This hypothesis is based on the fact that the rock called blueschist began to appear 700 to 800 million years ago. Geoscientists at Johannes Gutenberg University Mainz (JGU) in Germany have now ...

The material from which blueschist is made, includes basalt and other rocks, reached depths of nine to eighteen miles, where the temperature was between 400- and 900-degrees. Blue Rock sits on a ...

Furthermore, scientists have found blueschist rock at the bottom of deep wells; that's "a metamorphic rock only revealed when regurgitated to the surface via geologic upheaval," and it suggests ...

This hypothesis is based on the fact that the rock called blueschist began to appear 700 to 800 million years ago. Geoscientists at Johannes Gutenberg University Mainz (JGU) in Germany have now ...