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Brazil's claim for the Rio Grande Rise.

One of the most significant deep-sea mining negotiations is underway at the Commission on the Limits of the Continental Shelf

One of the most significant discussions in deep-sea mining is happening not a the International Seabed Authority, but in the offices of the Commission on the Limits of the Continental Shelf at the United Nations’ headquarters in New York. The CLCS is responsible for assessing outer continental shelf claims, those portions of a nation’s continental […]

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Cut rock samples from the Rio Grande Rise show Fe-Mn crusts (black and gray) growing on various types of iron-rich substrate rocks (pale to dark brown). Photo credit: Kira Mizell, USGS.

A lost continent rich in cobalt crusts could create a challenging precedent for mineral extraction in the high seas.

The Rio Grande Rise is an almost completely unstudied, geologically intriguing, ecologically mysterious, potential lost continent in the deep south Atlantic. And it also hosts dense cobalt-rich crusts. The Rio Grande Rise is a region of deep-ocean seamounts roughly the area of Iceland in the southwestern Atlantic. It lies west of the Mid-Atlantic Ridge off […]

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