Main ore lens
Lyell Comstock Pb/Zn mine, Mount Lyell Mines, Queenstown, Queenstown district, West Coast municipality, Tasmania, Australia
The main ore lens in the Lyell Comstock mine, composed mostly of pyrite, with minor galena, sphalerite, bornite, etc. Possibly originally a black smoker submarine hydrothermal vent.
© Ralph Bottrill