The blue area is about 250 km thick and, based on new findings reported in Nature, is composed of a 3-billion-year old craton underlain by younger lithosphere deposited as ocean floor subducted ...

Experts suggest that decratonisation may result from subduction, where one denser mantle layer is forced under ... disintegration of the North China Craton (NCC) and nearby areas in the western ...

There were frequent volcanic eruptions and, because there was no free oxygen in the atmosphere, there was no ozone layer. It was a ... One example is the Singhbhum Craton, in the Daitari ...