2021
DOI: 10.1590/2317-4889202120200065
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Abstract: The Santa Vitória Formation is a lithostratigraphic unit known for its fossil assemblage of Pleistocene mammals, established in 1973 from sediments exposed along the banks of Chuí Creek, in the southern coastal plain of the state of Rio Grande do Sul (CPRS), Brazil. The original description was presented in a Masters' dissertation and never formally described in a peer-reviewed publication. Moreover, surveys and fossil collecting efforts developed in the last decade have led to a better understanding of its or… Show more

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Cited by 6 publications
(14 citation statements)
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“…1). Its formation is related to fluvial and eolian deposits from the Middle–Upper Pleistocene (Lopes et al 2021). Pleistocene sediments are mainly composed of quartz sediments as well as silty-clay sediments (Buchmann et al 2009).…”
Section: Methodsmentioning
confidence: 99%
“…1). Its formation is related to fluvial and eolian deposits from the Middle–Upper Pleistocene (Lopes et al 2021). Pleistocene sediments are mainly composed of quartz sediments as well as silty-clay sediments (Buchmann et al 2009).…”
Section: Methodsmentioning
confidence: 99%
“…The relief is smooth and low (<25 m), the highest altitudes corresponding to coastal barriers, intercalated with flat lowlands of the lagoon systems. Chuí Creek cuts across sedimentary deposits of the Lagoon System III, and the fossils are found in shallow (<1 m) fluvial channel deposits of the Santa Vitória Alloformation (Lopes et al, 2021) exposed along the banks of the creek.…”
Section: Regional Settingmentioning
confidence: 99%
“…The relative 18 O enrichment in Megatherium and the other species from Chuí Creek that ingested variable proportions of C3/C4 plants (Figure 3) could indicate that they lived during periods of increased subtropical rainfall, or that they drank mostly from water sources enriched due to evaporation under warm or dry conditions (Luz & Kolodny, 1989;Ayliffe et al, 1992). The shallow, rain-fed fluvial systems of the Santa Vitória Alloformation (Lopes et al, 2021) had their isotopic composition controlled by rainfall, but stagnant water sources such as ponds or small lakes were likely subject to evaporative enrichment. The Megatherium from Pessegueiro Creek also may have obtained most of its water from sources fed by 18 O-enriched rainfall, or from evaporatively enriched ponds or lakes associated with the grasslands where it foraged.…”
Section: Oxygen Isotopes In Megatherium and Eremotheriummentioning
confidence: 99%
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“…The abundant fossil record of mammals from the Lujanian South American land-mammal age in LBS III (ca. 33 ka; Lopes et al, 2021) also constrains the timing of deposition to the late Pleistocene. The last glacial maximum (LGM) (e.g., Clark et al, 2009) peaked at ca.…”
Section: Introductionmentioning
confidence: 99%