“…Various authors (Dueñas, 1980;Monsh, 1998;Jaramillo and Dilcher, 2000;Pardo-Trujillo et al, 2003;Helenes and Cabrera, 2003;Silva, 2004;Jaramillo et al, 2007;Latrubesse et al, 2007) have indicated that the climate in the Amazonia region and north of South America, was, in general, hot and wet during the Middle/Late Miocene. This interpretation is justified by the marked presence of Gramineae, Palmae, and aquatic algae, as well as the presence of crocodilians, which are unequivocal indicators of floodplain environments (Riff et al, 2010).…”