Researchers are still working to understand how soft tissues in fossils like K. susanae are preserved in the Soom Shale. Clay minerals may have played a role, as could calcium phosphate, a compound ...

Researchers highlight that the shale studied underwent extensive heating, which could have greatly affected how lithium moved during the change from smectite to illite clay minerals. Even small ...

Oil shale is a form of sedimentary rock that contains kerogen, which is released as a petroleum-like liquid when the rock is heated. Tar sands are a combination of clay, sand, water and bitumen, which ...