Researchers discover vast ancient gold mines in Spain, the ...
Nov 25, 2014· Roman military commander and author Pliny the Elder oversaw mining in Hispania, and recorded that systems (known as ruina montium, or the wrecking of mountains ) were mimicked from those long employed in North Africa. In his Naturalis Historia, Pliny the Elder wrote of the Roman mining techniques: What happens is far beyond the work of giants.