Research is currently being carried out to bring you details of Bulbs heritage
Alum mining is probably the reason for the existence of Bolby, with quarrying being the original method of extraction from the ground.
Times have a moved as they say and now a modern mine known as "Cleveland Potash" extends over a distance of 15 kilometres from north to south, and has roadways used by
maintenance vehicles and diesel transit vans are used to transport personnel to and from their working places.
Cleveland Potash produces approximately one million tonnes of potash for agricultural uses and over half a million salt (halite) used for de-icing roads in winter.
The potash, salt and other evaporite minerals encountered at Boulby Mine were deposited in late Permian age, some 230 million years ago.
The minerals were deposited as a result of evaporation of the Zechstein Sea and the potash is located at depths between 1,200 and 1,500m in a seam of 0–20m but averaging 7m in thickness.
The deposits include nodules of boracite and associated mineral sized up to 1 metre in diameter which are found in a bed just above the base of the potash deposit.
Boracite also occurs in a variety of forms from single crystals to aggregates. The rarer hilgardite is occasionally found, whilst magnesite occurs sparingly as transparent plates.
The company employs approximately 850 people and has annual sales of £90 million , however despite all this industrial activity, Boulby Mine is discreetly located with the chimney being the only prominent landmark.
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