Quaternary Science Advances最新文献

{"title":"Living by the land, gazing at the sea: Hominin occupation of near-coastal landscapes on the western periphery of the Red Sea","authors":"Amanuel Beyin","doi":"10.1016/j.qsa.2024.100247","DOIUrl":"10.1016/j.qsa.2024.100247","url":null,"abstract":"<div><div>The paper examines recently reported Acheulean and Middle Stone Age archaeological occurrences in near-coastal plains on the western periphery of the Red Sea (Sudanese coast) with the aim of illuminating the role of the region in hominin survival, and possibly as an out-of-Africa dispersal conduit. Using a Viewshed analysis in ArcGIS, the study sought to assess the extent to which the seashore may have been visible from the archaeology-bearing localities during conditions similar to the present or those more humid interglacial phases than today. The purpose of the Viewshed analysis is to gauge the range of habitat-options hominins had on the western periphery of the Red Sea. The result demonstrates that the seashore would have been visible from most of the archaeological sites. Thus, it is reasonable to surmise that the coastal margin may have remained an integral part of the space exploited by the hominins that inhabited the nearby inland plains. However, the observation cannot be regarded as attesting all the areas deemed visible were necessarily exploited by hominins. Overall, the archaeological evidence from the study area broadens our understanding of the range of environments hominins occupied in Africa prior to and during their expansion to Eurasia. A proximate goal of the paper is to drive archaeological research attention to near-coastal landscapes, as such places may provide a potent vantage point to assess hominin engagement with the seashore. I conclude with an appeal to the paleoanthropological community to expand field-centered research to the vast understudied regions of Africa so as to capture hominin experiences across diverse ecosystems of the continent. Only then will we be able to discern hominin biogeographic range at different periods and theorize about the ecological drivers of our species' success.</div></div>","PeriodicalId":34142,"journal":{"name":"Quaternary Science Advances","volume":"16 ","pages":"Article 100247"},"PeriodicalIF":2.9,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142425187","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New evidence of glacier advances during Lateglacial Interstadial deciphered from facies evolution in proglacial lacustrine basins of the Maurienne Valley, French Alps","authors":"Thibault Roattino ,&nbsp;Jean-François Buoncristiani ,&nbsp;Christian Crouzet ,&nbsp;Riccardo Vassallo","doi":"10.1016/j.qsa.2024.100242","DOIUrl":"10.1016/j.qsa.2024.100242","url":null,"abstract":"<div><div>Sedimentological analysis of glaciolacustrine deposit in the French Alps provides an opportunity to elucidate poorly understood glacier fluctuations during the Lateglacial Interstadial. This study focuses on two proglacial lacustrine basins in the Maurienne Valley, Le Verney and Lanslebourg, recording sediment deposition during the Lateglacial. Sedimentological and soft sediment deformation analyses were conducted on these glaciolacustrine sedimentary deposits to constrain the dynamic of the Arc glacier. At Le Verney, the sedimentary succession records the deposition of a proglacial subaquatic fan under supercritical conditions, transitioning to a Gilbert delta-type sedimentation, indicating glacier retreat. Fluid overpressure, shear deformations, and compressional stresses found within Gilbert delta-type sediment marks a subsequent glacier advance. In the Lanslebourg basin, sedimentary deposits display supercritical and subcritical conditions, separated by deposition under a hydraulic jump characteristic of ice contact delta. In this area, glacier advance is recorded by a more proximal condition toward the top of the sedimentary succession, along with a transition to a subglacial condition. These findings reveal glacier advances during the Bølling-Allerød Interstadial, providing the first evidence of glacier re-advances in the French northern Alps during this warming period. This result highlights the complex interactions between local climate, glacier dynamics, and topography.</div></div>","PeriodicalId":34142,"journal":{"name":"Quaternary Science Advances","volume":"16 ","pages":"Article 100242"},"PeriodicalIF":2.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666033424000807/pdfft?md5=febad1f5ab88cdd9ccd75bae0aa7e038&pid=1-s2.0-S2666033424000807-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314902","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Morphological characteristics and controlling factors of the piedmont fan systems in the Zanskar region, Northwest Himalaya, India","authors":"Mohammad Irfan,&nbsp;Bikram Singh Bali,&nbsp;Ahsan Afzal","doi":"10.1016/j.qsa.2024.100240","DOIUrl":"10.1016/j.qsa.2024.100240","url":null,"abstract":"<div><div>Piedmont fans are prominent geomorphic features formed at the transition between mountain slopes and valley floors. This study investigates the morphology of alluvial fans in the Zanskar Basin (ZB) to uncover the key variables influencing their development and morphodynamics. Utilizing advanced GIS and remote sensing techniques, along with field investigations, we conducted a detailed spatial analysis of 103 alluvial fans along the Doda, Tsarap, and Zanskar rivers. This approach allowed for precise mapping and characterization of these fans within complex depositional settings of ZB, particularly where fans merge into bajadas. Our analysis revealed distinct characteristics for the fans, including Fan Area (FA), Fan Slope (SF), Radius (R), Base Length of Fan (BF), Fan Maximum Entrenchment (FME), and Flow Expansion Angle (FEA). A morphometric analysis was then conducted to evaluate the correlation between the fans and their upstream basins. The linear regression analysis demonstrated both positive and negative correlations between these parameters, highlighting the important role of the upstream basins in controlling sediment delivery to fans. The findings suggest that larger basins contribute to the morphological development of fan systems, with larger, less steep fans forming as a result of greater flows and increased sediment supply from basins with denser drainage networks. Lower values of Mountain Front Sinuosity, Valley Floor Width to Valley Height ratio and Basin Elongation suggest that upstream basins in the ZB are significantly influenced by tectonic forces, resulting in linear mountain fronts, V-shaped valleys and elongated upstream basins. The F-99 fan, in particular, has developed a prominent stepped-fan morphology, attributed to differential uplift, vertical incision, and lateral migration of channels across the fan surface. Along the various fronts of the Zanskar, fan morphology is controlled by a complex interplay of long-term tectonic processes, climate, upstream lithology, and basin characteristics. Tectonic forces, particularly the NW-SE-trending ZSZ/STD and ZCT, exert first-order control on fan morphology by influencing sediment-flux and accommodation space. This influence is evident in tectonically modified landforms such as active mountain fronts, fan terraces, elongated basin shapes, wine-glass valleys and triangular facets, all indicating recent uplift and active tectonics in the region. Our results indicate that ZSZ and ZCT exert significant tectonic control over the geometry and evolution of fans, alongside substantial climatic influences.</div></div>","PeriodicalId":34142,"journal":{"name":"Quaternary Science Advances","volume":"16 ","pages":"Article 100240"},"PeriodicalIF":2.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666033424000789/pdfft?md5=f83a0bbaba05c44f81cebf42aea01462&pid=1-s2.0-S2666033424000789-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fatal landslides in Kencho, Shacha & Gozdi villages, Gofa zone, Ethiopia: A detailed investigation (Geological, Geotechnical, geophysical & geospatial) of the July 22, 2024 catastrophe and its socioeconomic repercussions","authors":"Leulalem Shano ,&nbsp;Bisirat Gisila ,&nbsp;Wondwosen Jerene ,&nbsp;Desta Ekaso ,&nbsp;Tigabu Baye ,&nbsp;Tariku Degife ,&nbsp;Geberemedin Chameno ,&nbsp;Zeleke Dosa ,&nbsp;Muralitharan Jothimani","doi":"10.1016/j.qsa.2024.100241","DOIUrl":"10.1016/j.qsa.2024.100241","url":null,"abstract":"<div><div>A landslide is one of the geological hazards that cause the most disaster in densely populated areas. The landslide that occurred in Gezie Gofa woreda, Gofa Zone, Kencho Shacha Gozdi village, killed more than 250 people. Two landslides occurred on July 22, 2024, at 8:30 and 10:40 AM The first landslide killed six people and demolished three houses. The second landslide killed more than 245 people, including those who came to the site to excavate the buried bodies during the first landslide. The primary objective of this research is to evaluate the landslide causative factors, model the landslide susceptibility, and characterize the landslide disaster on socioeconomic effects that occurred on July 22, 2024. The landslide inventory data, field surveys, laboratory analyses, and various geophysical surveys characterized the current and past landslides of the area. The landslide susceptibility model was modeled using a statistical approach in the GIS. environment. The socioeconomic effects were assessed using field surveys and systematic interviews with the victims. The conditioning factors selected for landslide susceptibility modeling are lithology, geological structures, groundwater, slope, land use or land cover, aspect, curvature, and elevation. The major triggering factor of the landslide in the area was heavy rainfall, which occurred on July 21–22, 2024, between 3:00 a.m.-8:30 a.m. The results reveal that the significant conditioning factors of the landslide in the study area are geological structures (both visible and inferred), groundwater, slopes, and human activities. The characterized socioeconomic effects include the destruction of agricultural land, the demolishing of houses, and the loss of human lives, as well as several people evacuated and sheltered under tents and churches. However, the most momentous disaster in the area is the loss of human life. Based on the research results, it would be better to relocate those people living in the high landslide susceptible zones, and all high landslide-prone areas and mountainous terrain in southern Ethiopia should be mapped, and the people should be aware of the landslide risk areas.</div></div>","PeriodicalId":34142,"journal":{"name":"Quaternary Science Advances","volume":"16 ","pages":"Article 100241"},"PeriodicalIF":2.9,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666033424000790/pdfft?md5=ab2c67342dd7ab845972981d0f49fe84&pid=1-s2.0-S2666033424000790-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142312415","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Slope stability analysis of colluvial deposits along the Muketuri-Alem Ketema Road, Northern Ethiopia","authors":"Hirei Mohammed Hussen ,&nbsp;Endalu Tadele Chala ,&nbsp;Nagessa Zerihun Jilo","doi":"10.1016/j.qsa.2024.100239","DOIUrl":"10.1016/j.qsa.2024.100239","url":null,"abstract":"<div><p>Slope failures are a significant natural geohazard in hilly and mountainous regions, often resulting in loss of life and infrastructure damage. The Muketuri-Alem Ketema road in Ethiopia is particularly vulnerable to landslides due to colluvial deposits on steep slopes from the higher northeastern plots to the lower Jemma River valley. This study investigates the characteristics of colluvial soil and evaluates the stability of slopes prone to landslides. It combines geophysical data, penetrometer tests, laboratory analyses, Google Earth images, and detailed field visits to assess the soil and bedrock composition and structure. Numerical methods, including limit equilibrium (Bishop, Janbu, Spencer, and Morgenstern-Price methods) and finite element methods, were used to analyze slope sections under various saturation conditions and simulate different rainfall patterns. The results indicate that the Bishop, Morgenstern-Price, and Spencer methods produce similar safety factors with minimal differences (&lt;0.3%), while the Janbu method shows more significant variation (1.5%–5.6%). Safety factor differences for sections A-A and B-B range from 5.26% to 9.86% and 3.5%–4.7%, respectively. Simulations reveal that short-term saturation significantly reduces the stability of the upper slope layer by 20%–46.76%, and long-term saturation decreases the entire slope section by 26.81%–46.76% compared to dry conditions due to increased pore water pressure and self-weight. Long-term saturation effects, combined with dynamic loads, can further reduce colluvial soil stability by over 50% compared to a dry static state. The finite element method predicts larger failure zones than limit equilibrium methods, emphasizing the need for accurate predictions to characterize slope behavior during failure and inform stabilization decisions. This study provides crucial data for maintaining and planning the Muketuri-Alem Ketema Road, highlighting slope performance over time and the effectiveness of stabilization techniques.</p></div>","PeriodicalId":34142,"journal":{"name":"Quaternary Science Advances","volume":"16 ","pages":"Article 100239"},"PeriodicalIF":2.9,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666033424000777/pdfft?md5=33a88157e782327a92f35f22255db235&pid=1-s2.0-S2666033424000777-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142244216","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Assessing phytolith preservation in a Late Quaternary loess-paleosol sequence from the Kashmir Valley, Northwest Himalaya, India","authors":"Waseem Qader ,&nbsp;Reyaz Ahmad Dar ,&nbsp;Ishfaq Ul Rehman ,&nbsp;Irfan Rashid ,&nbsp;Suhail Hussain Sheikh","doi":"10.1016/j.qsa.2024.100238","DOIUrl":"10.1016/j.qsa.2024.100238","url":null,"abstract":"<div><p>Phytolith content and its preservation in soils form a robust tool for paleoecological reconstruction. Post-depositional processes, however, influence the preservation of phytolith assemblages in soils thus making the paleoecological inferences biased. Here we evaluated the preservation of phytoliths in a Late Quaternary loess-paleosol sequence (LPS) from Kashmir Valley, northwest Himalaya. The soil micromorphological study, physicochemical parameters, phytolith morphometry, and phytolith translocation rates were employed to assess phytolith preservation and absence (not recorded) in the various litho-units of the Wanihama LPS. The comparison of phytolith content and soil physio-chemical parameters including pH, electrical conductivity, available N, P, K, organic carbon, extractable Fe, Zn, Mn and Cu do not show any significant correlation. This suggests that soil physicochemical parameters have a minor role in regulating the preservation of phytoliths in the LPS. The depth distribution of phytoliths exhibits an inconsistent pattern and phytolith content doesn't decrease systematically with depth. The phytolith content usually follows the loess-paleosol stratigraphy, with low concentrations in loess units and high concentrations in paleosols indicating that phytolith assemblages in the LPS have not been altered or translocated as a result of pedogenic processes. The micromorphological observations suggest weak pedogenesis and the sequence does not seem to be significantly mixed by bioturbation activities. This is augmented by the low translocation rate of &lt;18%, and phytolith morphometry suggesting well-preserved phytoliths with minimum morphological alterations along the depth. The absence of phytoliths at certain stratigraphic units in the LPS thus suggests that climatic conditions rather than physicochemical parameters determine the phytolith preservation and their content in the Kashmir LPS.</p></div>","PeriodicalId":34142,"journal":{"name":"Quaternary Science Advances","volume":"16 ","pages":"Article 100238"},"PeriodicalIF":2.9,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666033424000765/pdfft?md5=986c89f2f4ba916ab4ec34be09ef0610&pid=1-s2.0-S2666033424000765-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142244217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Individual isotopic niche variation of herbivores and palaeoenvironmental reconstruction of the Mid-Pleistocene Site of Kathu Pan 1 (South Africa)","authors":"Daryl Codron ,&nbsp;Nyebe E. Mohale ,&nbsp;Liora K. Horwitz","doi":"10.1016/j.qsa.2024.100236","DOIUrl":"10.1016/j.qsa.2024.100236","url":null,"abstract":"<div><p>Individual niche variation occurs when individuals within a population adopt unique behavioural or ecological traits, giving the population a distinct niche structure. Although widespread amongst natural populations, most of niche theory and its applications in ecological and palaeoenvironmental contexts remains focused on species level patterns, treating variation within the population as noise. Using serial stable isotope profiles sampled along teeth of herbivore fossils recovered from the Mid-Pleistocene site of Kathu Pan 1, Northern Cape (South Africa), enabling partitioning of isotopic niche variation into between- and within-individual components. Stable carbon isotope data revealed significant dietary differences between-individuals within most of the taxa sampled, but no dietary differences between taxa. By contrast, stable oxygen isotope compositions were more consistent amongst individuals, but varied across taxa. In both isotope systems, as well as in bivariate space, most taxa comprised individuals with both narrow and broad isotope niches, indicating flexibility in dietary strategies. These results indicate sufficient opportunity for individual level specialization within the Kathu palaeocommunity, afforded by a palaeoenvironment that provided a consistent supply of resources year-round. Given the herbivore sample is strongly associated with fossil hominin activities, our results imply that hominins in these landscapes would have profited from year-round accessibility to resources, accounting for the record of occupancy of Kathu Pan I during the Mid-Pleistocene.</p></div>","PeriodicalId":34142,"journal":{"name":"Quaternary Science Advances","volume":"16 ","pages":"Article 100236"},"PeriodicalIF":2.9,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666033424000741/pdfft?md5=9108e97f9dedb5057abb245828456238&pid=1-s2.0-S2666033424000741-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142244226","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"20Large mammal faunas and ecosystem dynamics during the late Middle to early Late Pleistocene at Grotta Romanelli (southern Italy)","authors":"B. Mecozzi ,&nbsp;F. Bona ,&nbsp;J. Conti ,&nbsp;G. Lembo ,&nbsp;G.S. Mariani ,&nbsp;I. Mazzini ,&nbsp;B. Muttillo ,&nbsp;P. Pieruccini ,&nbsp;R. Sardella","doi":"10.1016/j.qsa.2024.100237","DOIUrl":"10.1016/j.qsa.2024.100237","url":null,"abstract":"<div><div>Since the beginning of the XIX century, Grotta Romanelli gained recognition in European stratigraphy as an important site for the Late Pleistocene, due to the attribution of its basal sediments to the Last Interglacial (MIS 5e). Its abundant archaeological and paleontological findings made the cave a key reference point for the study of human evolution and faunal dynamics in the larger Mediterranean area over approximately the last 130,000 years. After a century, a new chronostratigraphic reassessment of Grotta Romanelli revised the timeframe of its lower levels, predating them to the late Middle Pleistocene.</div><div>In this study, we re-evaluate selected historical museum collections from the so-called “lower complex” of Grotta Romanelli and examine the new fossils excavated between 2015 and 2022. We identify three main mammal assemblages associated with three different interglacial periods spanning the last 350,000 years. Our findings offer new insights into terrestrial ecosystems in Mediterranean Europe from the late Middle Pleistocene to early Late Pleistocene. Additionally, they provide valuable information to the biochronological framework of the European large mammal faunas.</div></div>","PeriodicalId":34142,"journal":{"name":"Quaternary Science Advances","volume":"16 ","pages":"Article 100237"},"PeriodicalIF":2.9,"publicationDate":"2024-09-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666033424000753/pdfft?md5=0282d70d8bba8eb1f3ce46c75d06d272&pid=1-s2.0-S2666033424000753-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142314996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reviewer Thank you","authors":"","doi":"10.1016/j.qsa.2023.100069","DOIUrl":"10.1016/j.qsa.2023.100069","url":null,"abstract":"","PeriodicalId":34142,"journal":{"name":"Quaternary Science Advances","volume":"15 ","pages":"Article 100069"},"PeriodicalIF":2.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666033423000011/pdfft?md5=22c9a097ed38be1d02c2fe18ba67a97d&pid=1-s2.0-S2666033423000011-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142228663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Development of an automated extraction and radiocarbon dating method for fossil pollen deposited in lake Motosu, Japan","authors":"","doi":"10.1016/j.qsa.2024.100207","DOIUrl":"10.1016/j.qsa.2024.100207","url":null,"abstract":"<div><p>Recently, radiocarbon (¹⁴C) dating methods using fossil pollen extracted from sediments with a flow cytometer (cell sorter) are under development. Technical limitations experienced by previous studies required extraction of grains &lt;80 μm in diameter. Thus, obtaining a sufficient mass of carbon for dating requires extracting a very large number (∼10⁵) of grains. Another challenge faced by earlier work was preventing contamination by exotic carbon during the extraction process. Here we present a novel solution to this problem by using a cell sorter with a newly designed pretreatment method and an improved extraction method. This enables us to extract large pollen fossils than was previously possible. By using grains, &gt;100 μm in diameter, such as <em>Pinus</em> sp., we have reduced the number of grains for required for ¹⁴C dating by an order of magnitude, particularly when considering the recent advances in measure ultra-small carbon masses on a single-stage accelerator mass spectrometer at the Atmosphere and Ocean Research Institute, University of Tokyo. We then apply this method to sediments recovered from Lake Motosu, which already has a very robust chronology, to evaluate the new method. Results indicate the method is successful and reveal temporal radiocarbon reservoir effects that appear related to the changes in the depositional environment and/or hydroclimate. The method presented here is widely applicable across multiple environments.</p></div>","PeriodicalId":34142,"journal":{"name":"Quaternary Science Advances","volume":"15 ","pages":"Article 100207"},"PeriodicalIF":2.9,"publicationDate":"2024-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666033424000455/pdfft?md5=3731e2edf09ad0b65cdbca421c9cd153&pid=1-s2.0-S2666033424000455-main.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141414245","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}