An international research group has succeeded for the first time in measuring the viscosity that molten solids exhibit under the pressure and temperature conditions found in the lower earth mantle. The data obtained support the assumption that a bridgmanite-enriched rock layer was formed during the early history of the earth at a depth of around 1,000 kilometers.
Click here for original story, Viscosity measurements offer new insights into Earth’s mantle
Source: ScienceDaily