A geography group used Fig. 1 to map a discordant coastline where bands of resistant granite alternate with softer clay. They walked along the cliff-top pat...

Assessment: Geography 9230 | Paper 1 Mock 01 | Written Paper 1 Subject: Geography - 9230

Question 1 Report

9230-p1-coast-discordant-map-8

A geography group used Fig. 1 to map a discordant coastline where bands of resistant granite alternate with softer clay. They walked along the cliff-top path and noted that the sea enters the clay bands much farther than the granite bands. Their map will be used in a local landscapes study.

(a) Which rock type in Fig. 1 is likely to form a headland? [1]
(b) Outline why bays form in the softer rock bands. [2]
(c) Draw a plan view that shows a bay, two headlands and wave refraction. [2]

Answer Details

(a) Granite / resistant rock [1] (b) Clay is less resistant and is eroded faster [1]; the coastline retreats there to form an indentation / bay [1] (c) Award [1] for bay between projecting headlands; [1] for wave crests bending to converge on headlands and spread in the bay.

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