A Mysterious Layer Deep Inside Earth Could Be Remnants From Its Earliest History

Around 3,000 kilometers beneath our feet, there's a mysterious band of material called the D" layer, which has long fascinated scientists for its lumpiness.Chemical reactions driven by extreme pressures and temperatures at the bottom of this ancient magma ocean might have caused the unevenness we see in the D" layer today, simulations from the international team of researchers indicate.

This peroxide attracts iron, so its presence could explain how iron-rich layers formed where the D" layer sits,"According to our calculations, its affinity to iron could have led to the accumulation of iron-dominant peroxide in layers ranging from several to tens of kilometers thick."

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