Journal of South American Earth Sciences最新文献

{"title":"Characterizing the Namorado Sandstone in southern Brazil through the analysis of a multi-borehole database and utilizing a contemporary workflow","authors":"Abel Carrasquilla ,&nbsp;Apoena Rossi","doi":"10.1016/j.jsames.2024.105219","DOIUrl":"10.1016/j.jsames.2024.105219","url":null,"abstract":"<div><div>The petrophysical characterization of reservoirs requires the identification of sedimentary facies based on the integration of geophysical well logs and rock analyses in the laboratory, which is one of the significant challenges for the petroleum industry. In this work, laboratory analysis results were linked to quality controls of data pre-processing in a new workflow by integrating several techniques. The wells studied were zoned and laterally correlated based on electrofacies characteristic core analysis and petrographic descriptions. This integration resulted in a modeled geologic section for the Namorado Sandstone in the Campos Basin of southeastern Brazil, created based on various data from each well. The borehole NA2 was selected as the key wellbore after creating this section. The logs from this borehole were then analyzed to separate the permo-porous (reservoirs) and non-porous (non-reservoirs) horizons. The zones containing water and hydrocarbons in the permo-porous sections of interest were split along the wells. Subsequently, the identified sectors were interpreted using petrophysical techniques to confirm the preliminary categorization. After combining all quantitative products to quantify the porous layers capable of producing mobile oil, the cut-off factors were introduced. The next step was determining the parameters of the Archie equation, the amount of clay present, and the water saturation from core descriptions, which led to the discovery of deep laminated sandstones. The results strongly correlate with lithology, geological facies, borehole logs, and petrophysical laboratory data. Based on these findings, it is evident that the clay concentration is the primary factor influencing the oil saturation in this reservoir.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"150 ","pages":"Article 105219"},"PeriodicalIF":1.7,"publicationDate":"2024-11-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142658258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Estimation and assessment of water erosion in the Peixe Angical basin, Brazil","authors":"Dione P. Cardoso ,&nbsp;Wharley P. dos Santos ,&nbsp;Sérgio H.G. Silva ,&nbsp;Marina N. Merlo ,&nbsp;Salvador F. Acuña-Guzman ,&nbsp;Fausto W. Acerbi Júnior ,&nbsp;Marcelo R. Viola ,&nbsp;Marx L.N. Silva ,&nbsp;Nilton Curi ,&nbsp;Junior C. Avanzi","doi":"10.1016/j.jsames.2024.105235","DOIUrl":"10.1016/j.jsames.2024.105235","url":null,"abstract":"<div><div>Water erosion causes the displacement of soil particles from higher to lower elevations, and this process intensifies when land use and vegetation cover change, such as through the conversion of forests into pastures or agricultural fields. Identifying priority areas for soil and water conservation practices is essential for promoting sustainable agriculture. Equally important is identifying the most influential factors driving erosion, as understanding these can guide effective land management strategies. Machine learning techniques, such as Random Forest, are valuable tools for analyzing large datasets and assessing the importance of variables. The primary aim of this study was to estimate soil losses due to land-use changes in the Peixe Angical Reservoir drainage basin using the Revised Universal Soil Loss Equation (RUSLE) within a Geographic Information System (GIS) framework, and to identify priority areas for soil conservation. Additionally, the study aimed to evaluate the contribution and importance of the RUSLE model factors (R, K, LS, and C) to soil loss using the Random Forest regression algorithm. Soil losses were computed for the chronological scenarios (1990, 2000, 2010, and 2017), using rasters with 90 m resolution to calculate the product of the R, K, LS, and C factors, along with the P factor. These soil losses were classified into erosion risk categories, ranging from very low (0–2.5 Mg ha⁻¹ yr⁻¹) to extremely high (greater than 100 Mg ha⁻¹ yr⁻¹). Soil losses in the basin increased over time. The Random Forest algorithm was applied to evaluate the importance of each factor. Rainfall erosivity was found to vary spatially, ranging from 7047.64 MJ mm ha⁻¹ h⁻¹ yr⁻¹ to 11,348.5 MJ mm ha⁻¹ h⁻¹ yr⁻¹, while the LS factor exhibited values ranging from near 0 to over 20. Litholic Neosol (Entisol) was the predominant soil type in the drainage basin. In terms of land use, forests accounted for the largest portion of the basin: 55.60% in 1990, 51.31% in 2000, 48.88% in 2010, and 48.21% in 2017. The C factor, which reflects vegetation cover, was the most significant contributor to soil loss, accounting for 44.8% in 1990, 43.5% in 2000, 44.2% in 2010, and 44.4% in 2017, followed by the K factor (soil erodibility). These assessment techniques can be utilized in guiding conservation planning, thereby supporting sustainable land use practices.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"149 ","pages":"Article 105235"},"PeriodicalIF":1.7,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142578985","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deciphering the complex history of the cabo frio high – SE brazilian continental margin","authors":"D.R. Brandão,&nbsp;A.E. Ferraz,&nbsp;R.J. Jahnert,&nbsp;M. Brito,&nbsp;K. Motoki,&nbsp;F. Braga,&nbsp;S.L.M. Mello,&nbsp;C.G. Silva,&nbsp;L.A.P. Gamboa","doi":"10.1016/j.jsames.2024.105214","DOIUrl":"10.1016/j.jsames.2024.105214","url":null,"abstract":"<div><div>Extensive seismic reflection interpretation of the Cabo Frio High allowed better understanding of its proximal and distal structure. Seismic lines helped map the salt base and recognize the primary geological interfaces, unconformities, faults, and volcanic intrusions. The proximal Cabo Frio High is a continental basement uplift extending mainly into the Campos Basin. The Cabo Frio Outer High, which is of volcanic origin, lies between Santos and Campos Basins. This volcanism is concentrated at the crossing of two significant structures: Cruzeiro do Sul Lineament and Rio de Janeiro Fracture Zone. The Cabo Frio High fits an NW-SE fold axis, which is well correlated with distension along NW-SE direction generating a regional E-W sinistral plate movement, mainly related to the ENE-WNW sinistral Rio de Janeiro transfer zones. The accumulated uplift is approximately 4 km, achieved by at least four uplifting pulses. The uplifting starts in the Albian-Santonian, characterized by the elevation of the northeast portion of Cabo Frio High, followed by erosion. The sill and dikes intruded in the Upper Cretaceous, and the uplift of the southwest portion of the Cabo Frio High characterizes the second uplift pulse. Subaerial Eocene volcanos characterize the third uplifting pulse. The uplifting of the Blue Marker horizon (Oligocene) characterizes the last pulse.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"150 ","pages":"Article 105214"},"PeriodicalIF":1.7,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593486","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New Cingulata (Mammalia, Xenarthra) from the late Neogene Palo Pintado Formation (Northwestern Argentina)","authors":"Alfredo E. Zurita ,&nbsp;Claudia I. Galli ,&nbsp;Daniel Barasoain ,&nbsp;Sofía I. Quiñones ,&nbsp;Carlos A. Luna ,&nbsp;Adriana M. Candela ,&nbsp;Enzo M. Landa Ramírez ,&nbsp;Ricardo N. Alonso","doi":"10.1016/j.jsames.2024.105233","DOIUrl":"10.1016/j.jsames.2024.105233","url":null,"abstract":"<div><div>Cingulata (Early Eocene-Recent) is a very well-diversified clade that reached a high diversity during the early Neogene. In southern South America, there is an evident imbalance in our knowledge of the Neogene diversity along the Northwestern region of Argentina (NWA) compared to the Pampean region (PR), despite the importance of NWA to understanding the hypothetical evolutionary scenarios of several clades. The Palo Pintado Formation (<em>ca</em>. 10–5 Ma) is one of the richest units in NWA, involving both the global warming of the Tortonian (<em>ca</em>. 11.6–7.25 Ma) and the global cooling event of the Messinian (<em>ca</em>. 7.25–5.33), coeval with the widespread of the C4 plants. Despite this, Cingulata from this Formation are still poorly known. Interdisciplinary fieldwork at Calchaqui Valley (Angastaco Basin) yielded several new remains, including Chlamyphoridae Euphractinae <em>Proeuphractus limpidus</em>, <em>Chorobates villossisimus</em> and <em>Prozaedyus</em> sp.; Dasypodidae <em>Dasypus</em> sp.; Pampatheriidae <em>Kraglievichia paranensis</em>; and Glyptodontidae <em>Cranithlastus xibiensis</em>. The “armadillos” <em>P. limpidus</em>, <em>Prozaedyus</em> sp., and <em>Dasypus</em> sp. increase the previously known diversity. The record of <em>Dasypus</em> sp. reinforces recent hypotheses extending the biochron of the genus to the Late Miocene in NWA. The recognized taxonomic diversity of glyptodonts, limited to one species, contrasts with that known from other coeval formations placed both in the south (Andalhuala and Corral Quemado formations, Catamarca Province) and the north (Maimará and Tafna formations, Jujuy Province), revealing a complex biogeographic scenario for this clade during this period. The analyzed deposits are interpreted as accumulated within the channel and formed during episodes of large discharges of water and sediment mostly under a warm subtropical climate, tough there is an aridization recorded at <em>ca</em>. 6 Ma, which is probably related to the increase in the taxonomic diversification of Cingulata along the stratigraphic sequence.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"150 ","pages":"Article 105233"},"PeriodicalIF":1.7,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142657992","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Corrigendum to “Enhancing forensic applications through the mineralogy of clays in surface soil horizon: A case study of Baixada Fluminense, Southeast Brazil” [J. S. Am. Earth Sci., Volume 149, 1 December 2024, 105198]","authors":"Jéssica de Souza Gabi Barcellos ,&nbsp;Victor Salgado-Campos ,&nbsp;Paloma de Queiroz Cardoso ,&nbsp;Janaína de Assis Matos ,&nbsp;Carla Semiramis Silveira","doi":"10.1016/j.jsames.2024.105210","DOIUrl":"10.1016/j.jsames.2024.105210","url":null,"abstract":"","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"150 ","pages":"Article 105210"},"PeriodicalIF":1.7,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748483","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Craniodental reinterpretations and new specimens of Protuberum cabralense, a bizarre traversodontid cynodont from the earliest Late Triassic of Brazil","authors":"Maurício Rodrigo Schmitt ,&nbsp;Agustín Guillermo Martinelli ,&nbsp;Pedro Henrique Morais Fonseca ,&nbsp;Cesar Leandro Schultz ,&nbsp;Marina Bento Soares","doi":"10.1016/j.jsames.2024.105213","DOIUrl":"10.1016/j.jsames.2024.105213","url":null,"abstract":"<div><div>Traversodontid cynodonts form one of the most abundant tetrapod clades in continental Triassic beds of southern Brazil, with more than eleven species described. Within this clade, <em>Protuberum cabralense</em> is one of its most bizarre members, characterized by a robustly built skull and the presence of rounded protuberances in the dorsal surface of the ribs, ilium and neural spines in presacral vertebrae. The holotype and paratypes were collected in the 1970's but described only in 2009, being positioned in the clade Gomphodontosuchinae. Here we reanalyzed the skull of the holotype specimen and reinterpreted some anatomical traits, such as the number of upper incisors, position of the paracanine fossa, number of postcanines, morphology of the pterygo-paraoccipital foramen, among others. Through CT scan images the endocranial cavities are described and compared with <em>Santagnathus mariensis</em> (whose endocranial cavities are firstly described here) and other traversodontids. Also, two new occurrences of the species are presented, increasing its geographical distribution within the <em>Dinodontosaurus</em> Assemblage Zone (Pinheiros-Chiniquá Sequence, latest Ladinian-earliest Carnian) and its relevance to biostratigraphy. The reinterpretation of several traits resulted in a novel phylogenetic placement for <em>Protuberum cabralense</em>, nested outside the Gomphodontosuchinae clade, even as an earlier divergent than massetognathine forms.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"149 ","pages":"Article 105213"},"PeriodicalIF":1.7,"publicationDate":"2024-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Body mass of a large-sized Homotheriini (Felidae, Machairodontinae) from the Late Pliocene-Middle Pleistocene in Southern Uruguay: Paleoecological implications","authors":"Aldo Manzuetti ,&nbsp;Washington Jones ,&nbsp;Andrés Rinderknecht ,&nbsp;Martín Ubilla ,&nbsp;Daniel Perea","doi":"10.1016/j.jsames.2024.105231","DOIUrl":"10.1016/j.jsames.2024.105231","url":null,"abstract":"<div><div>Sabertooth cats (Felidae, Machairodontinae) are of particular interest for science, and general audience. Because this morphotype is not present in current faunas, several aspects of their biology are still little known in some taxa. The main goal of this contribution is to estimate the body mass (by using regression equations formulated for extant carnivorous mammals), and also the potential prey mass, of the material assigned to the saber-tooth cat cf. <em>Xenosmilus</em> sp. (MNHN Coll. F. OLIVERAS 31561) of the Late Pliocene-Middle Pleistocene from southern Uruguay. The body mass estimations calculated for this felid are within the range of 347–410 kg (average value 378 kg); while the estimated body size of its typical prey was around 1100 kg, the maximum estimated prey size varies from approximately 1800 to 2500 kg. According to these results, several aspects related to the paleoecology of this felid, referred to predator-prey interactions and its potential impact in the community of large carnivores from the beginning of the Quaternary in a regional context in southern South America, are discussed.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"149 ","pages":"Article 105231"},"PeriodicalIF":1.7,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552643","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New remains of Doedicurini (Cingulata, Glyptodontidae) from the latest Pliocene/earliest Pleistocene of the Pampean Region (Argentina) shed light on the morphological evolution of the caudal tube","authors":"A. Núñez-Blasco ,&nbsp;M. De los Reyes ,&nbsp;F. Cuadrelli ,&nbsp;S. Quiñones ,&nbsp;A.E. Zurita","doi":"10.1016/j.jsames.2024.105232","DOIUrl":"10.1016/j.jsames.2024.105232","url":null,"abstract":"<div><div>Glyptodonts are probably among the most iconic and enigmatic mammals that ever lived during the Cenozoic of America. One of the main clades, Hoplophorinae, developed since the Miocene a structure unique within mammals, the caudal tube, composed of the union of the distal most caudal rings of the caudal armor. In some taxa, especially in the Late Pleistocene species, the caudal tube suffered significant morphological changes. One extreme case is represented by the giant-sized Doedicurini <em>Doedicurus clavicaudatus,</em> in which the caudal tube is transformed into a kind of “clave” (ie., a widening of the distal part, and some large lateral figures where corneal “spine-like” structure were inserted). It has been suggested that this was used in intraspecific combat rather than having a defensive function. Despite this, almost nothing is known about the morphological evolution of this structure along the evolutionary history of Doedicurini. The finding of new remains of <em>Eleutherocercus</em> sp. (a partial caudal tube and dorsal carapace) from the El Polvorín Formation at the Plio/Pleistocene boundary in the surrounding of Olavarría (Buenos Aires province, Argentina), allow us a better understanding of the morphological evolution of this structure between the Late Miocene/Pliocene <em>Eleutherocercus</em> spp. (ca. 7–2.6 Ma) and the Late Pleistocene <em>Doedicurus clavicaudatus</em>. The extreme modification in <em>D. clavicaudatus</em> involves, among others, the disappearance of the most proximal lateral figures, an increase in the diameter of the I Lat figures and disappearance of the II and III Lat figures; and increase in size and lateralisation of the dorso-ventral pairs (especially the 1st pair).</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"149 ","pages":"Article 105232"},"PeriodicalIF":1.7,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142561188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Exploring trace fossils on megafauna remains from the Quaternary Lagoa da Pedra tank deposit, northeastern Brazil","authors":"Luana C. Andrade ,&nbsp;Fernando H. de S. Barbosa ,&nbsp;Hermínio I. Araújo-Júnior ,&nbsp;Rudah R.C. Duque ,&nbsp;Eduarda Peters ,&nbsp;Hugo Bampi ,&nbsp;Johnson S.O. Nascimento ,&nbsp;Édison V. Oliveira","doi":"10.1016/j.jsames.2024.105230","DOIUrl":"10.1016/j.jsames.2024.105230","url":null,"abstract":"<div><div>The natural tank deposits of northeastern Brazil, particularly those with sedimentary filling, are notable for preserving extensive Quaternary megafauna fossil remains. While previous studies have primarily emphasized taxonomic aspects, ichnological evidence has also been documented. This study reports new trace fossils on megafauna remains from the Lagoa da Pedra natural tank (state of Pernambuco, Brazil), shedding light on behavioral interactions between megafauna taxa and other organisms. Four distinct traces, corresponding to three ichnogenera (<em>Cubiculum</em>, <em>Nihilichnus</em>, and <em>Machichnus</em>), were identified on post-cranial bones, three from <em>Eremotherium laurillardi</em> and one from <em>Xenorhinotherium bahiense</em>. Holes and pits (<em>Nihilichnus nihilicus</em>) on the radius of <em>X. bahiense</em> and the rib of <em>E. laurillardi</em>, along with furrows and scratches (<em>Machichnus fatimae and M. bohemicus</em>) on the rib of <em>E. laurillardi</em>, are attributed to scavenging activities, likely by carnivores. Additionally, furrows observed on the rib and vertebra of <em>E. laurillardi</em> are associated with dermestid insect pupation (<em>Cubiculum ornatus</em> and <em>C. cooperi</em>). These pupal chambers of dermestid insects (<em>Cubiculum</em>) suggest that the final stage of the dry carcasses, before the final burial, probably happened under the dry phase during the Late Pleistocene-Early Holocene.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"149 ","pages":"Article 105230"},"PeriodicalIF":1.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142573469","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Glacial and periglacial geomorphology of the eastern flank of the north Patagonian Andes: Quaternary morphoclimatic evolution","authors":"Reato Agustina ,&nbsp;Oscar A. Martínez ,&nbsp;Alexander Cottescu ,&nbsp;David Serrat","doi":"10.1016/j.jsames.2024.105211","DOIUrl":"10.1016/j.jsames.2024.105211","url":null,"abstract":"<div><div>The cold climate events of the Upper Cenozoic greatly modified the landscape of Patagonia, where a large number of relicts and active landforms of glacial, periglacial and paraglacial origin is preserved. To assess the regional paleoclimatic record when numerical ages are unavailable, the spatial distribution of local depositional landform sequences was analyzed in six mountain ranges located on the eastern margin of the North Patagonian Andes. The analysis of satellite images and digital elevation model, fieldwork research and its integration into a Geographical Information System were used to develop a detailed inventory of mountain landforms. A total of 67 glacial valleys, 97 glacial cirques, 94 moraines, 75 rock glaciers, 103 protalus ramparts, and more than 145 km² and 100 km² of surface affected by solifluction and mass wasting processes respectively were mapped. From the analysis of the spatial and altitudinal distribution of landforms, we defined temporal and spatial sequences of morpho-climate importance. We recognized four major morpho-climate events associated with local paleoclimate conditions and one stage of a recent paraglacial adjustment. The oldest cold climate event recognized might be correlated with the Last Glacial Maximum. The results show the rise in the average air temperature and an aridity trend for the study area since the Late Pleistocene. During this lapse, glacial environments evolved to periglacial environments, although was recognized their coexistence in some areas in the same mountain range.</div></div>","PeriodicalId":50047,"journal":{"name":"Journal of South American Earth Sciences","volume":"149 ","pages":"Article 105211"},"PeriodicalIF":1.7,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142552642","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}