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But then the tree pollen declined, and flecks of charcoal appeared in the peat core indicating that the forests had been burnt, presumably by man.
And from this the theory arose that the forests had been destroyed by the arrival of the Easter Islanders, and that this led to an ecological disaster.
Stegodons are a commonly recovered extinct proboscidean (elephants and allies) from the Pleistocene record of Southeast Asian oceanic islands.
Estimates on when stegodons arrived on individual islands and the timings of their extinctions are poorly constrained due to few reported direct geochronological analyses of their remains.
The erection of statues was in full swing by AD 1200 and the collapse came around AD 1500.We desperately need more reliable radiocarbon dates, particularly for the overthrow of the statues and for the activities on Orongo.