Researchers have uncovered remnants of an ancient seafloor below the Pacific Ocean that may change our understanding of Earth's history and tectonic processes.
'Our discovery opens up new questions about how the deep Earth influences what we see on the surface across vast distances and timescales,' said Jingchuan Wang.
'This thickened area is like a fossilized fingerprint... that subducted into the Earth approximately 250 million years ago,' remarked Wang, revealing insights into ancient seafloor dynamics.
The unusual thickness of the region suggests the presence of colder material... indicating that some oceanic slabs get stuck halfway down the mantle.
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