Palaeogeography, Palaeoclimatology, Palaeoecology最新文献

{"title":"New insights into the Neogene sedimentary Formations of south-western India: Implications for provenance, palaeovegetation and depositional environment","authors":"K.V. Sarath ,&nbsp;K. Sandeep ,&nbsp;Alka Absur ,&nbsp;Namitha Ajay ,&nbsp;Poonam Verma ,&nbsp;Yogesh P. Singh ,&nbsp;A.K. Rafaz ,&nbsp;V. Nandakumar ,&nbsp;G. Indu ,&nbsp;E. Shaji","doi":"10.1016/j.palaeo.2025.113499","DOIUrl":"10.1016/j.palaeo.2025.113499","url":null,"abstract":"<div><div>The Warkalli Formation represents a key Neogene sedimentary archive along the south-western coast of India. This study examines the northern extension of the Formation exposed around Cheruvathur village, Kerala, integrating sedimentological, geochemical, and palynological data to reconstruct provenance, weathering conditions, palaeovegetation, and depositional environment. The succession is composed of arenaceous–argillaceous sediments capped by laterite and is classified into four facies associations: floodplain, active channel, lagoonal/lacustrine, and dune–beach transition facies, indicating major shifts in fluvial dynamics and changes in the coastline. Extremely high values of Chemical Index of Alteration and Fe-Al enrichment suggest intense tropical chemical weathering and derivation from nearby felsic to intermediate basement rocks, with minor mafic contributions. Pollen spectra dominated by pteridophyte spores and angiosperm pollen, along with fungal remains, indicate warm and humid climatic conditions with freshwater to coastal vegetation and episodic tidal influence. These observations collectively imply strong monsoonal forcing, short sediment transport, and fluctuating sea levels during the Mio-Pliocene. The study provides new insights into Neogene palaeoenvironmental evolution along the passive western margin of India and highlights the climatic sensitivity of tropical coastal depositional systems.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113499"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842085","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-paleoclimatic proxies implicate climate shift from arid-to-humid in the Northeastern Arabian Sea teleconnected to ENSO events","authors":"Sruthy Rose Baby ,&nbsp;Mohan Kuppusamy ,&nbsp;Busnur R Manjunatha ,&nbsp;Jithin Jose ,&nbsp;Pankaj Kumar ,&nbsp;Saravanan Kothandaraman ,&nbsp;Ravi Mishra","doi":"10.1016/j.palaeo.2025.113463","DOIUrl":"10.1016/j.palaeo.2025.113463","url":null,"abstract":"<div><div>The Arabian Sea sediments have the records of significant temporal and spatial variations in response to the neotectonic changes, paleoclimatic and paleo-sea level fluctuations particularly from the Quaternary period. In this study area, environmental mineral magnetic parameters, diffuse reflectance spectroscopy (DRS), XRF (Fe/K, Ti/Al and Ca %) have been studied in an AMS radiocarbon dated core- SK240/473 from the coast off Saurashtra, south-western part of Gujarat State, north-western continental margin of India, to unravel paleoclimatic and paleoceanographic sedimentation and sea level changes over the past 15 ka BP. Currently, the rainfall of this region mainly occurs during the summer monsoon season. Based on results of multi-proxies measured in this core indicate that three major changes in the climate: phase- I before the Holocene thermal maximum (HTM), phase- II during the HTM, and phase- III after the HTM. The phase-I is mainly characterized by abundance of hematite over goethite with high carbonate content, but lower in total organic carbon (TOC) and chemical weathering index (CWI) suggesting arid climate of oxidizing environment of sediment deposition during the rapid sea level rise from 14.5 ka BP to 12.0 ka BP with a standstill sea level from 12 ka BP - 10 ka BP. In contrast, the phase-II marked by a transition from arid to humid condition of sediment deposition characterized by higher CWI, abundant TOC and goethite, but lower in hematite and carbonate concentrations reflecting humid climate of reducing environment of sediment deposition during the Holocene thermal maximum (HTM) from 10.00 ka BP to 5.50 ka BP. Interpretations made here are generally in good agreement with the deglacial to Holocene Sea level fluctuations curve proposed for the west coast of India. In Phase III, the χlf, χfd, and Chemical Index of Alteration (CIA) data from sediments deposited after the HTM largely suggest deposition in a humid environment, occasionally interrupted by arid episodes in the study region's hinterland. Such arid events linked to paleo-El Niño episodes recorded in the tropical eastern Pacific Ocean. This interpretation is further supported by the reason explained to the current rainfall variability in the hinterland of the study area. Overall, the data of the core studied reveal significant environmental, sea-level and monsoonal changes in the NE Arabian Sea since the deglacial period. The goethite/hematite (G/H) ratio, χlf and χfd profiles which is an indicator of humidity/aridity and coastal upwelling are different from the sea-level curve, suggesting that formers are better indicator of monsoon intensity that often regulated by the ENSO.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113463"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145799353","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Coupled tectonic-climatic-oceanographic dynamics drove the evolution of foraminiferal diversity in South China during the Middle to Late Mississippian","authors":"Chao Liu ,&nbsp;Junjun Qi ,&nbsp;Pedro Cózar ,&nbsp;Ismael Coronado ,&nbsp;Fei Li ,&nbsp;Weiqing Liu ,&nbsp;Meng Li ,&nbsp;Ping Wang ,&nbsp;Xin Li ,&nbsp;Xia Hu ,&nbsp;Song Jin","doi":"10.1016/j.palaeo.2025.113528","DOIUrl":"10.1016/j.palaeo.2025.113528","url":null,"abstract":"<div><div>Understanding the interactions between biological evolution and other components of the Earth system, particularly tectonic, climatic, and environmental changes, has long been a central focus in Earth sciences. In this study, we present the first high-resolution foraminiferal species diversity curve spanning the late Visean to Serpukhovian from the Youjiang Basin of South China, integrated with multiple geochemical datasets, to elucidate the factors influencing foraminiferal diversification through robust correlations among sedimentological, biological, and geochemical records at a global scale. The widespread biodiversity crisis during the early late Visean (Aleksinian–Mikhailovian transition) is interpreted to have resulted from global oceanic bottom-water anoxia, coinciding with intensified continental silicate weathering and the onset of a major phase of Gondwanan glaciation. The uplift of the Hercynian orogenic belt, exposure of mantle-derived rocks at low latitudes, and the expansion of vascular plants during this interval are considered the primary driving mechanisms. Enhanced nutrients delivery to the oceans via terrestrial input elevated primary marine productivity and accelerated organic carbon export and burial, leading to excessive consumption of dissolved oxygen and other oxidants during organic matter degradation. Global foraminiferal radiation from the early late Visean to the earliest Serpukhovian is attributed to elevated dissolved oxygen concentrations and sufficient food availability, coupled with persistent carbonate supersaturation in contemporaneous upper ocean waters. The widespread loss of shallow shelf habitats, driven by the progression of the Hercynian orogeny and enhanced continental ice accumulation on Gondwana continent during the early to latest Serpukhovian, probably contributed to the observed foraminiferal diversity decline during this period. This study sheds new light on the interactions among various Earth systems during a period characterized by profound transformations in global paleogeography, climate, and oceanographic conditions.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113528"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842088","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Deciphering Holocene monsoon dynamics in northeastern India using speleothem δ18O record and petrography","authors":"Yachna Verma ,&nbsp;Anil K. Gupta ,&nbsp;Prasanta Sanyal ,&nbsp;Priyantan Gupta ,&nbsp;Som Dutt ,&nbsp;Pankaj Kumar ,&nbsp;Abhijit Mukherjee","doi":"10.1016/j.palaeo.2025.113518","DOIUrl":"10.1016/j.palaeo.2025.113518","url":null,"abstract":"<div><div>A high-resolution stalagmite δ¹⁸O record from Mawsmai Cave (MAW), spanning from ∼11,807 to 5622 calibrated years before present (cal yr BP), sheds light on the dynamics of the Indian Summer Monsoon (ISM). In the early Holocene (∼ 11,807–7700 cal yr BP) the decreased δ¹⁸O values suggest a period of intensified ISM, whereas in the middle Holocene (∼ 7700–5622 cal yr BP) the positive δ¹⁸O values demonstrate a weak ISM. Petrographic and mineralogical analyses suggest a correspondence between changes in stalagmite fabric and δ¹⁸O variability, implying a climatic control on stalagmite growth. The MAW record also depicts several multi-centennial scale ISM shifts that coincide with the Bond events 8, 7, 6, 5b, 5a, and 4, suggesting teleconnections between North Atlantic climate and ISM variability via changes in the Atlantic Meridional Overturning Circulation (AMOC). Spectral and continuous wavelet transform analyses of the MAW record reveal periodicities of ∼118 and ∼ 110 years, consistent with the centennial-scale Gleissberg solar cycles. These cyclicities indicate that solar variability in conjunction with coupled ocean–atmosphere dynamics, including the Pacific Decadal Oscillation (PDO) and the temperature gradient between the Tibetan Plateau and the Indian Ocean, played a dominant role in modulating ISM variability during the early to middle Holocene.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113518"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842086","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"How volcanoes affect boreal mires: Climate-driven regional vegetation changes and stage-dependent responses to tephra fallout in Kamchatka during the Late Holocene","authors":"Valerii E. Pimenov ,&nbsp;Maria M. Pevzner ,&nbsp;Natalia G. Mazei ,&nbsp;Andrey N. Tsyganov ,&nbsp;Ekaterina G. Ershova ,&nbsp;Yuri A. Mazei","doi":"10.1016/j.palaeo.2025.113501","DOIUrl":"10.1016/j.palaeo.2025.113501","url":null,"abstract":"<div><div>Studying vegetation dynamics in the regions with high volcanic activity is crucial for understanding ecosystem responses to environmental disturbances and predicting future ecological changes. However, the impacts of tephra deposition on vegetation at local and regional scales remain poorly quantified, limiting understanding of ecosystem resilience to volcanic disturbances. This study presents a high-resolution, multiproxy palaeobotanical record from the Kumroch peatland (Kamchatka, Eurasian Far East), integrating detailed tephrostratigraphy, radiocarbon ages, pollen, plant macrofossil, and loss on ignition data. The peat sequence spans the last ∼5 kyr, anchored by 28 recorded tephra layers. Birch forests (<em>Betula ermanii</em>) and alder shrublands (<em>Alnus alnobetula</em> subsp. <em>fruticosa</em>) dominated during the Middle and Late Holocene, with their proportions shifting in response to climate variations. These changes align in timing with the Late Holocene climate oscillations, primarily reflecting temperature fluctuations. Tephra fallout events had no persistent impact on regional vegetation and limited effects on the local vegetation. These findings demonstrate the resilience of boreal ecosystems to tephra deposition across volcanically active areas and underscore the importance of large-scale studies for understanding ashfall-related disturbances.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113501"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145799342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Carbonate-associated sulfate isotope signatures in marine mollusk shells","authors":"Shanggui Gong ,&nbsp;Yongbo Peng ,&nbsp;Laurie C. Anderson ,&nbsp;Annette Summers Engel ,&nbsp;Huiming Bao","doi":"10.1016/j.palaeo.2025.113503","DOIUrl":"10.1016/j.palaeo.2025.113503","url":null,"abstract":"<div><div>The oxygen and sulfur isotope compositions of carbonate-associated sulfate (CAS) in biogenic materials, such as mollusk shells, are valuable for inferring paleo-seawater sulfate isotope signatures. However, infaunal species may incorporate sulfate from sediment porewater or, in chemosymbiotic taxa, sulfate metabolized by endosymbiotic sulfur-oxidizing bacteria. To evaluate whether shell CAS primarily records seawater or an ecological niche signature, we measured the δ³⁴S and δ¹⁸O of CAS from 24 modern and Holocene mollusk species spanning epifaunal, shallow infaunal, deep infaunal, and lucinid (chemosymbiotic) habitats across the northeastern Gulf of Mexico, Bahamas and Mexico. Results show substantial isotopic variability (δ³⁴S_CAS: 15.1–22.6 ‰; δ¹⁸O_CAS: 8.5–14.3 ‰): 1) Epifaunal and lucinid δ³⁴S_CAS values cluster near seawater values, while shallow infauna exhibits the greatest variability (up to 7.5 ‰ range), and deep infauna consistently show lower δ³⁴S_CAS (17.1–19.9 ‰) than seawater. 2) All taxa exhibit δ¹⁸O_CAS enrichment above seawater. The absence of ³⁴S-enrichment in infauna suggests limited porewater sulfate incorporation. Epifaunal δ³⁴S_CAS values span a 2.6 ‰ range, with a minimum of 19.5 ‰, implying contributions from non-seawater sulfate, likely dietary sulfur or intracrystalline organic sulfate. Reduced δ³⁴S_CAS in deep infauna also supports these additional sulfate sources incorporation, as deep infauna increased reliance on deposit-feeding of deeper sediment organic matter characterized by decreasing δ³⁴S value. For shallow infauna, their larger variability in δ³⁴S_CAS stems from diverse feeding strategies (filter- and deposit-feeding) and niche adaptations. Bulk CAS of shallow-water lucinid species archive limited ³⁴S-depeted signal of endosymbiont-derived sulfate. CAS oxygen isotope is consistently enriched due to vital effects, with highly variable δ¹⁸O_CAS value across all niches supporting multiple sulfate sources in shells. These findings demonstrate that mollusk shell CAS does not purely record seawater sulfate but incorporates ecological signatures, underscoring the importance of species-specific biology in CAS-based paleoenvironmental or symbiosis studies.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113503"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145799355","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Paleobiogeography of early to middle Paleozoic phytoplankton: A review and synthesis","authors":"Eiver Gelan Manzano ,&nbsp;Claude Monnet ,&nbsp;David M. Kroeck ,&nbsp;Stewart Molyneux ,&nbsp;Hendrik Nowak ,&nbsp;Paulina Nätscher ,&nbsp;Thomas Servais","doi":"10.1016/j.palaeo.2025.113412","DOIUrl":"10.1016/j.palaeo.2025.113412","url":null,"abstract":"<div><div>Phytoplankton form the foundation of marine food webs, and their fossil record provides key insights into ecosystem and climate evolution. We review the biogeography of Paleozoic phytoplankton based on data from the literature and new multivariate analyses of acritarch data that are georeferenced to paleolatitude and paleolongitude. Results show that acritarchs are rather cosmopolitan with wide geographic ranges, their distribution often differentiated into two broad latitudinal realms: a northern warm-water and a southern cold-water assemblage. Provincialism was most pronounced during the Ordovician and Devonian. The Ordovician provincial structure collapsed during the Hirnantian glaciation, resulting in a short-lived cosmopolitan phase that persisted into the early Silurian. Biogeographic differentiation re-emerged in the middle Silurian and was reorganized in the Devonian as plate movements closed ocean basins and enabled new intercontinental exchanges. Overall, climate change and plate tectonics appear to be the primary drivers of phytoplankton provincialism.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113412"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145799356","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Taiwan's land-vertebrate suite: An assemblage forged by tectonism and sea-level shifts","authors":"Jason R. Ali ,&nbsp;Uwe Fritz","doi":"10.1016/j.palaeo.2025.113502","DOIUrl":"10.1016/j.palaeo.2025.113502","url":null,"abstract":"<div><div>Like many islands in continental-shelf settings, Taiwan has a rich land-vertebrate suite comprising mainly nonendemic taxa. Unusually, though, it also hosts a substantial fraction of endemic species, some the result of in situ diversification. Here, we disentangle the physical processes that have shaped the island's assemblage and document the roles they played. Taiwan is a high-elevation landmass on the edge of China's continental shelf, its emergence resulting from the ongoing collision between the Eurasian and Philippine Sea Plates, which started <em>c</em>. 5 Mya. For the first <em>c</em>. 4 Myr of the island's history colonizations involved over-water dispersal, hence relatively few establishment events. Significantly, the sizeable ecospace the incomers entered hosted a variety of niches (notably, greater than those in the areas they crossed from), and this spurred anagenesis and occasionally cladogenesis. Although the Pleistocene sea-level falls (starting <em>c</em>. 2.6 Mya) modified greatly and frequently the regional geography, only those occurring after 900 kya were sufficiently large (i.e., below −72/−75 m) to open up a succession of landbridges across the Taiwan Strait seabed to mainland Asia. Significantly, such episodes allowed taxa to enter Taiwan unimpeded, thereby accounting for the bulk of its lineages, most of which are nonendemic.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113502"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145885191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Late Miocene tectonic reorganization and regional development of thrust faulting in the northeastern Tibetan Plateau","authors":"Hao Xie ,&nbsp;Caicai Liu ,&nbsp;Dewen Zheng ,&nbsp;Ying Wang ,&nbsp;Jingxing Yu ,&nbsp;Xudong Zhao ,&nbsp;Zhuqi Zhang ,&nbsp;Li Deng ,&nbsp;Jiawei Zhang ,&nbsp;Huiping Zhang","doi":"10.1016/j.palaeo.2025.113522","DOIUrl":"10.1016/j.palaeo.2025.113522","url":null,"abstract":"<div><div>Constraining the initiation of intracontinental thrust faults is crucial for understanding deformation sequences that occurred during the growth of the Tibetan Plateau. This study investigates the activation timing of the nearly E–W-trending Qinghainan Shan and Gonghenan Shan thrust faults through integrated provenance analyses of Cenozoic sediments from the Chaka–Gonghe Basin, including sandstone petrography, heavy mineral assemblages, and detrital zircon U-Pb geochronology. Results reveal a pronounced provenance shift at ∼6–7 Ma, marked by a sharp increase in sediment derived from the adjacent Qinghainan Shan and Gonghenan Shan. This transition coincides with a decline in mineral maturity indices along with a change in the rotational trend, reflecting mountain uplift and constraining the initiation of these thrust faults to the late Miocene. Regionally, deformation propagated sequentially from WNW-trending strike-slip boundary faults to NNW-trending dextral strike-slip fault systems, and subsequently to intrablock thrusts. The late Miocene onset of these thrust faults represents a key kinematic step in strain partitioning, accommodating crustal shortening during the India–Asia convergence and facilitating the northeastward growth of the plateau. This progression from boundary faulting to distributed interior deformation supports a model of continuous, rather than rigid-block tectonic deformation during continental convergence.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113522"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145842089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Sedimentary facies and invertebrate faunal exchange confirm humid conditions in the tropical eastern Atlantic during interglacial Marine Isotopic Stage (MIS) 11c","authors":"Carlos S. Melo ,&nbsp;José Madeira ,&nbsp;Ricardo S. Ramalho ,&nbsp;Ana C. Rebelo ,&nbsp;Michael W. Rasser ,&nbsp;Esther Martín-González ,&nbsp;Alfred Uchman ,&nbsp;Carlos Marques da Silva ,&nbsp;Emílio Rolán ,&nbsp;Luís Silva ,&nbsp;Joseph A. Stewart ,&nbsp;Laura F. Robinson ,&nbsp;Deirdre D. Ryan ,&nbsp;Alessio Rovere ,&nbsp;Antje Voelker ,&nbsp;Patrícia Madeira ,&nbsp;Mário Cachão ,&nbsp;Sérgio P. Ávila","doi":"10.1016/j.palaeo.2025.113505","DOIUrl":"10.1016/j.palaeo.2025.113505","url":null,"abstract":"<div><div>The geological study of Marine Isotopic Stage (MIS) 11c (424–397 ka) is key to reconstructing the climatic and oceanographic conditions during one of the longest and the warmest interglacial in the last 1 million years. Moreover, interglacial MIS 11c is considered as an important analogue for our near future in times of climate change, under anthropogenic emissions scenarios, due to its similar orbital forcing configuration. Here we present the results of a comprehensive analysis of one of the most extensive Quaternary fossiliferous sedimentary successions in the Cabo Verde archipelago in the tropical northeastern Atlantic. The Nossa Senhora da Luz Bay (Santiago Island) is one of the few MIS 11 fossiliferous sites known in Macaronesia. The sedimentary succession records a set of transitions between fluvial and marine environments, and emersion and immersion events within a confined, highly protected bay environment. A thick layer of fine-branched rhodoliths in its upper part suggests ecological conditions that no longer exist in Cabo Verde. The presence of specimens of the intertidal clam <em>Senilia senilis</em> in life position ∼12 m above present-day mean sea level leads us to reinterpret the relative sea-level changes at Santiago Island and show that the uplift trend since MIS 11c is an order of magnitude lower (0.01 mm/yr) than previously calculated (0.10 to 0.14 mm/yr). The fossil assemblage includes representatives of five phyla, with molluscs being the most diverse and abundant. Despite the abundance of some bivalves (<em>Saccostrea cuccullata</em>, <em>S. senilis</em>, and <em>Aequipecten opercularis</em>), and gastropods (<em>Thetystrombus latus</em> and <em>Thais nodosa</em>), and some horizons showing the crustacean burrows <em>Thalassinoides suevicus</em>, the general biodiversity is low. The presence of <em>S. cuccullata</em> and <em>S. senilis</em>, both absent from present-day Cabo Verde archipelago, indicates a tropical, more humid climate in this region, during MIS 11c.</div></div>","PeriodicalId":19928,"journal":{"name":"Palaeogeography, Palaeoclimatology, Palaeoecology","volume":"684 ","pages":"Article 113505"},"PeriodicalIF":2.7,"publicationDate":"2026-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145885192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}