Filey’s Lost Valley – A foundation of Boulder Clay
Filey Town on top of Boulder Clay Cliffs
Carr Naze Boulder Clay Cliffs
Boulder Clay Cliffs at Arndale near sailing club
Over ten thousand years ago, the Site of Filey was a large valley, with the Rocks of Filey Brigg forming the remains of one side of the valley. Enormous Glaciers of Ice up to 2km thick deposited a thick layer of boulder clay which filled the valley, producing soft cliffs, which were eroded over thousands of years to form Filey Bay. The Town of Filey now stands more than 30 metres above the original valley bottom on top these boulder clay glacial deposits.
The boulder clay is a major feature of most of the Yorkshire Coast, it is easily eroded by the sea and subject to cliff slumps, resulting in one of the most rapid erosion rates in England on the Holderness Coast.
Every year thousands of tons of the clay and the stones and boulders in it, is eroded by the weather and sea, constantly renewing Filey Bay’s sands, as the boulders and stones are gradually eroded by the sea’s action.
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