RT Journal Article
T1 Subantarctic macrotidal flats, cheniers and beaches in SanSebastian Bay, Tierra Del Fuego, Argentina
A1 Vilas Martín, Federico
A1 Arche, Alfredo
AB San Sebastian Bay is a large, semicircular coastal embayment situated on the Atlantic coast of Tierra del Fuego,Argentina. It is a high-energy, subantarctic environment with a tidal range of 10.4 m, influenced by large waves of Atlanticand local origin and swept by constant, strong westerly winds. A 17 km long gravel spit protects the Northern part of theBay giving rise to a gradient in sedimentary processes. From south to north, are seven distinct sedimentary environments.Coastal sedimentation started at least 5200 years before present BP. and a rapid progradation related to a relative sea-leveldrop has infilled about 6 kilometres of the Bay with a sedimentary sequence 10–11 m thick. 14-C dating of unabraded shellsin the Chenier ridges of the relict part of the complex allows for a precise reconstruction of the stages of the progradation,that has slowed from 2.35 mryear at 5000 years BP to 0.6 mryear at present. The possible causes of the sea-level drop arediscussed.
PB Elsevier Science B.V.
SN 0025-3227
YR 1999
FD 1999
LK https://hdl.handle.net/20.500.14352/57794
UL https://hdl.handle.net/20.500.14352/57794
LA eng
DS Docta Complutense
RD 12 may 2025