Quaternary International最新文献_第5页

Late Quaternary birds from Lajedo de Soledade, Rio Grande do Norte, Brazil 巴西北部大德州Lajedo de Soledade晚第四纪鸟类

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-11-27 DOI: 10.1016/j.quaint.2025.110054

João Paulo da Costa , Marcos Cenizo , Mário André Trindade Dantas , Fabiana Monteiro de Oliveira , Kita Chaves Damasio Macario , Guilherme Renzo Rocha Brito , Kleberson de Oliveira Porpino , Hermínio Ismael de Araújo-Júnior

The Lajedo de Soledade (NE Brazil) is an extensive carbonate platform intersected by a series of ravines, sculpted by karstification processes. This region stands out for its paleontological relevance due to the diversity of fossil vertebrates found in the Late Quaternary deposits filling several of its ravines. New collections at Ravina das Araras, together with a reanalysis of near-coeval fossil assemblages previously found at Ravina do Leon, revealed the presence of at least nine different avian taxa, including vultures (Pleistovultur nevesi, Cathartes sp.), hawks (Buteoninae indet.), doves and pigeons (Zenaida auriculata and Patagioenas sp.), parakeets (cf. Aratinga sp.), tinamous (Rhynchotus rufescens and Crypturellus sp.), and ducks (Cairina moschata). With the exception of the extinct condor P. nevesi, current representatives of the identified taxa inhabit dry tropical grasslands, savannas and riparian forests of the Caatinga biome, including the Lajedo de Soledade region. For the first time, direct radiocarbon dating and isotopic analysis of the diet of a P. nevesi individual (Ravina do Leon specimen) were obtained, indicating that this bird (estimated body mass = 11.2 kg) fed on carcasses of animals that predominantly inhabited open areas during the Late Pleistocene (i.e., 34,772–36,986 cal yr BP). The Lajedo de Soledade ravines contain Late Pleistocene deposits with a diverse range of vertebrates, including mammals, reptiles, anurans, and notably, birds, which is unusual in other regional Quaternary deposits.

Lajedo de Soledade（巴西东北部）是一个广阔的碳酸盐台地，由一系列由岩溶作用雕刻而成的沟壑相交。该地区因其与古生物学的相关性而引人注目，因为在填满其峡谷的晚第四纪沉积物中发现了脊椎动物化石的多样性。在Ravina das Araras的新收藏，以及对先前在Ravina do Leon发现的近同时期化石组合的重新分析，揭示了至少9种不同的鸟类分类群的存在，包括秃鹫（Pleistovultur nevesi, Cathartes sp.），鹰（Buteoninae indet.），鸽子和鸽子（Zenaida auriculata和Patagioenas sp.），长尾小鹦鹉（cf. Aratinga sp.），鸣鸟（Rhynchotus rufescens和Crypturellus sp.）和鸭子（Cairina moschata）。除已灭绝的秃鹰P. nevesi外，目前已确定的分类群代表栖息在Caatinga生物群系的干燥热带草原、稀树草原和河岸森林，包括Lajedo de Soledade地区。研究人员首次对一种nevesi鸟个体（Ravina do Leon标本）的饮食进行了直接放射性碳定年和同位素分析，表明这种鸟（估计体重= 11.2 kg）在晚更新世（即34,772-36,986 cal yr BP）期间主要以生活在开阔地区的动物尸体为食。Lajedo de Soledade峡谷含有晚更新世沉积物，其中有各种各样的脊椎动物，包括哺乳动物，爬行动物，无尾动物，特别是鸟类，这在其他区域第四纪沉积物中是不寻常的。

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引用次数: 0

The role of climate and eustatic sea-level changes in post-Eemian sedimentary succession in the southern Baltic Sea region 波罗的海南部地区eemian后沉积演替中气候和海平面上升变化的作用

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-11-27 DOI: 10.1016/j.quaint.2025.110056

Robert J. Sokołowski , Anna Hrynowiecka , Monika Czajkowska , Piotr Moska

Multiproxy analyses were employed to determine the age and origin of the Pleistocene sedimentary succession at the Kadyny site in the northern part of the Elbląg Heights, northern Poland. Lithofacies analysis yielded the identification of four distinct lithofacies complexes (U1-U4). The units of analysis are fluvial (U1, U3 and U4) and lacustrine-lagoonal sedimentary environments (U2). The formation of the site commenced with the Early Vistulian (units U1, U2 and lower part of U3) and the Lower and Middle Pleniglacial (upper part of unit U3 and unit U4). The sequence of depositional environments was controlled by transgressive-regressive cycles functioning in a glacial-interglacial (main cycle) and stadial-interstadial (secondary cycle) rhythm. The textural characteristics of the sediments and the evolution of vegetation were influenced by climatic factors. The warmest climatic conditions prevailed during the deposition of unit U2 (Odderade Interstadial), which was deposited as a result of fluctuations in the water level in a coastal lake or lagoon separated from the open sea by a sandy spit. The analysed sediments are part of thrust-bounded ridges that form the Elbląg Glacitectonic Complex. These were subsequently thrust-stacked and imbricated, which occurred during the Marine Isotope Stage (MIS) 2 period. This process occurred in two distinct phases: initially from the west, and subsequently from the north. The displacement of the deformed sediments is believed to have taken place over a distance of 10–30 km from the area that is now occupied by the Gulf of Gdańsk.

采用多代理分析方法确定波兰北部Elbląg高地北部Kadyny遗址更新世沉积演替的年龄和起源。岩相分析鉴定出四个不同的岩相复合体（U1-U4）。分析单元为河流环境（U1， U3和U4）和湖-泻湖沉积环境（U2）。遗址的形成始于早维斯陶纪（U1、U2单元和U3单元的下部）和下、中冰期（U3单元和U4单元的上部）。沉积环境序受冰期-间冰期（主旋回）和冰期-间冰期（次旋回）海侵旋回控制。沉积物的结构特征和植被的演变受气候因素的影响。U2单元（Odderade Interstadial）的沉积期间气候条件最温暖，这是由于一个沿海湖泊或泻湖的水位波动而沉积的，该湖泊或泻湖被一个沙嘴与公海隔开。分析的沉积物是冲断边界脊的一部分，形成Elbląg冰川构造复合体。这一过程发生在海洋同位素阶段（MIS） 2时期。这个过程发生在两个不同的阶段：最初从西部开始，随后从北部开始。据信，变形沉积物的位移发生在距离现在被Gdańsk海湾占据的地区10-30公里的地方。

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引用次数: 0

Fossil records of Bovidae and Cervidae from the Late Pliocene and Early Pleistocene of Slovenia: Implications for Eurasian correlations and evolution of ungulate fauna communities 斯洛文尼亚晚上新世和早更新世牛科和鹿科的化石记录：对欧亚关系和有蹄类动物群落进化的启示

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-11-27 DOI: 10.1016/j.quaint.2025.110060

Urszula Ratajczak-Skrzatek , Slavko Polak , Karol Karbowski , Marjan Temovski , Paweł Mackiewicz , Andrea Savorelli , Krzysztof Stefaniak

The article presents new discoveries of fossil remains of herbivorous mammals from the Plio–Pleistocene transition, including representatives of the genera Megalovis and Metacervocerus, found in the Črnotiče Quarry in Slovenia, in layers dated to the Early Pleistocene. The identified remains of Megalovis latifrons and Metacervocerus rhenanus provide significant evidence of the presence of these species in the southern part of Central Europe during the Early Pleistocene. These remains represent the first described examples of these taxa from Slovenia and provide valuable material for studies on the biogeography and evolution of fauna during the Early Pleistocene. This discovery offers crucial insights into the dispersal of fauna from Asia to Europe and suggests that the southern region of Slovenia may served as a migration corridor for these taxa. The conducted morphometric analysis of the teeth and postcranial bones allowed for a comparison of dimensions in the context of geographical and ecological changes, highlighting morphological variability within these taxa and potential adaptations to changing environmental conditions. In particular, the differences in the dimensions of the teeth and skeletal bones may indicate regional variations in size and morphology of the Megalovis and Metacervocerus representatives, which could result from ecological diversity in Early Pleistocene Europe. Phylogenetic analyses of Megalovis remains suggested at least two migration waves from Central Asia to Europe and shed new insight into the taxonomic affiliation of available samples.

这篇文章介绍了在斯洛文尼亚Črnotiče采石场发现的从上新世到更新世过渡时期的食草哺乳动物化石遗骸的新发现，包括Megalovis属和Metacervocerus属的代表，这些化石可追溯到早更新世。已发现的Megalovis latifrons和Metacervocerus renanus的遗骸为早更新世中欧南部地区存在这些物种提供了重要证据。这些遗存是斯洛文尼亚首次描述的这些分类群的例子，为研究早更新世的生物地理学和动物进化提供了宝贵的材料。这一发现为动物从亚洲到欧洲的迁徙提供了重要的见解，并表明斯洛文尼亚南部地区可能是这些分类群的迁徙走廊。对牙齿和颅后骨进行的形态计量学分析允许在地理和生态变化的背景下进行尺寸比较，突出了这些分类群内的形态变异性以及对不断变化的环境条件的潜在适应。特别是，牙齿和骨骼尺寸的差异可能表明Megalovis和Metacervocerus代表在尺寸和形态上的区域差异，这可能是早更新世欧洲生态多样性的结果。巨齿鳄遗骸的系统发育分析表明，至少有两次从中亚到欧洲的迁徙浪潮，并为现有样本的分类关系提供了新的见解。

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引用次数: 0

Late Pleistocene and Middle Holocene dynamic environmental transitions in sediments of drainless depressions (Raciąska Plain, Poland) in the context of regional climate changes 区域气候变化背景下波兰Raciąska平原无排水洼地沉积物的晚更新世-中全新世动力环境变迁

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-11-26 DOI: 10.1016/j.quaint.2025.110068

Joanna Gadziszewska , Monika Niska , Jerzy Jonczak

The Raciąska Plain is a foreland area marking the extent of the last glaciation, located along the outflow of glacial waters. For years, it has been the subject of scientific interest due to its distinctive terrain morphology. In the vicinity of the Wkra River valley, there are endorheic depressions where the sedimentation of organic deposits takes place. The properties of the sediments accumulating at the bottom of these basins result from fluctuations in climatic and environmental conditions, making them sensitive indicators of environmental change. The aim of the conducted research was to reconstruct the evolutionary history of the Mak endorheic basin by analyzing organic sediments from two profiles (Mak-1, Mak-2). The analysis of two profiles from different zones of the same basin—with varying morphometric characteristics and differing degrees of connectivity with river waters—made it possible to trace the ecosystem's response to regional climate changes and to compare the differences and similarities in the biotic and abiotic responses recorded in the sediments. As part of the study, palynological, geochemical, and microfaunal (Cladocera) analyses were carried out on sediments deposited during the Late Glacial as well as the Early and Middle Holocene. The results indicate varying dynamics of sediment accumulation at the studied sites, which stem from local geomorphological and hydrological conditions. The differing directions of environmental change in the two profiles are evidenced by the distinct species composition and frequency of cladocerans, as well as differences in the presence of non-pollen palynomorphs (CAZM, LPAZ). The Mak-1 profile more clearly reflects the dynamics of fluctuations in climatic and hydrological conditions. In contrast, sediment accumulation in the Mak-2 profile occurred under more stable conditions, which favored the accumulation of organic matter and the development of aquatic biocenoses. The findings provide valuable information on environmental changes in the Raciąska Plain, contributing to the existing body of paleoecological data and offering comparative material for regional analyses. They also highlight the importance of a multi-site approach in reconstructing the natural history of water bodies.

Raciąska平原是一个标志着末次冰期范围的前陆地区，位于冰川水的流出处。多年来，由于其独特的地形形态，它一直是科学兴趣的主题。在Wkra河流域附近，有内海坳陷，在那里发生了有机沉积物的沉积。这些盆地底部积聚的沉积物的性质是气候和环境条件波动的结果，使其成为环境变化的敏感指标。通过对两个剖面（mak1、mak2）有机沉积物的分析，重建了Mak内海盆地的演化历史。对同一流域不同地区的两条剖面进行分析——它们具有不同的形态特征和与河水的不同程度的连通性——使得追踪生态系统对区域气候变化的响应，并比较沉积物中记录的生物和非生物响应的异同成为可能。作为研究的一部分，孢粉学、地球化学和微动物（枝角类）分析在晚冰期和全新世早期和中期沉积的沉积物中进行。研究结果表明，研究地点泥沙积累的动态变化源于当地的地貌和水文条件。两个剖面的环境变化方向不同，主要表现在枝海类的种类组成和出现频率不同，以及非花粉类存在的差异（CAZM， LPAZ）。mak1剖面更清楚地反映了气候和水文条件波动的动态。相比之下，mak2剖面的沉积物聚集发生在更稳定的条件下，有利于有机质的聚集和水生生物群落的发育。这些发现为Raciąska平原的环境变化提供了有价值的信息，为现有的古生态数据体系做出了贡献，并为区域分析提供了比较材料。他们还强调了多地点方法在重建水体自然历史中的重要性。

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引用次数: 0

Vegetation pattern and succession from LGM to early Holocene in the eastern coastal zone of China 中国东部沿海地区LGM -全新世早期植被格局与演替

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-11-22 DOI: 10.1016/j.quaint.2025.110057

Guangyi Bai , Keliang Zhao , Jian Wang , Lili Lu , Xiaoqiang Li

The eastern coastal zone of China plays a pivotal role in both terrestrial-marine ecosystem interactions and human subsistence in East Asia. During the deglaciation period from the Last Glacial Maximum (LGM, ∼21ka BP) to the early Holocene, rapid sea-level rise significantly influenced coastal and shelf ecosystems. However, the vegetation ecological landscape across the exposed shelf during this transgression remains poorly constrained. In this study, we integrate pollen and sedimentary records from representative marine and terrestrial cores collected in the eastern coastal zone of China and apply the biomization method to reconstruct vegetation patterns during key periods (LGM, 15 ka BP, 12 ka BP, and 10 ka BP) from the LGM to the early Holocene. Additionally, we examine the potential mechanisms underlying vegetation shifts in the coastal zone.

Our results show that during the LGM, the exposed Bohai and Yellow Sea shelf were primarily covered by steppe and meadow dominated by Artemisia and Chenopodioideae (Amaranthaceae), while the East China Sea shelf supported forest steppe to deciduous broadleaved forest. During the Last Deglaciation, the warmer climatic condition and rising sea level triggered a shift from terrestrial to marine deposition, driving a northward vegetation migration and the replacement of steppe by forest. Concurrently, sea-level fluctuation promoted the development of azonal vegetation in coastal zone. By the early Holocene, vegetation diversity increased, with steppe and meadow re-expanding along the Bohai and Yellow Sea coast, while the East China Sea coast became dominated by mixed deciduous-evergreen broadleaved forest. Our findings offer a scientific framework for predicting coastal ecosystem responses to future warming and illuminate the ecological context of human activities during periods of shelf exposure.

中国东部沿海地区在东亚陆海生态系统相互作用和人类生存中起着关键作用。在末次盛冰期（LGM, ~ 21ka BP）至全新世早期的消冰期，海平面的快速上升对沿海和陆架生态系统产生了显著影响。然而，在这次海侵期间，裸露陆架上的植被生态景观仍然没有得到很好的约束。本研究综合了中国东部沿海代表性海相和陆相岩心的花粉和沉积记录，应用生物化方法重建了LGM -全新世早期关键时期（LGM、15 ka BP、12 ka BP和10 ka BP）的植被格局。此外，我们还研究了海岸带植被转移的潜在机制。结果表明，在LGM期间，裸露的渤海和黄海陆架主要被以蒿科和藜科植物为主的草原和草甸覆盖，而东海陆架则支持森林草原到落叶阔叶林。在末次消冰期，气候变暖和海平面上升引发了从陆地沉积到海洋沉积的转变，推动了植被向北迁移，森林取代了草原。同时，海平面波动促进了海岸带地带性植被的发展。到全新世早期，植被多样性增加，沿渤海和黄海沿岸草原和草甸重新扩张，而东海沿岸以落叶-常绿阔叶林为主。我们的研究结果为预测沿海生态系统对未来变暖的反应提供了一个科学框架，并阐明了大陆架暴露期间人类活动的生态背景。

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引用次数: 0

Microtexture and provenance signatures for oscillations of the late Pleistocene Scandinavian Ice Sheet in Rautuvaara, north-western Finland 芬兰西北部Rautuvaara晚更新世斯堪的纳维亚冰盖振荡的显微结构和物源特征

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-11-19 DOI: 10.1016/j.quaint.2025.110055

Ninna Immonen , Kari Strand , Pertti Sarala , Juha Pekka Lunkka

In order to understand sedimentary processes and dynamics of ice sheet oscillations on the eastern flank of the Scandinavian Ice Sheet (SIS) near its glaciation centre, we carried out quartz grain surface microtextural, and heavy mineral studies from the Rautuvaara section in north-western Finland which has widely considered as the stratotype for the northern Fennoscandian Late Pleistocene. We investigated the two uppermost Middle-Late Weichselian tills and the interbedded fine sediments, which, according to published age constraints, were deposited during the late Pleistocene Marine Isotope Stages (MIS) 3 and 2. The purpose of this study is to use varietal heavy mineral analysis to better constrain sediment sources for studied sediments and to test a theory of ice flow origin in this area. Microtextural study is used to identify first cycle subglacial processes from multiple transport processes during deglaciations.

At the stratigraphically lowest studied till bed, the sediment grain characteristics indicate that primary transport processes were subglacial and the SIS advanced from SSW across the area during the Middle Weichselian (MIS 3) as skarn and iron ore minerals are dominant heavy minerals. The upper part of the till bed bears an imprint of some longer distance transport processes from NW granitoid dominant provenance. The grain surface microtextures of the overlying sandy diamicton bed do not show any specific transport signature, suggesting that this bed consist of supra- or englacial debris deposited by a retreating ice front through mass flow. Subsequent layers of interbedded horizontal to rippled and massive sand and silt are characteristic of glaciofluvial transport processes representing shallow to deepening water conditions and gradually basin filling in a glaciolacustrine setting. The occurrence of highly stable detrital minerals in sand, like epidotite, garnet and zircon indicate clear reworking of earlier materials. The uppermost massive till represents Late Weichselian (MIS 2) glacial advance phase again dominantly from SW including reworked Rautuvaara iron ore indicative heavy minerals and showing multiple transport histories in quartz sand grains microtextures, being affected by some chemical abrasion.

为了了解斯堪的纳维亚冰盖（SIS）东侧冰川中心附近的沉积过程和冰盖振荡动力学，我们在芬兰西北部的Rautuvaara剖面进行了石英颗粒表面微结构和重矿物研究，该剖面被广泛认为是北芬诺斯坎德晚更新世的层型。我们研究了两个最上层的中-晚期魏奇塞世斜坡和互层细粒沉积物，根据已发表的年龄限制，它们沉积于晚更新世海相同位素阶段（MIS） 3和2。本研究的目的是利用各种重矿物分析来更好地约束所研究沉积物的沉积物来源，并验证该地区冰流起源的理论。微结构研究用于从脱冰过程的多个输运过程中识别第一旋回冰下过程。在地层最底层，沉积物颗粒特征表明，主要的搬运过程为冰下搬运，在中魏希世（MIS 3），矽卡岩和铁矿矿物是主要的重矿物，从SSW向整个地区推进。土层上部有来自NW花岗质优势物源的较长距离输运的印记。上覆砂质直径层的颗粒表面显微结构没有显示出任何特定的搬运特征，表明该层是由冰锋通过物质流消退而沉积的冰上或冰上碎屑组成的。随后的层状互层水平到波纹和块状沙粉是冰川-河流运输过程的特征，代表了冰川-湖泊环境下浅到深的水条件和逐渐的盆地填充。黄铁矿、石榴石、锆石等碎屑矿物具有较高的稳定性，表明早期物质发生了明显的改造。最上面的块状矿体代表晚期魏希塞利世（MIS 2）冰川推进期，主要来自西南，包括重加工的Rautuvaara铁矿，指示重矿物，在石英砂颗粒微结构中显示出多种运输历史，受一定的化学磨损影响。

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引用次数: 0

New insights into the formation of postglacial fracture valleys in Denmark using LiDAR, and towed Transient Electromagnetic Methods 利用激光雷达和牵引瞬变电磁法对丹麦冰川后断裂山谷形成的新见解

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-11-19 DOI: 10.1016/j.quaint.2025.110052

Nicolaj K. Larsen , Kristian B.K. Romvig , Lis Allaart , Christos Boufidis , Thue S. Bording

The presence of postglacial fracture valleys in Denmark has been known since the early 20th century. Their mode of formation has never been fully understood, but they are often considered to originate from the reactivation of deep-seated faults in postglacial time in relation to glacio-isostatic adjustments. This study investigates fracture valleys from Denmark regarding their morphology, age, and mode of formation using high-resolution LiDAR, and towed Transient Electromagnetic Method (tTEM). Eleven areas in central Jutland have been found to host 371 fracture valleys. The c. 0.04–8 km long fracture valleys are in most places located parallel to tunnel valleys, which are cut into Paleogene clays. Based on the cross-cutting relationship between the fracture valleys and glacial- and periglacial landscape features, our study confirms that they were formed in postglacial time, most likely between c. 18–15 ka BP. Our findings suggest that the fracture valleys in Denmark are unrelated to deep tectonic faults and instead developed on the flanks of tunnel valleys cut into Paleogene clays by differential compaction by glacial loading and unloading during the last glaciation. The differential compaction led to local failures along tunnel valleys that are expressed in the present land surface as 5–10 m deep fracture valleys. Our findings may have important societal implications concerning the risk assessment of neotectonic activity in Denmark.

自20世纪初以来，人们就知道丹麦存在冰期后断裂谷。它们的形成方式从未被完全理解，但它们通常被认为是源于冰川-均衡调整相关的后冰期深部断裂的再激活。本研究利用高分辨率激光雷达和牵引瞬变电磁法（tTEM）研究了丹麦裂缝谷的形态、年龄和形成模式。在日德兰半岛中部的11个地区发现了371个裂缝谷。长0.04 ~ 8 km的裂缝谷多与隧道谷平行，由古近系粘土切割而成。根据断裂谷与冰川和冰缘景观特征的交叉关系，我们的研究证实它们形成于冰期后，最有可能在c. 18-15 ka BP之间。研究结果表明，丹麦的裂缝谷与深部构造断裂无关，而是在末次冰期冰川加载和卸载的不同压实作用下，在古近系粘土中切割的隧道谷两侧发育的。压实差异导致沿隧道谷的局部破坏，在现今地表表现为5 ~ 10m深的断裂谷。我们的发现可能对丹麦新构造活动的风险评估具有重要的社会意义。

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引用次数: 0

Evidence of bipolar knapping of mammoth ivory at Medzhybizh A: Technological and experimental insights from a lower Palaeolithic context Medzhybizh A地区猛犸象象牙双极性断裂的证据：来自旧石器时代较低背景的技术和实验见解

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-11-19 DOI: 10.1016/j.quaint.2025.110049

Oleksandr Naumenko , Vadim Stepanchuk

This paper presents the results of a technological and experimental study of mammoth ivory artefacts recovered from Layer II–I of the Medzhybizh A Lower Palaeolithic site in western Ukraine. Ivory is an unusual material in prehistoric knapping traditions, especially in earlier periods. Our experiments demonstrate that the workability of ivory depends strongly on its preservation state: over-dried specimens are brittle and fragment easily, while better-preserved ones allow more controlled knapping. The analysis identifies diagnostic traces of intentional modification on archaeological specimens, including bipolar on anvil knapping features, scars, facets, impact points, and intensive edge trimming. A deliberately shaped ivory pieces produced by knapping suggests that hominins at Medzhybizh A employed a flexible and opportunistic raw material strategy, occasionally experimenting with ivory as a substitute for lithic materials. While the technological actions mirror stone knapping techniques, no evidence indicates adaptation to the specific properties of ivory. The results provide unique insights into the variability and adaptability of raw material strategies during the Middle Pleistocene and contribute to discussions on early ivory processing traditions.

本文介绍了对乌克兰西部梅德日比什旧石器时代晚期遗址i - i层出土的猛犸象象牙制品进行技术和实验研究的结果。在史前的敲击传统中，象牙是一种不寻常的材料，尤其是在早期。我们的实验表明，象牙的可加工性在很大程度上取决于其保存状态：过度干燥的标本易碎，容易破碎，而保存较好的标本则可以更有控制地敲击。分析确定了考古标本上故意修改的诊断痕迹，包括双极砧敲击特征、疤痕、切面、冲击点和密集的边缘修剪。在Medzhybizh A，一件经过精心雕琢的象牙制品表明，古人类采用了一种灵活的、机会主义的原材料策略，偶尔会尝试用象牙来代替石器材料。虽然这些技术行动反映了石头敲击技术，但没有证据表明它们适应了象牙的特定特性。研究结果对中更新世期间原料策略的可变性和适应性提供了独特的见解，并有助于讨论早期象牙加工传统。

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引用次数: 0

The Early Acheulean on the Ethiopian highlands: The case of Gombore IB at Melka Kunture (Upper Awash, Ethiopia) 埃塞俄比亚高原上的早期阿舍利人：以Melka Kunture（上阿瓦什，埃塞俄比亚）的Gombore IB为例

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-11-19 DOI: 10.1016/j.quaint.2025.110050

Eduardo Méndez-Quintas , Margherita Mussi

引用次数: 0

Tectonic and climatic controls on the evolution of the middle Yellow River: new insights from sedimentology and detrital zircon U-Pb geochronology 构造和气候对黄河中游演化的控制：沉积学和碎屑锆石U-Pb年代学的新认识

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-11-19 DOI: 10.1016/j.quaint.2025.110059

Xu Lin , Haijin Liu , Jing Liu-Zeng , Milo Barham , Maximilian Dröllner , Siyi Li

Understanding the formation and evolution of the middle reaches of the Yellow River is essential for comprehending the overall development of the modern Yellow River. However, two competing hypotheses propose that the formation of the middle Yellow River occurred either during the Neogene or the Quaternary. To resolve this ambiguity, we performed detrital zircon U-Pb geochronology (n = 275) and particle size analysis (n = 490), as part of a broader sedimentological investigation of Neogene strata within the Jinshan Canyon and Sanmenxia Basin of the middle Yellow River and contextualized these data with published paleomagnetic ages and regional tectonic and climatic data. Within the middle Jinshan Canyon, detrital sediments in the Weijiawa section at 8.1 Ma primarily originated from the adjacent Lvliang Mountains. However, the detrital sediments in the nearby Mujiawa section at 3.6 Ma are significantly influenced by the more distal northern Ordos Block suggesting longer distance fluvial connectivity. The composition of clastic materials in the Jiwangqiao section of Sanmenxia Basin to the south of the Jinshan Canyon is influenced by the Wei River and proximal Zhongtiao Mountains at 5.0 and 3.6 Ma, while it is shaped by the Yellow River in the middle reaches at 4.4 and 3.8 Ma. The observed provenance changes can be primarily attributed to enhanced recycling of Mesozoic sandstone and mudstone, driven by three key factors: (1) the northeastward expansion of the Tibetan Plateau, (2) the intensification of the East Asian summer monsoon system, and (3) inherent lithological variations within the geological formations. This reflects the complex interplay between tectonic activity, climatic forcing, and bedrock susceptibility in shaping the regional geomorphology.

了解黄河中游的形成与演变，对全面认识近代黄河的发展至关重要。然而，两种相互竞争的假说认为，黄河中游的形成可能发生在新近纪或第四纪。为了解决这一模糊性，我们进行了碎屑锆石U-Pb年代学（n = 275）和粒度分析（n = 490），作为黄河中段金山峡谷和三门峡盆地新近系地层更广泛的沉积学研究的一部分，并将这些数据与已发表的古地磁年龄和区域构造和气候数据进行了对比。在金山峡谷中部，8.1 Ma魏家洼剖面碎屑沉积物主要来源于相邻的吕梁山脉。而穆家洼剖面附近3.6 Ma的碎屑沉积物则明显受到鄂尔多斯地块北部较远端的影响，表明河流连通性较长。金山峡谷以南三门峡盆地冀王桥段碎屑物质组成受渭河和中条山近端5.0和3.6 Ma的影响，而中游4.4和3.8 Ma受黄河的影响。这反映了构造活动、气候强迫和基岩敏感性在形成区域地貌方面的复杂相互作用。

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