Quaternary International最新文献_第5页

Bayhead delta-dominated transgressive succession in the Quaternary Ishikari incised valley, Hokkaido, Japan 日本北海道第四纪石笠切割谷湾头三角洲主导的海侵演替

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-12-12 DOI: 10.1016/j.quaint.2025.110048

Gentaro Kawakami , Katsumi Kimura , Tsumoru Sagayama

Thick bayhead delta successions were rarely formed in incised valleys during the rapid postglacial transgressions, as accommodation creation generally outpaced sediment supply. Under such conditions, bayhead shorelines tended to develop rather than thick deltaic deposits. However, an unusually thick (∼30 m) bayhead delta-dominated transgressive succession was identified in the Ishikari incised valley, Hokkaido, Japan, through a reanalysis of three sediment cores. Sequence stratigraphic analysis, integrated with engineering boreholes, identified four backstepping parasequences (PS-1 to PS-4, in ascending stratigraphic order) in the succession, each bounded by a flooding surface (FS-1 to FS-4). While FS-1, FS-3, and FS-4 correspond to global or regional sea-level rise events, FS-2 likely reflects a localized increase in accommodation governed by terrace-fringed valley morphology. Each parasequence comprises stacked mouth bars that likely developed during periods of increasing salinity, as indicated by diatom assemblages and bioturbation intensity. This suggests that bayhead delta aggradation occurred in response to progressive basin deepening. Despite episodic landward retreat of the transgressive system at each flooding surface, bayhead delta deposition persisted throughout the transgression. This persistence reflected a sustained balance between sediment supply and accommodation creation, likely maintained by sediment input from multiple tributaries. Moreover, sediment retention, enhanced by the constricted valley geometry and the early formation of coastal barriers at the valley mouth, probably promoted efficient sediment trapping. The Ishikari case, together with other examples from tectonically active settings, demonstrates that even under relatively rapid sea-level rise, small-to medium-sized incised valleys with nearby sediment sources can sustain thick deltaic accumulation.

在快速的冰期后海侵过程中，由于容纳空间的创造通常超过沉积物的供应，在切下的山谷中很少形成厚湾头三角洲序列。在这种条件下，湾头岸线的发育比较厚的三角洲沉积更为明显。然而，通过对三个沉积物岩心的重新分析，在日本北海道Ishikari切割山谷中发现了异常厚（~ 30 m）的海湾三角洲主导的海侵演替。层序地层分析结合工程钻孔，确定了4个逆退副层序（PS-1 ~ PS-4，按地层升序排列），每一个层序都有一个泛水面（FS-1 ~ FS-4）。虽然FS-1、FS-3和FS-4对应于全球或区域海平面上升事件，但FS-2可能反映了由阶地边缘山谷形态控制的局部调节增加。根据硅藻组合和生物扰动强度，每个准层序包括可能在盐度增加时期发育的堆积河口坝。这表明海湾三角洲沉积是对盆地逐渐加深的响应。尽管在每个泛洪面海侵体系都有阶段性的向陆退缩，但海湾三角洲的沉积在整个海侵过程中持续存在。这种持续性反映了泥沙供应和调节创造之间的持续平衡，可能是由多个支流的泥沙输入维持的。此外，由于山谷狭窄的几何形状和山谷口早期形成的海岸屏障，沉积物滞留可能促进了有效的沉积物捕获。石kari案例以及其他构造活动背景的例子表明，即使在海平面相对快速上升的情况下，具有附近沉积物源的中小型切割山谷也可以维持较厚的三角洲堆积。

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引用次数: 0

The Lateglacial fossil avifauna from Grotta del Romito (Calabria, Southern Italy) and the exploitation of birds by the Upper Paleolithic hunters Grotta del Romito（意大利南部卡拉布里亚）的冰河鸟类化石和旧石器时代晚期猎人对鸟类的利用

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-12-11 DOI: 10.1016/j.quaint.2025.110083

Lisa Carrera , Fabio Martini

Grotta del Romito represents one of the most relevant Upper Palaeolithic sequences of Southern Italy, spanning the end of the Last Glacial Maximum and the Lateglacial (GS1 and GI1) and providing remarkable insights on the Gravettian and Epigravettian lifeways and symbolic behaviours. With this work, we analyse the avian assemblage from Grotta del Romito in order to clarify the dynamics of bird exploitation by the Upper Paleolithic people and assess changes in the paleonvironment due to the Lateglacial climatic shift. Based on the bird species, the surroundings of the cave were characterized by forests alternated with open grasslands, rocky exposures and riverine or marshy habitats. Between unit E and unit D the bird taxa indicate a change from grassland-dominated habitats to forest-dominated habitats, correlated with the beginning of the GI1. The food exploitation of birds, indicated by a number of anthropic modifications, is more intense in the Final Epigravettian and involves Galliformes, Anatidae, Rallidae, Otidiformes, Strigidae, Accipitridae, Falconidae, Corvidae and Passseriformes. The Final Epigravettian hunter-gatherers of Grotta del Romito were also interested in the wings of large Accipitridae (Aquila chrysaetos, cf. Gyps fulvus) for utilitarian purposes or symbolic-mediated behaviour.

Grotta del Romito代表了意大利南部最相关的旧石器时代晚期序列之一，跨越了末次盛冰期和冰河期（GS1和GI1）的末期，并提供了关于格拉韦特人和后格拉韦特人的生活方式和象征性行为的重要见解。通过这项工作，我们分析了Grotta del Romito的鸟类组合，以阐明旧石器时代晚期人类对鸟类的开发动态，并评估由于冰川气候变化而导致的古环境变化。根据鸟类种类，洞穴周围的特征是森林与开阔的草原、岩石暴露和河流或沼泽栖息地交替存在。在单位E和单位D之间，鸟类类群由草地为主生境向森林为主生境转变，与GI1开始相关。鸟类的食物开发在末上移期更为激烈，包括鸡形目、鸭形目、鸟形目、鸟形目、刺形目、刺形目、鹰形目、鸦形目和雀形目。Grotta del Romito的最后的Epigravettian狩猎采集者也对大型阿奎拉科（Aquila chrysaetos，参见Gyps fulvus）的翅膀感兴趣，因为它们具有实用目的或象征媒介行为。

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引用次数: 0

The new key sections of the Last Interglacial transgression in the Eurasian Arctic (Eastern White Sea): paleoenvironmental reconstructions and interregional correlations 欧亚北极（东白海）末次间冰期海侵新关键剖面：古环境重建与区域间对比

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-12-03 DOI: 10.1016/j.quaint.2025.110067

Nataliya Zaretskaya , Ekaterina Taldenkova , Maksim Ruchkin , Yaroslav Ovsepyan , Olga Rudenko , Irina Timofeeva

New stratigraphic, micropaleontological and geochronometric (optically stimulated luminescence, OSL) data for the basal sediment units of the six sections around the periphery of the Kuloi Plateau (Zimnii Coast and Soyana-Kuloi River valley) assign them to the end of MIS 6 – MIS 5 Boreal (Eemian) transgression in the eastern White Sea Region. Most of the studied Boreal marine beds are composed of two units, with the dark grey fossiliferous silty clay overlain by beige and light grey loose (sand and gravel) variously bedded material. Presumably high sedimentation rates due to the proximity to the Kuloi Plateau resulted in the low total abundance of microfossils and their relatively monotonous taxonomic composition. Benthic foraminifers display almost equal proportions and coexistence of ecologically different groups occurring in the Arctic shelf seas, from shallow inner shelf inhabitants to relatively deep-water ones. Rare ostracods are represented by typical dwellers of the Arctic mid-outer shelf areas. Similar to benthic foraminifers, dinocysts show a mixture of heterotrophic, including cryophilic, and autotrophic forms. The constant presence of freshwater green algae points to river runoff influence. Findings of rare polar and subpolar planktonic foraminifers together with benthic foraminifer species Cassidulina neoteretis allow assuming periodical inflows of subsurface Atlantic-derived water. Altogether, this gives evidence for an Arctic-type marine basin likely corresponding to the early stage of the transgression probably including the local highstand prior to regression. The age assignment of these beds is supported by OSL dates from overlying sandy layers generally ranging between 140 and 87 ka, with possibly older (MIS 7) age in one of the Zimnii Coast sections.

The cross-correlation through the Northern Eurasia enables us to state that the common characteristic of the Last Interglacial (LIG) marine sedimentary succession is its two-unit structure. The lower unit corresponds to the early stage of inundation, the upper indicates the littoral sedimentary setting during the stillstand and regressive stage. The substantial range of available dates from 160 to 80 ka, encompassing the end of the MIS 6 glaciation, its degradation, and part of the MIS 5 stage, precludes precise determination of the duration of the Boreal transgression.

The “gap” in the occurrence of the LIG marine deposits in the northeastern Eurasia along the Laptev and western East Siberian coasts might be related to the formation and existence of the glacioisostatic forebulge at the periphery of the MIS 6 ice sheets in combination with local neotectonic movements.

对库洛伊高原外围6个剖面（Zimnii海岸和Soyana-Kuloi河流域）的基底沉积物单元进行了新的地层、微古生物学和地质年代学（OSL）研究，将其确定为白海东部地区MIS 6 - MIS 5北纬（Eemian）海侵末期。大多数研究的北方海相床由两个单元组成，深灰色的化石粉质粘土覆盖着米色和浅灰色的松散（砂和砾石）各种层状物质。可能由于靠近库洛伊高原，沉积速率高，导致微化石总丰度低，分类组成相对单一。底栖有孔虫在北极陆架海洋中，从浅层陆架居民到相对较深的陆架居民，显示出几乎相同的比例和生态不同群体的共存。罕见的介形类以北极中外陆架地区的典型居民为代表。与底栖有孔虫类似，二囊虫表现出异养的混合，包括嗜冷和自养形式。淡水绿藻的持续存在表明河流径流的影响。罕见的极地和亚极地浮游有孔虫以及底栖有孔虫Cassidulina neoteretis的发现允许假设大西洋地下水的周期性流入。总的来说，这提供了一个北极型海相盆地的证据，可能对应于海侵的早期阶段，可能包括回归之前的局部高地。这些层的年龄分配由上覆砂层的OSL日期支持，通常在140 - 87 ka之间，在Zimnii海岸的一个区段可能更老（MIS 7）。通过欧亚大陆北部的相互对比，我们认为末次间冰期海相沉积演替的共同特征是其双单元结构。下部单元对应早期淹没期，上部单元代表静止期和退潮期的滨海沉积环境。从160 - 80 ka的大量可用日期，包括MIS 6冰期的结束、其退化和MIS 5阶段的一部分，使得无法精确确定北方海侵的持续时间。欧亚大陆东北部沿拉普捷夫海岸和东西伯利亚西部海岸的LIG海相沉积赋存的“缺口”可能与MIS 6冰原外围冰川均衡前隆起的形成和存在以及局部新构造运动有关。

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引用次数: 0

From lapping waters to marshy lands and back: Quaternary environmental dynamics of the North Caspian inferred from the Raigorod site and contemporary regional correlations 从冲刷水到沼泽地再回来：从Raigorod遗址和当代区域相关性推断的北里海第四纪环境动态

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-12-03 DOI: 10.1016/j.quaint.2025.110058

Andrey Zastrozhnov , Guzel Danukalova , Eugenija Osipova , Ravil Kurmanov , Mikhail Golovachev , Vadim Titov , Alexey Tesakov , Eugeniy Zinoviev , Svetlana Trofimova , Dmitry Zastrozhnov

The Caspian Sea underwent a complex series of transgressive and regressive episodes during the Quaternary, with the North Caspian region particularly sensitive to even minor sea-level fluctuations. Outcrops along the Volga River preserve a valuable depositional record of these changes. The Raigorod site, one of the northernmost sections, provides a key stratigraphic archive for reconstructing regional Quaternary environmental changes, but aspects of its stratigraphy, sedimentary architecture, and geochronology have remained uncertain. In this study, using a multi-proxy approach, combining companion borehole data, biolithostratigraphy, geological mapping, and OSL dating, we refined the regional Quaternary framework and clarified several debated regional stratigraphic boundaries. This multidisciplinary approach permitted us to stratify the entire Quaternary interval of the Raigorod site into a series of regional horizons and subhorizons including the Akchagylian, Apsheronian, Tyurkyanian, Bakunian, Khazarian and Khvalynian. Our results show that the Raigorod site evolved from a nearshore setting during the Akchagylian–Apsheronian transgressive phases in the Early Pleistocene to a fluvial regime during the Tyurkyanian regression at the beginning of the Middle Pleistocene. A subsequent Bakunian transgression re-established marine conditions in the study area. The early Khazarian phase is characterized by alternating transgressive and regressive events. Borehole data confirm that Singilian deposits are embedded within the Khazarian sequence, supporting our earlier regional interpretations. The Singilian phase reflects widespread regression and marshland development at the end of the Middle Pleistocene, around MIS 7–6, although OSL dates suggest a younger MIS 5 age. Upper Khazarian deposits reflect stable floodplain conditions driven by local hydrology rather than global climatic forcing. Finally, the overlying Atelian unit, traditionally used as a regional marker, is reinterpreted as periglacial alluvium rather than subaerial loess deposits formed during a major regression, likely associated with MIS 4-3. Our results highlight the value of integrated stratigraphic approaches for regional correlations, while emphasizing limitations in OSL dating in sedimentary settings with complex hydrological and hydrogeological dynamics.

里海在第四纪经历了一系列复杂的海侵和海退事件，北里海地区对即使是很小的海平面波动也特别敏感。伏尔加河沿岸的露头保存了这些变化的宝贵沉积记录。Raigorod遗址是最北端的部分之一，为重建区域第四纪环境变化提供了关键的地层档案，但其地层学，沉积结构和地质年代学方面仍然不确定。在这项研究中，我们使用多代理方法，结合伴随钻孔数据、生物岩石学、地质填图和OSL测年，完善了区域第四纪框架，并澄清了几个有争议的区域地层边界。这种多学科方法使我们能够将Raigorod遗址的整个第四纪区间划分为一系列区域层和亚层，包括Akchagylian， Apsheronian, Tyurkyanian, Bakunian， Khazarian和Khvalynian。结果表明，Raigorod遗址由早更新世akchagyian - apsheronian海侵期的近岸环境演变为中更新世初tyurkyian退行期的河流环境。随后的巴库尼亚海侵恢复了研究地区的海相条件。早期可萨阶段的特点是交替的海侵和退行事件。钻孔数据证实，新加坡的矿床嵌套在可萨层序中，支持了我们之前的区域解释。singlian期反映了中更新世末期（MIS 7-6左右）的大范围退化和沼泽发育，尽管OSL测年表明MIS 5的年龄更小。上可萨矿床反映了由当地水文而非全球气候强迫驱动的稳定洪泛平原条件。最后，上覆的阿特利亚单元，传统上被用作区域标志，被重新解释为冰缘冲积层，而不是在主要回归期间形成的地面黄土沉积物，可能与MIS 4-3有关。我们的研究结果强调了综合地层学方法对区域相关性的价值，同时强调了在具有复杂水文和水文地质动力学的沉积环境中OSL定年的局限性。

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引用次数: 0

Variability and use of laminar products in the late Middle Paleolithic of the Central Balkans 中巴尔干地区旧石器时代中期晚期层流制品的变异性和使用

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-12-02 DOI: 10.1016/j.quaint.2025.110081

Sofija Dragosavac , Anđa Petrović , Bojana Mihailović

The European Middle Paleolithic laminar technologies can be divided into Levallois and non-Levallois blade production. Despite the abundance of detailed publications about the reduction strategies and their differences, only a few discuss the causes of their variability. The paper addresses the variability of laminar technology from the aspect of its use, mobility, and technological organization of Neanderthal communities in the Central Balkans in MIS 3. Results of use-wear analysis of Levallois and non-Levallois laminar products are compared with metrics, frequency, and raw material procurement, as indicators of their potential for carrying and reshaping with an aim to represent the fundamental differences between curated and expedient technological strategies. Integrated results, considered in the wider regional context, contribute to the understanding of laminar variability in the Middle Paleolithic, as the reconstruction of the technological behavior of Neanderthal communities.

欧洲旧石器时代中期的层流技术可分为勒瓦卢瓦和非勒瓦卢瓦叶片生产。尽管有大量关于减少战略及其差异的详细出版物，但只有少数讨论其变异性的原因。本文从层流技术的使用、流动性和尼安德特人社区在MIS 3中部巴尔干地区的技术组织方面解决了层流技术的可变性。将Levallois和非Levallois层流产品的使用磨损分析结果与指标、频率和原材料采购进行比较，作为其承载和重塑潜力的指标，目的是代表策划和权宜技术战略之间的根本差异。综合结果，在更广泛的区域背景下考虑，有助于理解旧石器时代中期的层流变异性，作为尼安德特人社区技术行为的重建。

引用次数: 0

Were the late pleistocene giant sloths from brazilian intertropical region adapted to an aquatic lifestyle? A bone compactness analysis 来自巴西热带地区的晚更新世巨型树懒是否适应了水生生活方式？骨密度分析

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-11-29 DOI: 10.1016/j.quaint.2025.110079

Mário André Trindade Dantas , Thays Oliveira

This study aimed to evaluate the compactness of the ribs and humeri of extinct giant sloth species from the Brazilian Intertropical Region (BIR; Megatheriidae - Nothrotherium maquinense and Eremotherium laurillardi; Megalonychidae - Ahytherium aureum and Australonyx aquae; Scelidotheriidae - Valgipes bucklandi and Catonyx cuvieri; Mylodontidae - Glossotherium phoenesis, Ocnotherium giganteum, and Mylodonopsis ibseni) to assess potential adaptations to an aquatic lifestyle. Bone compactness observed in the ribs (0.453 ± 0.164) and humeri (0.390 ± 0.106) was similar across all studied taxa (t = 0.78, p = 0.44). Members of the Megatheriidae family exhibited the highest values (rib = 0.637 ± 0.103; humeri 0.437 ± 0.107), followed by members of the Scelidotheriidae (ribs = 0.383 ± 0.054; humerus = 0.369), Mylodontidae (ribs = 0.383 ± 0.054; humerus = 0.369), and Megalonychidae (ribs = 0.325 ± 0.080) families. The bone compactness observed in the ribs and humeri of the extinct giant sloths of the Late Pleistocene of the BIR was below the values observed in terrestrial mammals and Thalassocnus spp. (>0.850), the unique giant sloth taxa adapted to aquatic lifestyles, suggesting that none of the BIR taxa were adapted to an aquatic lifestyle.

本研究旨在评估巴西热带地区已灭绝的巨型树懒物种（大懒科- Nothrotherium maquinense和Eremotherium laurillardi，大懒科- Ahytherium aureum和Australonyx aquae，大懒科- Valgipes bucklandi和Catonyx cuvieri， Mylodontidae - Glossotherium phoenesis， Ocnotherium giganteum和Mylodonopsis ibseni）肋骨和肱骨的密实度，以评估其对水生生活方式的潜在适应性。在所有研究分类群中，肋骨（0.453±0.164）和肱骨（0.390±0.106）的骨密实度相似（t = 0.78, p = 0.44）。大蝇科（肋骨= 0.637±0.103，肱骨= 0.437±0.107）值最高，其次是棘蝇科（肋骨= 0.383±0.054，肱骨= 0.369）、齿齿科（肋骨= 0.383±0.054，肱骨= 0.369）和巨爪蝇科（肋骨= 0.325±0.080）。BIR晚更新世已灭绝的巨型树懒肋骨和肱骨的骨密实度低于陆生哺乳动物和适应水生生活方式的独特巨型树懒类群Thalassocnus spp. (>0.850)，表明BIR所有类群都不适应水生生活方式。

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引用次数: 0

Early human settlement in the inter-Andean Magdalena valley, Colombia: New technological and chronological insights from the Nare site 哥伦比亚安第斯山脉间马格达莱纳山谷的早期人类定居点：来自Nare遗址的新技术和年代见解

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-11-28 DOI: 10.1016/j.quaint.2025.110051

Brunella Muttillo , Giuseppe Lembo , Sahra Talamo , Laura Tassoni , Simona Arrighi , Clarissa Dominici , Chiaramaria Stani , Martha Cecilia Cano , Carlos López

The Magdalena valley, Colombia's principal fluvial corridor, has long been recognized as a key route for early human dispersal in northern South America. This inter-Andean region served as a strategic passage between the Andean highlands and the tropical lowlands, offering a resource-rich environment that supported human mobility and settlement since the Pleistocene-Holocene transition.

In the Middle Magdalena valley, some of Colombia's oldest preceramic open-air sites have been identified. However, despite their importance, the technological characteristics of their lithic assemblages—the only direct evidence of early human activity—remain poorly understood.

This study presents the first systematic techno-economic analysis of the preceramic stratigraphic unit at the Nare site, integrating use-wear and residue analyses. Moreover, new radiocarbon dates refine the site's chronological framework, placing its main occupation in the Early Holocene.

The lithic assemblage shows a strong reliance on local raw materials (primarily quartz and chert), a predominance of unretouched flakes, some retouch flakes, and a single unifacial tool. A bladelet core suggests an interest in producing elongated, relatively standardized flakes, though the absence of bladelets raises questions about off-site transport or differential site use.

These results refine our understanding of lithic technology in the region and offer a new perspective on the Middle Magdalena's early industries, highlighting a more diverse and flexible technological repertoire. The Nare assemblage demonstrates a wide range of knapping methods, percussion techniques, and raw material management strategies.

This study enhances our understanding of early human adaptation in the region and contributes to broader discussions on lithic technologies and settlement dynamics in northern South America.

马格达莱纳山谷是哥伦比亚的主要河流走廊，长期以来一直被认为是早期人类在南美洲北部扩散的关键路线。这个跨安第斯地区是安第斯高原和热带低地之间的战略通道，提供了一个资源丰富的环境，支持了更新世-全新世过渡时期的人类流动和定居。在马格达莱纳山谷中部，已经发现了哥伦比亚最古老的露天史前遗址。然而，尽管它们很重要，但它们的石器组合的技术特征——早期人类活动的唯一直接证据——仍然知之甚少。本研究首次对Nare遗址的前陶瓷地层单元进行了系统的技术经济分析，结合了使用磨损和残留分析。此外，新的放射性碳定年法完善了遗址的年代框架，将其主要活动时间定位在全新世早期。岩石组合显示出对当地原材料（主要是石英和燧石）的强烈依赖，未修饰的薄片占主导地位，一些修饰的薄片和单一的单面工具。叶片核心表明对生产细长的、相对标准化的薄片感兴趣，尽管缺乏叶片提出了关于异地运输或不同地点使用的问题。这些结果完善了我们对该地区岩石技术的理解，并为中Magdalena的早期工业提供了新的视角，突出了更多样化和灵活的技术。Nare组合展示了广泛的敲击方法，敲击技术和原材料管理策略。这项研究增强了我们对该地区早期人类适应的理解，并有助于更广泛地讨论南美洲北部的石器技术和定居动态。

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引用次数: 0

Glacial changes in the eastern Kunlun Mountains since the Little Ice Age 小冰期以来东昆仑山脉的冰川变化

IF 1.8 3区地球科学 Q3 GEOGRAPHY, PHYSICAL

Quaternary International

Pub Date : 2025-11-28 DOI: 10.1016/j.quaint.2025.110053

Sai Lin , Jinhua Liu , Yingkui Li , Haiping Hu , Changsheng Ye , Qiang Liu , Shunzi Pi

As one of the most important glaciated areas on the Tibetan Plateau (TP), the Kunlun Mountains (KM) are of great significance in maintaining the ecological balance and sustainable socio-economic development of the arid regions in Central Asia. We reconstructed the glacier extent, ice thickness, and equilibrium-line altitude (ELA) in the eastern section of the Kunlun Mountains (EKM) since the Little Ice Age (LIA) using high-resolution satellite imagery in Google Earth and the PalaeoIce model. The mapped LIA outlines were validated with field observations. We then analyzed the changes in glacier area, ice thickness, volume, and ELA since the LIA. The results showed that, since the LIA, the glacier area in EKM has decreased by about 15 %, the ice volume has lost about 25.2 %, and the ELA has risen by 28 m. The glacier change was spatially heterogeneous in the EKM, in which the retreat of glacier area and volume in the eastern region was greater than those in the central and western regions. Glacier changes in the western region also showed a north-south heterogeneity, with smaller changes in the southwestern part and greater changes in the northwestern part. These changes were closely related to the characteristics of regional glaciers. The glaciers of EKM had relatively smaller changes in response to temperature rise compared with other glaciers on the TP.

利用谷歌地球和古冰模型，重建了小冰期（LIA）以来昆仑山东段的冰川范围、冰厚和平衡线高度（ELA）。通过实地观测验证了绘制的LIA轮廓。分析了冰期以来冰川面积、冰厚、体积和ELA的变化。结果表明，自冰期以来，EKM冰川面积减少约15%，冰量减少约25.2%，ELA上升约28 m。冰川变化具有空间异质性，东部地区冰川面积和体积的退缩大于中部和西部地区。西部地区冰川变化也呈现南北异质性，西南变化较小，西北变化较大。这些变化与区域冰川特征密切相关。与TP上的其他冰川相比，EKM冰川对气温升高的响应相对较小。

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引用次数: 0

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