Upper Quaternary Palaeoclimates of the Mar Chiquita area, North Pampa, Argentina
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The geomorphology and Late Quaternary sedimentary record of the Salado/Juramento fluvial megafan, Central Andes foreland basin (Chaco Plain, Argentina)
2021, GeomorphologyCitation Excerpt :The SJRM interacted during some events of the Quaternary with the Bermejo megafan to the N and with the Dulce megafan to the S (Fig. 1). The Dulce River flows into the inland Mar Chiquita Basin (ca. 75,000 km2), a Quaternary tectonic depression occupied by the Mar Chiquita Lake, located in the transition between the Southern Chaco and the North Pampa (Kröhling and Iriondo, 1999; Fig. 1). Most of the Dulce megafan is coalescent with the southwestern part of the SJRM, comprising a complex network of palaeochannels of both formative rivers that in general are covered by loessic deposits (Kröhling and Iriondo, 1999; Carignano et al., 2014).
Paleolimnological record of the Pampean plains (Argentina) as a natural archive of South American hydroclimatic variability since the LGM to the Current Warm Period
2020, Quaternary Science ReviewsCitation Excerpt :At a larger regional scale in SESA but with noticeable differences in the timing of glacial conditions (between 35,000 and 18,200 cal yr BP), dry conditions were inferred from the paleolimnological analysis of Lake do Saci (9°S) in the Brazilian Amazonia (Fontes et al., 2017). In particular, the LGM record along the Argentinean Pampean region, was characterized from loess sequences and alluvial sediments (Bonadonna et al., 1999; Gili et al., 2017; Iriondo, 1997; Kröhling and Iriondo, 1999; Muhs and Zárate, 2001; Prieto et al., 2004; Torre et al., 2019a,b; Zárate, 2003; Zárate and Tripaldi, 2012; Zech et al., 2017). Reconstructions indicate the development of a cold and dry period in agreement with the reconstructed scenario from LMC.
Hydrogeochemistry of a small saline lake: Assessing the groundwater inflow using environmental isotopic tracers (Laguna del Plata, Mar Chiquita system, Argentina)
2019, Journal of South American Earth SciencesCitation Excerpt :In this sense, the water column from the shallow Laguna del Plata is also well mixed due to the strong winds that occur in the region (Stupar, 2013). The Laguna Mar Chiquita occupies a tectonic depression that formed during the middle Pleistocene (Krohling and Iriondo, 1999). The origin of this closed basin is the uplift of the San Guillermo High due to the activation of the Tostado fault in the middle Pleistocene, and the accumulation of the Suquía and Xanaes fans against it (Mon and Gutiérrez, 2009).
The southernmost record of a large erethizontid rodent (Hystricomorpha: Erethizontoidea) in the Pleistocene of South America: Biogeographic and paleoenvironmental implications
2018, Journal of South American Earth SciencesCitation Excerpt :The sedimentary characteristics, deposits with sandy levels and facies of small conglomerates, indicate a fluvial origin for the Timbúes Formation generated by the Carcarañá River and indicate the position of its previous mouths into the Paraná River (Iriondo and Kröhling, 2009; Vezzosi et al., 2017). Thermoluminescence radiometric ages from the middle section of the upper unit (i.e., Carcarañá Formation) upstream to the fossiliferous area, as well as in the same stratigraphic position outside of the area (i.e., Marull Fluvial Sands), indicated that the upper deposits of the sequence were deposited during the late Pleistocene (45–52 kyr BP; Kröhling, 1999; Kröhling and Iriondo, 1999; Iriondo, 2010). Thus, the fossiliferous horizon underlying the Carcarañá Formation (Vezzosi, 2015) is assigned to the Upper Pleistocene (Global Stage/Age; Cohen et al., 2013; updated).