How is pillow lava evidence of sea-floor spreading?

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asked Oct 13, 2016 232k views

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Innochenti · Answer 1 · 2016-10-18T09:53:46+0000

Pillow lava are round concentrations of igneous rock, which are metal-rich sediments. These metal-rich sediments are found in newly formed sea floors, which provides evidence of the floors spreading.

How is pillow lava evidence of sea-floor spreading?

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