SciELO - Scientific Electronic Library Online

 
vol.35 número1Edad triásica de la Formación Pular de ambiente continental, Sierra de Almeida, Antofagasta, Norte de ChilePistas de dinosaurios terópodos del Cretácico Inferior de la Formación Chacarilla, Norte de Chile índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Revista geológica de Chile

versión impresa ISSN 0716-0208

Resumen

RIVADENEIRA, Marcelo M  y  CARMONA, Erico R. A Late Pleistocene macrobenthic assemblage in Caleta Patillos, northern Chile: paleoecological and paleobiogeographical interpretations. Rev. geol. Chile [online]. 2008, vol.35, n.1, pp. 163-173. ISSN 0716-0208.  http://dx.doi.org/10.4067/S0716-02082008000100008.

In the present study, we describe and analyze the structure of a Late Pleistocene (likely last interglacial) marine macrobenthic assemblage in Caleta Patillos (20°45'S, 70°12'W), northern Chile. A taphonomic analysis suggests the existence of a shallow subtidal paleonvironment, mainly soft-bottom, of high energy and intense mixing from several benthic habitats. The total number of 38 taxa recorded, mainly gastropods and bivalves, was not different than the ones reported in other Late Pleistocene assemblages in northern Chile. At a biogeographic scale, the composition of mo Husk species showed remarkable similarities with present-day fauna, and no extralimital species were recorded. At local scale, however, a comparison with the living assemblage in the same area of study showed a dramatic shift in the species' composition, a result that cannot be explained by sampling bias. A deep and perhaps very recent (i.e., at historical times) alteration of the structure of local macrobenthic assemblages is hypothesized

Palabras clave : Late Pleistocene; Fossil assemblage; Caleta Patillos; Mollusks; Northern Chile.

        · resumen en Español     · texto en Inglés     · pdf en Inglés