Geology and Paleontology of the Quaternary of Uruguay

Ubilla, Martı́n; Martínez, Sérgio

doi:10.1007/978-3-319-29303-5

Cited by 38 publications

(27 citation statements)

References 22 publications

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“…The Late Pleistocene alluvium is an extensive brown to green sedimentary silt, identified throughout Uruguay. It is generically called the Sopas (Castiñeira et al 2010), Sopas-Dolores (Panario and Gutiérrez 1999), or Dolores Formation (Martínez and Ubilla 2004), but because such formations show differences in sedimentological composition and tonalities (e.g., Antón 1975;Bossi 1966; Martínez and Ubilla 2004;Ubilla 1999;Ubilla and Martínez 2016;Ubilla et al 2011Ubilla et al , 2017, there is no agreement concerning its characterization. Similar deposits in southern Brazil were dated ∼12.8-15.0 radiocarbon years BP by Antón (1975).…”

Section: Geological Contextmentioning

confidence: 99%

“…Similar deposits in southern Brazil were dated ∼12.8-15.0 radiocarbon years BP by Antón (1975). In southern and midwestern Uruguay, radiocarbon dates from bone and wood samples extracted from Sopas-Dolores deposits yielded dates of ∼11,600-10,000 radiocarbon years BP (Martínez and Ubilla 2004;Ubilla 1999;Ubilla and Martínez 2016;Ubilla et al 2011Ubilla et al , 2017. The Sopas-Dolores deposits show similarities to the Lujanense deposits, which is considered a useful horizon marker for the Late Pleistocene and Early Holocene of the Buenos Aires province, Argentina (Toledo 2011;Tonni et al 2003).…”

Section: Geological Contextmentioning

confidence: 99%

“…In all three areas, these deposits are similar in fauna composition, including extinct megafauna, and contain the Paleoindian record. All are characterized by biomes of open vegetation (Bombín 1975;Martínez and Ubilla 2004;Ubilla and Martínez 2016). Overlying the Sopas-Dolores are Holocene deposits of recent alluvium (Antón 1975;Bossi 1966;Bossi and Navarro 1998).…”

Section: Geological Contextmentioning

confidence: 99%

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Luminescence Dating of Late Pleistocene and Holocene Sediments in Uruguay

Nami

2018

Latin Am. antiq.

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The archaeological record in the Negro River in central Uruguay Republic is remarkable for its richness, including the presence of a significant number of Paleoindian fishtail points. As part of ongoing research on the earliest human occupations in this region, luminescence dating is applied to develop a terminal Pleistocene-Holocene regional chronology. Eight ages were derived from six samples taken from sedimentary fluvial deposits from two sites near the city of Paso de los Toros. The resulting dates span 11.8 and 1.04 ka corresponding to the Late Pleistocene and the whole Holocene. Because the chronology of the sedimentary sequences spanning these ages is poorly known, the presented results become a significant contribution to the construction of a chronostratigraphy sequence in the area. The results also show how single-grain dating can distinguish different components of mixed assemblages.

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Section: Geological Contextmentioning

confidence: 99%

Section: Geological Contextmentioning

confidence: 99%

Section: Geological Contextmentioning

confidence: 99%

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Luminescence Dating of Late Pleistocene and Holocene Sediments in Uruguay

Nami

2018

Latin Am. antiq.

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“…In Uruguay, the fossiliferous beds of the Sopas Formation have yielded vertebrate faunas, together with freshwater molluscs, plant remains and other trace fossils (Ubilla et al, 2004(Ubilla et al, , 2009Ubilla and Martínez, 2016). The mammalian assemblage includes extinct taxa, such as the capybara Neochoerus aesopi, the glyptodont Neuryurus rudis, and two extinct species of deer (Antifer ultra and Morenelaphus brachyceros).…”

Section: Hereabouts 63 North and South Americamentioning

confidence: 99%

Fossils from Quaternary fluvial archives: Sources of biostratigraphical, biogeographical and palaeoclimatic evidence

White

Bridgland

Limondin-Lozouët

et al. 2017

Quaternary Science Reviews

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Fluvial sedimentary archives have the potential to preserve a wide variety of palaeontological evidence, ranging from robust bones and teeth found in coarse gravel aggradations to delicate insect remains and plant macrofossils from fine-grained deposits. Over the last decade, advances in Quaternary biostratigraphy based on vertebrate and invertebrate fossils (primarily mammals and molluscs) have been made in many parts of the world, resulting in improved relative chronologies for fluviatile sequences. Complementary fossil groups, such as insects, ostracods and plant macrofossils, are also increasingly used in multi-proxy palaeoclimatic and palaeoenvironmental reconstructions, allowing direct comparison of the climates and environments that prevailed at different times across widely separated regions. This paper reviews these topics on a regional basis, with an emphasis on the latest published information, and represents an update to the 2007 review compiled by the FLAG-inspired IGCP 449 biostratigraphy subgroup. Disparities in the level of detail available for different regions can largely be attributed to varying potential for preservation of fossil material, which is especially poor in areas of non-calcareous bedrock, but to some extent also reflect research priorities in different parts of the world. Recognition of the value of biostratigraphical and palaeoclimatic frameworks, which have been refined over many decades in the 'core regions' for such research (particularly for the late Middle and Late Pleistocene of NW Europe), has focussed attention on the need to accumulate similar palaeontological datasets in areas lacking such long research histories. Although the emerging datasets from these understudied regions currently allow only tentative conclusions to be drawn, they represent an important stage in the development of independent biostratigraphical and palaeoenvironmental schemes, which can then be compared and contrasted. *Manuscript Click here to view linked References Highlights Research over the last decade into biostratigraphical data recorded in fluvial archives is reviewed Consideration of biogeography and palaeoclimatic evidence is also included This emphasizes the disparities in research priorities and fossil preservation on a global scale *Highlights (for review)

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“…Characterizing the terminal Pleistocene, the former is called the Sopas-Dolores (Panario & Gutiérrez, 1999) or Dolores Formation (Martinez & Ubilla, 2004), and is an extensive brown to green sedimentary silt that can be identified throughout Uruguay (e.g. Martinez & Ubilla, 2004;Ubilla & Martínez, 2016;Feathers & Nami, 2018). As can be seen in Figure 5, in some localities overlying the Sopas-Dolores (or just directly on the bedrock) are varied recent sedimentological strata, some being composed of pale brown and gray sandy sediments and/or a remarkably black clay stratum, which are probably remnant peats from wetlands that covered much of Uruguay during the Holocene (Iriarte, 2006).…”

Section: Briefs On the Geological And Environmental Settingmentioning

confidence: 99%

A Glimpse into Advances in Archaeological Research in North-Central Uruguay

Nami¹

2020

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The Tacuarembó Department of north-central Uruguay, and especially in the middle portion of the Negro River, has produced a rich and diverse archaeological record, mostly characterized by significant evidence of stone tool remains. The evidence comprises one of the largest collections of artifacts witnessing early human occupation in the region during the terminal Pleistocene about 11,000-10,000 uncalibrated radiocarbon years ago. As part of a long-term research program aimed at exploring and understanding diverse aspects of the regional archaeological process, mainly focusing on the earliest people who colonized the New World, as well as to deepen and expand knowledge on diverse aspects of the Late Pleistocene and post-Pleistocene stone tool technologies employed by the prehistoric people living in this part of southeastern South America. Systematic research enabled numerous field and laboratory activities to be conducted. To build a chronostratigraphic framework for the regional archaeological process, various dating methods were used. Furthermore, diverse technological analyses on lithic artifacts facilitated recognition of the existence of unreported techniques and reduction strategies employed by the prehistoric inhabitants. By this way this paper summarizes the observations and results obtained during the most recent field and laboratory investigation carried out in Tacuarembó by offering a glimpse into the use of diverse scientific disciplines and approaches that may help to deepen various topics concerning the regional prehistoric past. The archaeological excavations as well as the variety of dating methods used have allowed us to understand the chronology and certain aspects of the site formation process revealing important depositional gaps and hiatuses of several thousand years in the dated sedimentary deposit. The new technological investigations have permitted more detailed knowledge to be collected regarding diverse topics related to the reduction systems existing in the area since the terminal Pleistocene.

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Geology and Paleontology of the Quaternary of Uruguay

Cited by 38 publications

References 22 publications

Luminescence Dating of Late Pleistocene and Holocene Sediments in Uruguay

Luminescence Dating of Late Pleistocene and Holocene Sediments in Uruguay

Fossils from Quaternary fluvial archives: Sources of biostratigraphical, biogeographical and palaeoclimatic evidence

A Glimpse into Advances in Archaeological Research in North-Central Uruguay

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