|From L-R: Prof Mike Stephenson, Clive |
Mitchell and Dr Katherine Daniels from BGS
in the Boulby Underground Lab
|From L-R: Polyhalite (hydrated potassium, magnesium, sodium sulphate - this will eventually take over from potash as the|
main output of Boulby Mine. Halite (rock salt, sodium chloride) from roadway at 1100m depth in Boulby Potash Mine.