New study suggests gigantic masses in Earth’s mantle untouched for more than 4 billion years

September 24, 2019 - General

Ancient, distinct, continent-sized regions of rocks, isolated since before the collision that created the Moon 4.5 billion years ago, exist hundreds of miles below the Earth’s crust, offering a window into the building blocks of our planet, according to new research.

This image shows the divisions between Earth’s layers. The ancient, continent-sized rock regions
encircle the liquid outer core [Credit: Lawrence Livermore National…

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Source: archeo

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