This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
The Quarterly journal of the Geological Society of London . COLLIN'S OZI THE GEOLOGY Figs Crosssections of the South Lode at Bio Tinto showing profiles of the ground removed Scale to Pig Sec tion at SanInocente Shaft Figs respectively metres to the East Fig Fi FiR Fi Porphyry Slate Pyrites Porphyry worked