The Bahia Blanca Estuary, Argentina
2001; Springer Nature; Linguagem: Inglês
10.1007/978-3-662-04482-7_15
ISSN2196-971X
AutoresGerardo M. E. Perillo, María Cintia Piccolo, Elisa R. Parodi, R. H. Freije,
Tópico(s)Geology and Paleoclimatology Research
ResumoBahía Blanca is a mesotidal coastal plain estuary in the southwest of the Buenos Aires Province, Argentina. The estuary represents the remaining part of a complex delta, formed by the Desaguadero river (Perillo 1989), which once extended over almost 200 km from the northern coast of Bahía Blanca to Bahía San Blas (Fig. 14.1). The Principal Channel of the modern estuary approximately corresponds to the principal valley of the late Pleistocene-early Holocene delta complex, which was formed by a now vanished river and its tributary, the Colorado River (or one of its arms). The southward migration of the Colorado River subsequently carved the other major channels (i.e., Falsa, Verde, and Brightman bays) of the estuary (Perillo 1989). The modern Bahía Blanca Estuary extends over about 2,300 km2 and is formed by several tidal channels (740 km2), extensive tidal flats (1,150 km2) with patches of low salt marshes, and islands (410 km2; Montesarchio and Lizasoain 1981). Owing to marked differences in surface morphology, the area can be divided along the northern shore of Falsa Bay into a funnel-shaped northern part, characterized by the Principal Channel and many small tidal creeks, and a southern part, dominated by the Falsa, Verde, and Brightman bays (Perillo and Piccolo 1999; Fig. 14.1).
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