Late Miocene onset of the Amazon River and the Amazon deep-sea fan: Evidence from the Foz do Amazonas Basin: COMMENT

[Figueiredo et al. (2009)][1] analyzed sediments from two cores taken northeast of the mouth of the Amazon River and concluded that the Amazon River formed through a three-stage sequence beginning at 11.8–11.3 Ma. This hypothesis conflicts, in part or wholly, with virtually every other recent