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Sor Range Collieries. Location: 16km east of Quetta: Coal Field: Degari SorRange: Geological Horizon: Eocene: Type of Coal: SubbituminousA to high volatile Bbituminous: Caloric Values: 4, 930 to 6, 100 kcal: Mining System: Long wall system: Leased Area: 1, 674 acres ...