photo credit: Craig Chesek, © American Museum of Natural History

At the 6000 foot level (6000 feet below the surface) of the Kidd Creek Cu-Zn mine, in Timmins, Ontario, Canada. I'm pointing out a 4 inch-wide vein of copper-rich sulfide ore; a sample of this variety of Kidd Creek ore was collected for display in the Gottesman Hall of Planet Earth.