Late Quaternary in an estuarine system: geomorphological, stratigraphic and paleontological indicators

ALIOTTA, SALVADOR; GINSBERG, SILVIA SUSANA; GIAGANTE, DARÍO; SPAGNUOLO, J.O.; FARINATI, ESTER; VECCHI, LAURA .

Geologic Epochs

Academy Publish

Lugar: Wyoming; Año: 2011;

The decisive influence of Late Quaternary sea level changes on the geological evolution of the coastal plain and adjacent continental shelf around the world has long been recognized. Coastal environments evolve actively during transgressive–regressive cycles whose development depends on sea level and sediment supply variations. The interaction of these variables was key to the current morphological and sedimentological configuration of coastal regions. Particularly, the estuarine system of Bahía Blanca (Argentina) presents various types of deposits and marine fossils accumulations, such as paleochannels in the subbottom, sand-shell ridge and extensive levels with fossils in life position. These evidences are mportant geological indicators, because its analysis allows us to define different conditions paleoenvironmental that prevailed during the coastal evolutionary process.