%0 Journal Article
%T Las Secuencias Depositacionales del Plioceno-Cuaternario en la Plataforma Submarina adyacente al Litoral del Este Bonaerense
%A Parker
%A Gerardo
%A Violante
%A Roberto A
%A Paterlini
%A C. Marcelo
%A Costa
%A Irundo P
%A Marcolini
%A Susana I
%A Cavallotto
%A Jos¨¦ L
%J Latin American journal of sedimentology and basin analysis
%D 2008
%I Scientific Electronic Library Online
%X the argentina continental shelf (acs) is one of the largest and smoothest silicoclastic shelves in the world, condition that resulted from its geotectonic setting in a passive margin adjacent to a continental region with very extended and low-lying coastal plains. as a consequence, pliocene-quaternary glacio-eustatic sea-level fluctuations have been very important in its modelling and sedimentary characteristics. the study area is located between 35 and 39o s, the western boundary is the coastline and the eastern boundary in around 55o w that includes the outer shelf border (fig. 1). the research is based on middle to high-resolution seismic reflection surveys and bottom/ subbottom sampling (piston cores), carried out in the context of several projects that are part of the framework project "reconocimiento geol¨®gico geof¨ªsico del margen continental". the information obtained during these projects, as well as the results coming from previous projects and bibliographic compilation, allowed to gather around 4.000 km of seismic lines, 1.200 bottom samples and 92 piston cores (fig. 2). morphology: the acs shows two major features (figs. 1 and 3): inner shelf (corresponds to terrace i, parker et al., 1997, 1999; violante, 2005) and outer shelf (northern part of terrace ii, parker et al., 1997; violante, 2005). the inner shelf extends from the coastline (or the prodelta front in the de la plata river outlet) to the 30/40 m isobath, and includes the "rioplatense terrace" (rt) which represents the surface that has been modelled during the postglacial transgression but not covered by the late holocene coastal wedge that constitutes the coastal plains. several lower-order features modelled by the postglacial transgressive and regressive events developed on the rt surface, as the de la plata river delta, the linear shoals systems and the la plata bank (fig. 1). on the other hand, relict features composed of semiconsolidated plio-pleistocene sediments as punta piedras-alto mar¨ªt
%K continental shelf
%K depositional sequence
%K buenos aires littoral
%K marine transgression
%K quaternary.
%U http://www.scielo.org.ar/scielo.php?script=sci_abstract&pid=S1851-49792008000200003&lng=en&nrm=iso&tlng=en