We had that story in our head...when you see it there on a table," says Natsue Abe, a petrologist at Japan Agency for Marine-Earth Science and Technology.
The expedition's achievements are a 'fantastic landmark'...samples of Earth's deep interior are key to understanding our planet's formation and evolution," says Rosalind Coggon, a marine geologist at the University of Southampton.
Geoscientists worry about limited follow-up studies as the International Ocean Discovery Program is ending and the US is retiring research ship JOIDES Resolution.
Oceanic crust, mainly under seas, is dense basalt recycled by tectonic plate movements, contrasting with younger, thinner continental crust.
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