Finding one of the world’s largest deposits of iron ore in a remote corner of the Amazon rainforest was something of an accident, according to mining-technology.com. In 1967, a helicopter carrying a team of geologists from a Brazilian subsidiary of U.S. Steel landed on a barren hilltop to refuel. The geologists recognized iron ore on the surface of the hill, and four decades later, one of the world’s largest iron ore mines had taken its place.
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