The geologist Robert Shoch visited Easter Island and noted that some of the idols were carved from stone that have no known quarries on the island. He speculated that perhaps the sources of that type of stone were now underwater.
If there was a major sea level rise that inundated the quarries then the statues would predate considerably the estimated 13th century time period of their creation, possibly as early as end of the great ice age ten or eleven thousand years ago.
Thanks, I'd never read what he'd written about Easter Island. Up front, the term "no known quarries" suggests that the quarry or quarries remain undiscovered, or they were very small and quarried out, or, and this isn't all that unlikely, the information is faulty. Schoch is smart, but he's been falling under the influence of some folks who greatly exaggerate the ages of things. The sediment cores taken on the island show that the island was unoccupied by humans until really not all that long ago.
https://www.newdawnmagazine.com/articles/the-mystery-of-gobekli-tepe-and-its-message-to-us
http://www.robertschoch.com/articles/schochgobeklitepenewdawnsept2010.pdf