In two different expeditions Heyerdahl and Ferdon (1961) and John Flenley (1984) found outstanding amounts of palm tree pollen in the crater sediment of Rano Raraku and Rano Kau, Easter Island. The microscopic analysis of this fossil pollen shows a great similarity to fresh pollen of Jubaea chilensis, (Molina) Baillon.
"Jubaea, The Palm of Chile and Easter Island?,"
Rapa Nui Journal: Journal of the Easter Island Foundation: Vol. 10
, Article 3.
Available at: https://kahualike.manoa.hawaii.edu/rnj/vol10/iss2/3