Several samples of fossilized wood (charcoal) were collected in the Papayita archaeological site. in coastal Ecuador. This carbonized material was encountered inside a layer of volcanic ash that sealed the site. The ash-sized tephra was produced by a sub-Plinian eruption from the Guagua Pichincha volcano contemporaneous with the late Valdivia phases during the Formative Period. https://www.alarecre.com/