IMPLICANCIAS PALEOECOLÓGICAS Y PALEOAMBIENTALES DE UNA ASOCIACIÓN DE ALTA DENSIDAD DE CHONDRITES EN DEPÓSITOS DE TALUD DE LA FORMACIÓN SANTO DOMINGO, NEÓGENO DE VALDIVIA, CENTRO-SUR DE CHILE

Alfonso Encinas, Luis Buatois, Finger Kenneth

Abstract


Neogene marine strata of the Santo Domingo Formation crop out in the vicinity of Valdivia,
south-central Chile (40°S, 73°W). The succession is characterized by dark-gray sandy siltstone with abundant
Chondrites isp. The occurrence of this ichnotaxon and lower-bathyal benthic foraminifers is consistent
with a slope depositional environment. The abundance of Chondrites and the low ichnodiversity reveal
poorly oxygenated bottom waters. The Santo Domingo Formation most likely accumulated in fault-controlled,
intraslope silled minibasins, which werw formed during a major event of Neogene subsidence of
the Chilean margin