Quaternary International最新文献

{"title":"Was LIA synchronous with equa-tropical climate? A multiproxy study from the southwest coast of India","authors":"Pooja Tiwari ,&nbsp;Biswajeet Thakur ,&nbsp;Purnima Srivastava ,&nbsp;Sanjay Kumar Singh Gahlaud ,&nbsp;Trina Bose ,&nbsp;Anurag Kumar ,&nbsp;Ravi Bhushan ,&nbsp;Rajesh Agnihotri","doi":"10.1016/j.quaint.2024.09.004","DOIUrl":"10.1016/j.quaint.2024.09.004","url":null,"abstract":"<div><div>A comprehensive study of the Mundrothruthu (MT) core (70 cm) from the Asthamudi wetland in Kollam, Kerala, India reveals three climate phases during the Little Ice Age (LIA) through multi-proxy investigations. The period (1507–1518 CE) shows high agricultural activity indicated by abundant diatom diversity, significant terrestrial influx, and freshwater runoff. Elevated TOC% and δ¹³C_TOC values suggest high temperature and a warm, humid climate, likely driven by high terrestrial influx and transport of organic matter from the nearby surroundings. This may have increased the organic matter influx to the estuary leading to high TOC% and more negative δ¹³C values. The second phase (1519–1548 CE) is characterized by increased marine incursion due to enhanced tidal currents, evidenced by a rise in marine palynomorphs, mixed terrestrial and marine organic matter, less negative δ¹³C values, and increased mud content. This shift likely reflects changes in sea level or tidal dynamics. The final period (1548–1804 CE) is marked by further enhancement of marine taxa, lower TOC%, and δ¹³C_TOC values, indicating reduced atmospheric CO₂ and a temperature decrease of about 1 °C. This period is associated with reduced solar insolation and a southward shift of the Inter Tropical Convergence Zone (ITCZ). The study highlights both synchronous and asynchronous climatic behavior on the southwest coast of India relative to global changes during the LIA. Initially warm and humid with high agricultural productivity, the region gradually shifted to marine-dominated conditions due to tidal dynamics and broader climatic shifts. These findings underscore the complex interplay between local and global climatic factors during the LIA.</div></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"709 ","pages":"Pages 66-81"},"PeriodicalIF":1.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Trace element variations in Indian speleothems: Insights into the Holocene climate","authors":"Ipsita Roy,&nbsp;Naveen Gandhi","doi":"10.1016/j.quaint.2024.08.007","DOIUrl":"10.1016/j.quaint.2024.08.007","url":null,"abstract":"<div><div>Speleothems from the Gupteswar and Kadapa caves were investigated using trace element (TE) ratios (Mg, Ba, Sr, Rb, Mn, Ti, U) over the last 7000 years, supported by ²³⁰Th/²³⁴U dating, to understand the regional and local climate variability induced by the Indian Summer Monsoon. The behavior of TE in calcite is influenced by temperature, seepage pathways, bedrock chemistry, and vegetation cover above the cave. A continuous decrease in the Ba/Sr ratio since 7 ka BP indicates changes in regional precipitation or local moisture availability during this period. However, determining changes in drip water rate and chemical composition is challenging due to the lack of supporting data. Variations in the TE ratios suggest significant climate and depositional changes at ∼4.2 ka BP and ∼2.8 ka BP. A decline in precipitation was observed between 4.2 and 3.8 ka BP and at ∼2.8 ka BP, with an increase in aeolian deposition at the study site since 3.8 ka BP because of preceding dry conditions. The moist and dry climate phases deduced from stable isotope values corroborate the variations in trace element ratios, affirming the paleoclimatic significance of the studied trace elements in tropical cave deposits. A probable explanation for the decline in precipitation at the study location around 4.2 ka BP is the southward migration of the Intertropical Convergence Zone (ITCZ) along with a negative phase of the Indian Ocean Dipole. The prevailing dry conditions in this region could have impacted the northward monsoonal winds, contributing to the decline of the Indus Valley Civilization. Another abrupt change observed at ∼2.8 ka BP can be linked to low solar activity and the southward movement of the ITCZ, coupled with enhanced El Niño-Southern Oscillation activity.</div></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"709 ","pages":"Pages 55-65"},"PeriodicalIF":1.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593334","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Upper Pleistocene in Mallorca: Sedimentary variability of littoral units in relation to different structural contexts","authors":"Federica Perazzotti ,&nbsp;Laura Del Valle ,&nbsp;Joan J. Fornós","doi":"10.1016/j.quaint.2024.08.005","DOIUrl":"10.1016/j.quaint.2024.08.005","url":null,"abstract":"<div><div>This comprehensive study explores the Upper Pleistocene geological history of Mallorca, employing a multidisciplinary approach that integrates previous findings with new insights. The research spans various coastal regions, focusing on four distinct study areas characterized by different geomorphological and structural contexts. The first structural context, exemplified by Port des Canonge, showcases a fold and thrust sedimentary succession, resulting in prominent cliffs with Jurassic and Triassic formations. The second context, observed in Caloscamps, features smoother reliefs and notable terrestrial sediment input. Meanwhile, the third context, represented by Punta de s’Avançada and Punta de n’Amer, exhibits cliffs carved on Upper Miocene tabular units devoid of terrestrial sediment input. The main objective is to provide a comprehensive understanding of the geological and sedimentological characteristics of the Upper Pleistocene units across the Mallorca coastal regions by investigating different study areas located along the west, north-west, north-east, and east coasts, in distinct geomorphological and geological contexts using sedimentological methodologies: stratigraphic analysis, X-ray diffraction analysis, microscopic techniques, and assessment of sediment color. Additionally, Optically Stimulated Luminescence (OSL) dating techniques are employed, providing a precise temporal framework spanning Marine Isotope Stage 6 (MIS 6) to Marine Isotope Stage 3 (MIS 3). The findings reveal the complex interplay of environmental factors, climatic variations, and geological evolution across Mallorca. Colluvial deposits and paleosols reflect climatic shifts. Alluvial fans and aeolianites highlight periods of intense sediment transport and deposition linked to climate fluctuations. Finally, to provide a comprehensive overview of the outcrops present on the island, a stratigraphic correlation of the mentioned areas was conducted. In conclusion, the study enhances our comprehension of the regional coastal dynamics, geological composition, and environmental history, providing invaluable contributions to the broader understanding of Pleistocene deposits.</div></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"709 ","pages":"Pages 1-14"},"PeriodicalIF":1.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142202471","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Paleoenvironmental characterisation of the Campos Basin slope (SE Brazil) in front of Cape São Tomé based on benthic foraminiferal biofacies succession since MIS 5","authors":"Sarah Pereira Gasparini ,&nbsp;Claudia Gutterres Vilela ,&nbsp;Mark Maslin","doi":"10.1016/j.quaint.2024.08.004","DOIUrl":"10.1016/j.quaint.2024.08.004","url":null,"abstract":"<div><div>The distribution of benthic foraminifera and the assemblage dynamics were analysed on piston core GL-54 to understand the changes in paleoecology since Marine Isotopic Stage 5 (MIS 5). The core was drilled on the upper slope of the Campos Basin on the Rio de Janeiro (Brazil) coast. Benthic foraminifera biofacies, ecological indices, lithological facies, biostratigraphy, and isotopic analyses were undertaken to characterise the paleoenvironment in front of Cape of São Tomé. Two distinct biofacies were identified in the GL-54 sedimentary record since the Last Interglacial Period (MIS 5). These two biofacies point to seasonal organic matter and a well-oxygenated environment, however, Biofacies 2 can be differentiated from Biofacies 1 by the presence of significant bottom water currents. Biofacies 2 has the same species as Biofacies 1, except for <em>Miliolinella subrotunda</em>. Benthic foraminiferal species and biofacies from GL-54 were compared to the ones present in the upper portion of the GL-39 piston core, which was drilled from the middle slope of the same basin. Species such as <em>Globocassidulina crassa</em>, <em>Islandiella norcrossi</em>, <em>Alabaminella weddellensis</em>, <em>Bolivina paula</em>, <em>M. subrotunda</em>, <em>Bulimina aculeata</em>, <em>Globocassidulina subglobosa</em>, <em>Rotorbinella lepida</em>, and <em>Uvigerina peregrina</em> were found in both piston cores. The biofacies of both piston cores were correlated, pointing to similarities between the upper slope and the middle slope in the Campos Basin since MIS 5. In general, the upper and middle slopes of the Campos Basin are characterised as a well-oxygenated environment with variation in the deposition of organic matter. In addition to these environmental factors, there is evidence for a strong bottom current in MIS 2 at both sites, probably due to the displacement of Brazil Current and Intermediate Western Boundary Current.</div></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"709 ","pages":"Pages 29-42"},"PeriodicalIF":1.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Holocene paleoclimatic records from Chakrata area, Northwest Himalaya","authors":"Narendra Kumar Meena ,&nbsp;Firoz Khan ,&nbsp;Yaspal Sundriyal ,&nbsp;Robert James Wasson ,&nbsp;Pankaj Kumar ,&nbsp;Rajveer Sharma","doi":"10.1016/j.quaint.2024.08.008","DOIUrl":"10.1016/j.quaint.2024.08.008","url":null,"abstract":"<div><div>We present monsoon variability records for the Holocene using multi-proxy approach (environmental magnetism, carbon isotope, and total organic carbon) from a 146 cm thick sedimentary profile in the Kotikanasar meadow (Chakrata), Northwest Himalaya. The chronology of the record was constrained by five AMS ¹⁴C ages. The carbon isotope (δ¹³C) and Total Organic Carbon (TOC) data highly variable which vary between −26.62‰ and −22.46‰ (C₃-plants) and 0.1–∼4%, respectively, indicating paleo-vegetation history and productivity of the studied area. The environmental magnetism is highly fluctuating in the Early Holocene with high concentrations of magnetic minerals during the high monsoon conditions and <em>vice-versa</em>. Intense Indian Summer Monsoon (ISM) phases were identified during the Early and Late Holocene i.e., ∼9.2 to 7.4 ka, and ∼4.8 ka to Modern which shows warm and wet climate. While decline in the ISM intensity during ∼7.4 to 4.8 ka which indicates cold and dry climatic condition in the Northwest Himalayan regions. From ∼9.2 to 7.4 ka, highly fluctuating climate linked with the Early Holocene warming. Sediment profile exhibits aridity in climate accompanying with the high influence of mid-latitude westerlies during ∼7.4 to 4.8 ka from Northwest Indian regions. Hence the long-term fluctuation in the climate governed by the changes in the North Atlantic Ocean circulation as well as variations in the incoming solar radiations.</div></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"709 ","pages":"Pages 43-54"},"PeriodicalIF":1.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593333","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Early Pleistocene forerunners of Mammuthus-Coelodonta Faunal Complex in Nihewan Basin, North China","authors":"Haowen Tong ,&nbsp;Xi Chen ,&nbsp;Bei Zhang","doi":"10.1016/j.quaint.2024.08.006","DOIUrl":"10.1016/j.quaint.2024.08.006","url":null,"abstract":"<div><div>The typical <em>Mammuthus</em>-<em>Coelodonta</em> Faunal Complex dominated the mid- and high latitudes of continental Eurasia during the Mid-Late Pleistocene; the dominant taxa include woolly mammoth (<em>Mammuthus primigenius</em>), woolly rhino (<em>Coelodonta antiquitatis</em>), steppe bison (<em>Bison priscus</em>) and diverse horses (<em>Equus</em> spp.), etc. Recent excavations at the Early Pleistocene site Shanshenmiaozui in Nihewan Basin of North China resulted in the discoveries of rich mammalian fossils which include steppe mammoth (<em>Mammuthus trogontherii</em>), Nihowan woolly rhino (<em>Coelodonta nihowanensis</em>), archaic Chinese bison (<em>Bison</em> (<em>Eobison</em>) <em>palaeosinensis</em>) and rich collections of early horse fossil. In Nihewan Basin, a couple of sites (Xiashagou, Shanshenmiaozui and Yeniupo) yielded the <em>Mammuthus</em>-<em>Coelodonta</em>-<em>Bison</em> assemblage, which can be regarded as the closest ancestors of the <em>Mammuthus</em> - <em>Coelodonta</em> Faunal Complex or the forerunners of the later <em>Mammuthus</em> - <em>Coelodonta</em> Faunal Complex. Nihewan Basin bears the richest and most complete fossils of Early Pleistocene <em>Coelodonta</em> and <em>Bison</em> to date, and the juvenile specimens of <em>M. trogontherii</em> also represent the richest collection for its kind and its geologic age.</div></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"709 ","pages":"Pages 15-28"},"PeriodicalIF":1.9,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593331","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Charred and shrunken pollen grains as a result of special depositional conditions in the Roman age Vesuvian area","authors":"Marta Mariotti Lippi","doi":"10.1016/j.quaint.2024.10.004","DOIUrl":"10.1016/j.quaint.2024.10.004","url":null,"abstract":"<div><div>Despite the sudden burial to which they were subjected during the eruption of 79 AD, many of the soil samples from the Vesuvian area are poor or devoid of pollen. This research assesses whether a carbonization process may be responsible for the complete or partial loss of pollen grains or, at very least, for them going unrecorded during pollen analyses. The discovery of a certain number of pollen grains in plant material from Oplontis has made it possible to investigate which heating conditions they may have been subjected to. For this purpose, in this study, modern pollen grains were exposed to different temperatures for different time intervals in order to observe their modification. The data collected indicate that exposure to high temperatures, even for a short time, can significantly impact pollen grains to the point of making them undetectable during palynological analyses. Modern pollen grains similar to those of Oplontis are observed after exposure to 300 °C for 15 min. The state of preservation of the Oplontis reticulate grains makes prolonged exposure to 300 °C or higher temperatures unlikely. The temperature indications obtained are compatible with data from other studies. The hypothesis of combustion may also explain the small dimensions of many grains found in the Vesuvian sites.</div></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"711 ","pages":"Pages 59-67"},"PeriodicalIF":1.9,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592723","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Molecular to macrofossils indicating last millennium sea level in Lavsa saltpans, Croatia","authors":"Benny Bechor ,&nbsp;Martina Conti ,&nbsp;Brendan Keely ,&nbsp;Simona Avnaim-Katav ,&nbsp;Steffen Mischke ,&nbsp;Slobodan Miko ,&nbsp;Ozren Hasan ,&nbsp;Maja Grisonic ,&nbsp;Irena Radić Rossi ,&nbsp;Naomi Porat ,&nbsp;Yael Edelman-Furstenberg ,&nbsp;Dorit Sivan","doi":"10.1016/j.quaint.2024.10.002","DOIUrl":"10.1016/j.quaint.2024.10.002","url":null,"abstract":"<div><div>Intertidal salt production sites existed continuously around the Mediterranean since classical antiquity, and their remains are present in large numbers along the Dalmatian (east Adriatic) coast. Most of them are preserved and dated to medieval times. This study aims to develop complementary proxies identifying the salt production layer in submerged ancient saltpans of Lavsa, a remote island on the central Dalmatian coast, to date the saltwork units by optically stimulated luminescence (OSL) and use them to infer changes in sea level. The significance of the study is in the application of molecular fossil analyses identifying the hypersaline layer in the sediments from a core drilled in the saltpan's site. The molecular fossil analyses correlate with the results of micro and macrofossil analyses and geochemical findings, all representing the saltwork unit. The depth of the hypersaline layers and the OSL dates provide relative sea level (RSL) lower limiting points of −145 ± 5 cm at 1309 ± 33 CE, probably the time when salt production started in Lavsa, and −115 ± 5 cm at 1364 ± 52 CE when saltwork activities ended. These limiting points extend the known RSL index point in Lavsa Island of −92 ± 8 cm, with an updated average age of 1337 ± 62 CE, correlating with the historical records. Medieval lower sea levels were also observed in the northern and southern parts of the east Adriatic coast as well as in other parts of the Mediterranean, probably driven by climate-related events, generating centennial-scale fluctuations in past sea levels that cannot be predicted by glacial isostatic adjustment (GIA) models.</div></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"710 ","pages":"Pages 95-110"},"PeriodicalIF":1.9,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142593259","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Nixtamalization at La Corona: Microbotanical analysis of ceramic vessels indicates Late Classic Maya cooking techniques","authors":"Clarissa Cagnato ,&nbsp;Jocelyne M. Ponce ,&nbsp;Marcello A. Canuto ,&nbsp;Tomás Barrientos Q.","doi":"10.1016/j.quaint.2024.09.007","DOIUrl":"10.1016/j.quaint.2024.09.007","url":null,"abstract":"<div><div>Maize (<em>Zea mays</em>) was a fundamental part of the diet for the Classic period Maya (ca. 250–900 CE) and other Mesoamerican societies. Nixtamalization, the process whereby maize is cooked in an alkaline solution, is important as it enhances the nutritional value of maize, among other reasons. However, documenting this process in the archaeological record is not straightforward. A microbotanical study of residues collected from ceramic vessels and grinding stones from Late Classic (ca. 600–900 CE) contexts at the Lowland Maya site of La Corona (Peten, Guatemala), revealed the presence of starch spherulites. Their authenticity was confirmed by polarized microscopy and Scanning Electron Microscope (SEM) imaging combined with iodine staining. We argue that nixtamalization as a cooking technique was occurring at La Corona during the 7th and 8th centuries CE. We present evidence from ceremonial contexts, specifically burial and feasting/commensal events. This is the earliest evidence of lime-treated maize in the Maya area recovered directly from ceramic vessels linked to preparation and/or consumption of food.</div></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"711 ","pages":"Pages 38-48"},"PeriodicalIF":1.9,"publicationDate":"2024-10-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A new method for loess chronology by microcodium δ18O and its application to the Mangshan section","authors":"Zeke Zhang ,&nbsp;Gaojun Li ,&nbsp;Tao Li ,&nbsp;Jiaju Zhao ,&nbsp;Peixian Shu ,&nbsp;Yitong Chen","doi":"10.1016/j.quaint.2024.09.006","DOIUrl":"10.1016/j.quaint.2024.09.006","url":null,"abstract":"<div><div>Mangshan section is a scarce and valuable high-sedimentation deposit at the southeastern margin of the Chinese Loess Plateau for high-resolution paleoclimate reconstructions. Although the chronology of the deposit above the paleosol layer S2 has been pinned down on the glacial-interglacial timescale, it still needs to be refined at orbital timescale, especially at the boundary from loess layer L2 to paleosol layer S1. In the age model by correlation of loess grain size with the benthic oxygen isotope (δ¹⁸O) records, the lack of paleosol and low magnetic susceptibility during the marine isotope stage 5e are substantially different from the observations in other loess-paleosol sequences on the Chinese Loess Plateau. Here, we analyzed the oxygen isotope composition of microcodium from the upper loess layer L2 and paleosol layer S1 of the Mangshan section to reconstruct the oxygen isotopic stratigraphy. Comparing it with the absolute-dating speleothem δ¹⁸O record, we suggest corresponding the paleosol layer S1 to the last interglacial, which is consistent with other loess-paleosol sequences on the Chinese Loess Plateau. Our study provides a new method for the loess chronology by tuning the microcodium δ¹⁸O record to the absolute-dating speleothem δ¹⁸O record.</div></div>","PeriodicalId":49644,"journal":{"name":"Quaternary International","volume":"711 ","pages":"Pages 32-37"},"PeriodicalIF":1.9,"publicationDate":"2024-10-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142592721","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}