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Donkey Rock Geology Area

May 6, 2010

Just to the south of Broughton in Furness is something about 400 million years old. Formerly Eccleriggs Quarry, Donkey Rock is a strange sight.

Donkey Rock. Broughton in Furness.

70 metres across and 10 metres high, quarrying has exposed this huge slab of ancient Silurian rock. The “bumps” are known as sole structures and the wall has a red shade caused by haematite or iron ore.

Donkey Rock

Once a shallow tropical sea it was the currents in the water that caused hollows that over time filled with iron rich deposits that hardened into solid rock. The movement of the Earth later pushed the layers into an upright position.

Donkey rock can be a bit difficult to find so I would suggest popping into the very helpful tourist Information Centre in Broughton which is situated in the old town hall, on the square. Open year round, although shorter hours in winter. Tel. 01229 716115.

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