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Ancient Remnants of Long-Lost Tectonic Plate Revealed in Borneo

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Geologist Suzanna van de Lagemaat reconstructs a 120-million - year-old tectonic plate once a quarter the size of the Pacific .

She found tell-tale signs of the ancient plate in rock formations she studied in northern Borneo .

The researchers estimate the ancient Pontus plate spanned one-quarter of the present-day Pacific Ocean .

The study has been published in Gondwana Research .