All the ore produced by the mine came from the Greenside Vein, a mineral vein which filled a geological fault running in a north-south direction under the east ridge of Green Side, a mountain in the Helvellyn range, near the head of Ullswater.
All the ore produced by the mine came from the Greenside Vein. The Greenside Vein was a mineral vein-south direction under the east ridge of Green Side near the head of Ullswater. This mineral vein filled a geological fault. This geological fault was running in a north. South direction under the east ridge of Green Side was a mountain in the Helvellyn range.