Resumo

ENCINAS, Alfonso; BUATOIS, Luis A.  e  FINGER, Kenneth L.. Paleoecological and paleoenvironmental implications of a high-density Chondrites association in slope deposits of the Neogene Santo Domingo Formation, Valdivia, south-central Chile. Ameghiniana [online]. 2008, vol.45, n.1, pp.225-231. ISSN 1851-8044.

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.

Palavras-chave : Ichnology; Trace fossils; Chondrites; Slope; Neogene; Chile.