite- it is an igneous rock and so it is much harder than clay which is a sedimentary rock therefore harder rocks will resist erosion.

Question 4

Which type of coastline would you find headlands at?

Answer 4

Discordant coastlines

Question 5

How is a cave formed?

Answer 5

The weakest areas are vulnerable to erosion and get attacked by waves and opened to form a cave.

Question 6

What triggers the process of stack formation?

Answer 6

Hydraulic action- Waves hitting the rock forces/squeezes them into the cracks of the cliff.

Question 7

Name the two rock types you would find at concordant and discordant coastlines?

Answer 7

Soft rock and hard rock

Question 8

In terms of wave refraction, which high energy zone is most vulnerable to erosion?

Answer 8

Headlands

Question 9

Why do more landforms occur at discordant coastlines?

Answer 9

Discordant coastlines consist of headlands and bays (uneven) and when waves refract on the coastline, erosion of the headland takes place which includes, caves, arches, stacks and stumps occurring.

Question 10

Why does a stack collapse from the headland at discordant coastlines?

Answer 10

As the roof of the arch continually undercut, it eventually collapses leaving a single stack

Question 11

Which order are the two rock types in featuring at concordant coastlines?

Answer 11

Hard rock (granite) is more towards the coastline and soft rock (clay) is more inland.

Question 12

Why do concordant coastlines stand as a barrier to erosion more than discordant coastlines?

Answer 12

The hard rock stands as a protective layer for the soft rock which is why erosion occurs less at concordant coastlines whereas headlands are more likely to get eroded at discordant coastlines.

Question 13

What kind of coastline features at The purbeck coast of Dorset?

Answer 13

Discordant coastline

Question 14

What is wave refraction?

Answer 14

As waves approach the coast they are refracted so their energy is concentrated around headlands (at discordant coastlines) and reduced around bays.