It is a mineral used to make types of plaster which coat our homes, schools and offices - and in Cumbria sits the world's deepest gypsum mine. Outside the small village of Long Marton, against the ...

BILLINGS, Mont.— The mining company Grupo Cementos de Chihuahua has withdrawn its plan for gypsum mining exploration in southern Montana’s Pryor Desert. The plan would have disturbed Jurassic Period ...