Ghosts of oceans past

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Andrea Dutton's hunt for ancient coral reefs has taken her from white sand beaches along the Indian Ocean to wave-beaten cliffs beside the Caribbean. But the geologist's strangest field trip may have come last year, when she spent days at a Mexican amusement park carved from the seaside jungle of the Yucatán Peninsula.

 

https://www.sciencemag.org/content/350/6262/752.full