Location

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Situated approximately 3km south of Hornsea lies the village of Mappleton. Supporting approximately 50 properties, the village has been subject to intense erosion at a rate of 2.0m per year, resulting in the access road being only 50m from the cliff edge at its closest point.

Geology
Mappleton lies upon unconsolidated till. This material was deposited by glaciers during the last ice age 18,000 years ago.

Coastal Features
The two rock groynes at Mappleton have helped develop wide and steep sandy beaches.

Coastal Management
In 1991 almost £2 million was spent on two rock groynes and a rock revetment to protect Mappleton and the B1242 coastal road. Blocks of granite were imported from Norway for the sea defences. The purpose of the two rock groynes was to trap beach material. As the result of the coastal management a substantial beach accumulated between the groynes halting erosion.

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However, further south the rate of erosion has increased significantly. This is because material which is being carried south is not being replaced (it is trapped within the groynes). Therefore there is no beach to protect the cliffs. Even during a neap tide ( a tide which is 30% less than the average tidal range) the sea reaches the base of the soft cliffs and erosion occurs.