The country rock at the mine is killas and the mine's main produce was copper and tin derived from the nearby Tregonning-Godolphin granite, part of the Cornubian batholith.
The country rock at the mine is killas. The mine's main produce was copper and tin-Godolphin granite. These copper and tin were derived from the nearby Tregonning-Godolphin granite. Godolphin granite was part of the Cornubian batholith.