Scientists have discovered an ancient ocean floor between Earth's core and mantle.
A massive ocean floor lurks near Earth's core. Now, seismic imaging has revealed that it likely surrounds much — if not all — of the core.
"Only [approximately] 20% of the core-mantle boundary has been previously investigated for ULVZs, which have not been identified in all of these locations," lead study author Samantha Hansen , an associate professor of geological sciences at The University of Alabama, told Live Science in an email."It is possible that this anomalous material covers the entire core."
This ancient ocean layer likely developed when Earth's tectonic plates shifted, causing oceanic material to be carried into the planet's interior at subduction zones, the areas where two plates collide and force one to dip beneath the other. Over time,"accumulations of subducted oceanic material collect along the core-mantle boundary and are pushed by the slowly flowing rock in the mantle," according to a statement .
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