Examining how plates move in Earth's mantle and how mountains form is no easy feat. Certain rocks that have sunk deep into Earth's interior and then returned from there can deliver answers.
Geoscientists analyze rocks in mountain belts to reconstruct how they once moved downwards into the depths and then returned to the surface. This history of burial and exhumation sheds light on the mechanisms of plate tectonics and mountain building. Certain rocks that sink far down into Earth's interior together with plates are transformed into different types under the enormous pressure that prevails there.
Do tectonic plates move because of motion in the Earth's mantle, or is the mantle driven by the plates' movement? Or could it be that this question is ill-posed? This is the point of view ... The well-known sources of the magnetic field that surrounds Earth are the deep inside core and Earth's crust. Earth's mantle, on the other hand, has been considered to be 'magnetically ...
As ancient ocean floors plunge over 1,000 km into the Earth's deep interior, they cause hot rock in the lower mantle to flow much more dynamically than previously thought, finds a new study. The ...Bizarre New Fossils Shed Light on Ancient Plankton
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