CRUST FORMATION

Plateaus from seafloor spreading

Ocean-floor plateaus are not voluminous lava flows from central volcanoes as thought, but anomalously thick oceanic crust, suggest magnetic anomaly patterns from the Shatsky Rise, in the northwestern Pacific Ocean.

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Fig. 1: Large marine plateaus and onshore provinces formed since 200 million years ago.

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Correspondence to Joanne M. Whittaker.

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