Paleoecological significance of Late Quaternary molluscan faunas of the Bahia San Blas area, Argentina

Late Pleistocene–Recent marine malacological assemblages of the Colorado River delta (south of Buenos Aires Province): Paleoecology and paleoclimatology

“…MIS 9 (Fucks et al, 2012b), with the most represented marine fauna being Glycymeris longior, Zidona dufresnei and Buccinanops cochlidium, recorded in this area today. In the area of San Blas Bay (40 S) the same fauna of Anegada Bay is recorded (Char o et al, 2013a with Pitar rostratus and Olivancillaria urceus. In the northeast of the Buenos Aires Province (35 e36 S), deposits of this interglacial have not been preserved (Aguirre and Fucks, 2004).…”

“…Tidal plains of the south of the Province of Buenos Aires are related to the development of the Colorado River and with the coeval geomorphological development related to island and tidal plains formation that affected the Colorado River, Anegada Bay and northern San Blas Bay. In the study area, as well as in Bahía Blanca area , Anegada Bay (Char o et al, 2013b) and north of San Blas Bay (Char o et al, 2013a) the best represented bivalve in low energy marine deposits is Tagelus plebeius. The modern malacofauna of the study area records a higher richness index of species in MIS 1 respect to MIS 5e and !…”

“…The age is assigned on the basis of similarity of geomorphological features with other marine deposits south of this area (Fucks et al, 2012a,b;Char o et al, 2013a). It has little fossiliferous content with Pitar rostratus and Corbula patagonica (bivalves), and Buccinanops and Crepidula (gastropods) (Fig.…”

“…The appearance of Crassostrea rhizophorae in MIS 5e is noteworthy, as a bivalve of Caribbean lineage that currently lives at lower latitudes. In Holocene ridges associated with the postglacial transgression (Weiler, 1988(Weiler, , 1993 that vary between 5.9 and 3.6 ka (Char o et al, 2013a), the marine malacofauna has 75.7% similarity, with the presence of Tagelus plebeius and Corbula patagonica, which are among the most abundant species of low energy environments, coinciding with the Holocene deposits of the Colorado River delta.…”

Nuevos Contextos Funerarios en La Transición Pampeano-Patagónica Oriental (Pcia. De Buenos Aires, Argentina): Aportes Al Holoceno Medio Y Tardío Inicial

“…En tanto, la unidad inferior está compuesta por sedimentos de arena mediana a gruesa, con estructura entrecruzada planar, laminar fina y abundantes valvas de moluscos y rodados (Figura 2B; ver una estratigrafía similar en Fucks et al 2012;Martínez et al 2012b;Weiler 2000). Estos depósitos corresponden a antiguos cordones litorales del episodio de transgresión postglacial, asociados con ambientes de islas de barreras y albuferas (Charó et al 2013;Fucks et al 2012;Weiler 2000). Los últimos episodios transgresivos corresponden al período del Holoceno Medio (ca.…”