Boulby’s two shafts are 1,100m deep and lead to hundreds of miles of roadways which descend even further down into the earth. The mine was opened as a potash mine and the rock salt was produced ...
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See inside huge Boulby Mine where England's gritters get their saltBoulby's two shafts are 1,100m deep and lead to hundreds of miles of roadways which descend even further down into the earth. The mine was opened as a potash mine and the rock salt was produced as ...
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