This photo shows researchers doing field sampling of a pyrite-rich black shale outcrop in China. The weathering of such sediments, which contain sulfur originally buried from the ocean ...

Although black shale is the dominant lithology, it also contains lighter shales and interbedded limestone layers due to sea level variation during its deposition almost 400 million years ago.

Octava’s two metallurgical holes confirm historical rare earth and lithium hits from Byro project’s black shale Black shale ...