Geomorphology最新文献

{"title":"Quaternary fluvial archives from Asian rivers: Reflections of tectonic activity, crustal processes and climatic variation","authors":"David Bridgland ,&nbsp;Zhenbo Hu ,&nbsp;Zijuan Dong ,&nbsp;Xiaohua Li ,&nbsp;Yiorgos Galanis ,&nbsp;Chris Orton","doi":"10.1016/j.geomorph.2025.109841","DOIUrl":"10.1016/j.geomorph.2025.109841","url":null,"abstract":"<div><div>This paper reviews the fluvial archives from selected Asian rivers, exploring the extent to which they inform about the influences upon fluvial evolution of tectonic activity, crustal processes and patterns of climatic change. The drainage systems selected for review include examples of different size and in different parts of the continent, the criterion for selection being recent research undertaken on them that has provided updated data on their fluvial archives. Patterns revealed include a strong record of uplift from SW Asia: Anatolia, the Levant and Mesopotamia; in the last two of these regions the fluvial archives incorporate important evidence for early human occupation. Rivers flowing over cratonic crust across Siberia to the Arctic Ocean lack evidence for progressive uplift but can still reveal long-timescale fluvial archives; they can also represent important contexts for regional archaeological records, as well as for palaeontology. The largest Asian rivers include those draining from the Himalayan–Tibetan uplands, where the drainage has evolved alongside the World's most extreme recent orogenesis. They record complex reorganization of drainage, including the diversion of the Yarlung Tsangpo from the Irrawaddy to the Brahmaputra and of the Yangtze from the Red River. The Yellow River, meanwhile, has been formed from the progressive capture of formerly endorheic basins on the Tibetan Plateau, while drainage at the northern edge of the Tibetan Plateau has evolved in response to recently uplifted mountain chains. The selected examples provide insight into the interaction of tectonic, epeirogenic and climatic influences on fluvial evolution and associated palaeoenvironments.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"484 ","pages":"Article 109841"},"PeriodicalIF":3.1,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144124524","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":"Transition of predominant regional tectonics to global climate forcing for Asian summer monsoons at ~7.2 Ma","authors":"Peng Gao ,&nbsp;Xiaoxue Wang ,&nbsp;Haoqi Chen ,&nbsp;Yixin Chen ,&nbsp;Yifan Hua ,&nbsp;Junsheng Nie","doi":"10.1016/j.geomorph.2025.109840","DOIUrl":"10.1016/j.geomorph.2025.109840","url":null,"abstract":"<div><div>Much has been known regarding late Neogene East Asian summer monsoon (EASM) history and potential forcing mechanisms due to the existence of late Neogene loess deposits on the Chinese Loess Plateau. No continuous loess deposits exist in South Asian monsoon region, and many studies infer South Asian summer monsoon (SASM) variations mainly from low-elevation marine or fluvio-lacustrine sediments. However, inconsistent viewpoints emerge regarding the evolution of the SASM from the late Miocene to the Pleistocene and the potential forcing mechanisms based on these sediments. Here we present an SASM record derived from environmental magnetic parameter in late Neogene fluvio-lacustrine strata from the high-elevation Zhada Basin in southern Tibet. The results show the SASM experienced four stages of variations over the late Miocene to the early Pleistocene, with stronger monsoon precipitation corresponding to warmer climate after ~7.2 Ma. However, SASM intensification prior to ~7.2 Ma was contrary to effects of global climate variations, which we attributed to thermal and mechanical effects of the northeastward growth of the Tibetan Plateau on the SASM. A comparison with the EASM records suggests that the EASM also experienced a transition of dominant driving forcing from the Tibetan Plateau uplift to global climate at ~7.2 Ma, with the exception of the interval 4.5–2.7 Ma when the EASM intensification was controlled by regional tectonics (possibly closure of the Panama Seaway). This study clarifies evolution history of the Asian summer monsoons and recognizes their main forcing mechanisms since 10 Ma.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"484 ","pages":"Article 109840"},"PeriodicalIF":3.1,"publicationDate":"2025-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144088912","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":"Differential exhumation of the Motuo, Namche Barwa Syntaxis: Implications for the evolution of the Yarlung Tsangpo River","authors":"Feng Liu ,&nbsp;Yue Zhao ,&nbsp;Junling Pei","doi":"10.1016/j.geomorph.2025.109842","DOIUrl":"10.1016/j.geomorph.2025.109842","url":null,"abstract":"<div><div>A break in the spatial pattern of bedrock cooling ages, derived from low-temperature thermochronology data, is evident across the western and northern boundaries of the Namche Barwa Syntaxis (EBS) since the Pliocene. This break has been interpreted as evidence of the growth of the EBS, which has driven the evolution of the Yarlung Tsangpo River in the syntaxis region. However, the Pliocene cooling and exhumation history of the eastern boundary, as defined by an eastward-bulged curvilinear mylonitic shear zone and strike-slip faults, is still unclear due to sparse low temperature thermochronology data. In this study, 12 bedrock apatite fission-track (AFT) samples were collected in the Motuo area of Tibet. Most of these samples yielded cooling ages ranging from 4.65 to 2.62 Ma. These ages are older than the existing data (1.7–2.4 Ma) that were confined within the EBS, from Beibeng to Duoxiong-La. Comprehensive tectonic analysis and thermal history modeling reveals that 1) the AFT cooling age-break exists across the eastern boundary of the EBS; 2) this break reflects the differential rock exhumation that occurred in this area after the Pliocene, which was most likely accommodated by the activity of the Aniqiao-Motuo shear zone and regional NE-SW compression ranging from Beibeng to Duoxiong-La. In this tectonic context, variations in precipitation may play only a secondary role in modulating the exhumation of the Motuo area. Based on the regional exhumation history, we infer that the peak period during which the Yarlung Tsangpo River followed its present course through the EBS may have occurred after 2 Ma.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"485 ","pages":"Article 109842"},"PeriodicalIF":3.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144196294","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":"Aeolian sediment transport over a granule ripple surface and its implications for geomorphological evolution","authors":"Guangqiang QIAN ,&nbsp;Zhuanling YANG ,&nbsp;Xuegang XING ,&nbsp;Zhibao DONG ,&nbsp;Youyuan Guo","doi":"10.1016/j.geomorph.2025.109839","DOIUrl":"10.1016/j.geomorph.2025.109839","url":null,"abstract":"<div><div>Aeolian sediment transport causes a range of sand hazards and serious air pollution, but also sculpts intricate landscapes in arid and semi-arid areas. Previous studies of aeolian transport have mainly focused on the particle transport rate or flux density above various surfaces, such as sandy and gravelly beds, or have linked these factors to the dynamic processes that govern fine-grained bedforms, including dunes and sand ripples. Granule ripples have been studied less. Their sediments exhibit a bimodal size distribution, and they are armored by coarse grains at the crest. The aeolian transport characteristics above their surface are crucial for understanding their morphodynamic processes, but have been rarely studied in the field. To provide this missing data, we conducted six observations using a blowing-sediment trap on the surface of granule ripples in the northern part of China's Kumtagh Desert to elucidate the geomorphological effects of aeolian transport. The flux density decreased exponentially with increasing height, but with substantial differences in the vertical profiles of flux density for different grain-size groups. The transported particles were predominantly fine to medium sands, although coarse sands to very fine gravels also underwent saltation at high wind speeds. Wind strength significantly influenced the aeolian transport process, with particles of different sizes responding to different threshold velocities and engaging in different transport modes. We related selective, bimodal, and unimodal transport processes to the morphological evolution of granule ripples and the formation of their sedimentary structure. We suggest that the saltation of coarse particles should be fully considered to refine the theoretical framework for granule ripple evolution.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"484 ","pages":"Article 109839"},"PeriodicalIF":3.1,"publicationDate":"2025-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144088876","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":"Mineralogical investigation of modern sediments and source analysis of different grain-size fractions in the middle and lower Yellow River","authors":"Dianbao Chen ,&nbsp;Wei Liu ,&nbsp;Hongli Pang ,&nbsp;Xiangnan Fu ,&nbsp;Donghong Hu ,&nbsp;Ke Wang ,&nbsp;Dexuan Chen ,&nbsp;Duo Huang ,&nbsp;Baotian Pan ,&nbsp;Eduardo Garzanti","doi":"10.1016/j.geomorph.2025.109824","DOIUrl":"10.1016/j.geomorph.2025.109824","url":null,"abstract":"<div><div>The Yellow River has the highest suspended sediment load among the Earth's big rivers. High sediment supply and rapid sediment accumulation caused numerous flood disasters such as channel breaches and diversions through history. Understanding sediment characteristics and relative contributions from potential source areas is important for recognizing the formation of hyperconcentrated flows and implementing water and sediment regulation projects. We here combine mineral analyses (clay minerals and heavy minerals) of 52 samples of modern riverbed sediments from the middle and lower reaches of the Yellow River and its tributaries, the Haihe River Basin, and the Huaihe River Basin to explore sediment-transport processes in the Huang-Huai-Hai Plain. Frequency models are used to calculate the relative contributions of each potential source area to the sediments of different grain-size in the lower Yellow River. Our results show that clay-sized sediments originate mainly from the Weihe Basin and the southern Loess Plateau, whereas coarser sediments (&gt; 30 μm) are primarily supplied by the Jinshaan Gorge (the mainstream) and its western tributaries. This study underscores the heterogeneity of sediment sources of sediments with different grain-size in the lower Yellow River. It will shed new light on further research on the mechanisms of the formation of hyperconcentrated flows. Our findings contribute to the formulation of strategies for water and soil conservation and water-sediment regulation in the middle Yellow River; and they provide fundamental provenance analysis data for future studies of the connectivity of the Yuxi Gorge, and sedimentary and geomorphological research related to the diversion of the Yellow River to the Huaihe River Basin.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"484 ","pages":"Article 109824"},"PeriodicalIF":3.1,"publicationDate":"2025-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144084570","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":"A morphometric analysis of embayed beaches: southern Sardinia Island","authors":"Antonio Usai ,&nbsp;Simone Simeone ,&nbsp;Daniele Trogu ,&nbsp;Marco Porta ,&nbsp;Sandro De Muro","doi":"10.1016/j.geomorph.2025.109838","DOIUrl":"10.1016/j.geomorph.2025.109838","url":null,"abstract":"<div><div>Embayed beaches are widely distributed along the world's coastlines. They are characterised by a curvilinear shoreline and the presence of headlands (natural or artificial) that laterally constrain the beach. Several methods have been proposed in the scientific literature to estimate the degree of embaymentisation. This study carried out a morphometric analysis of embayed beaches along the southern coast of Sardinia Island and a classification comparison using the Platform Index (<em>I</em>) and the Embayment Morphometric Parameter (<em>γ</em>_<em>e</em>). Overall, 79 beaches were identified through the analysis of aerial orthophotos. Furthermore, the type of embayment (natural or artificial) and the degree of headland impact on the surf zone circulation, with the Non-Dimensional Embayment Scaling Parameter (<em>δ′</em>), were estimated. The results reveal that a detailed morphometric analysis of embayed beaches provides valuable insights into the beach dynamics that influence its morphology and response to hydrodynamic forcing. Given the increasing vulnerability of coastal zones to climate change, sea-level rise, and extreme weather events, such morphometric analyses play a crucial role in assessing the response of embayed beaches to these factors. Consequently, they provide a scientific basis for improving coastal management strategies, risk assessment, and resilience planning, particularly in beaches where data availability is limited or that has been alternated by human interventions, such as the construction of engineering structures.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"483 ","pages":"Article 109838"},"PeriodicalIF":3.1,"publicationDate":"2025-05-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070279","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":"Tracing landscape evolution using stream profile analysis along the Iron Gates, Danube River, Romania","authors":"Nicolae Cruceru ,&nbsp;Maria Rădoane ,&nbsp;Ioana Perșoiu ,&nbsp;Alfred Vespremeanu-Stroe ,&nbsp;Zsófia Ruszkiczay-Rüdiger","doi":"10.1016/j.geomorph.2025.109837","DOIUrl":"10.1016/j.geomorph.2025.109837","url":null,"abstract":"<div><div>The Iron Gates is a narrow and deep-incised valley section of the Danube River, cutting through the mountain range formed by the Southern Carpathians and North-Balkan Mountains, forming a transverse drainagebetween the Pannonian and Dacian Basins. In the present work longitudinal profiles of 97 tributaries of the left side of the Danube River are analyzed to provide information about the geomorphologic evolution of the area. The stream length-gradient (<em>SL</em>) index anomalies were used to investigate the relationship between between Danube incision, local lithology and regional tectonic processes affecting the area.</div><div>By analyzing the <em>SL</em> index anomalies of the Danube tributaries, 8 erosional levels have been identified. The uppermost two levels (L8 and L7) are located at an altitude ranging along the Iron Gates between 410 and 550 m a.s.l., and 330–490 m a.s.l., respectively. These could be correlated with pre-Danubian planation surfaces, described by previous authors. They show an upwarped elevation pattern along the river, indicative of differential uplift rates with the higher values at the central range of the study area (Almăj Mountains).</div><div>For most tributaries, the largest <em>SL</em> index anomaly values were recorded for the subsequent level (L6), which developed at 230–360 m a.s.l. This zone separates the upstream relict profiles from the steeper, rejuvenated downstream valley segments. It corresponds to the “Ciucaru/Kazan” level, the lowest well developed planation surface above the incised gorge, equivalent of the highest strath terrace of the Danube. Its abandonment by the incising Danube River means the onset of the antecedent formation of the Iron Gates. The knickzones below the „Ciucaru/Kazan” level along tributaries reflect successive phases of incision of the streams, as adaptations to the local base level drop following the incising Danube. The upwarped pattern of the knickzone levels along the gorge (being the highest in the Almăj Mountains) is gradually faded towards the lower levels. The lithology only slightly influenced the occurrence of slope anomalies and the concavity of longitudinal profiles, but without an essential contribution regarding the spatial pattern of erosional levels.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"483 ","pages":"Article 109837"},"PeriodicalIF":3.1,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144070281","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":"Morphological dynamics and vegetation interactions in coastal dunes: UAV-based insights from Pingtan Island, China","authors":"Shuyi Fu ,&nbsp;Yuxiang Dong ,&nbsp;Wei Tian ,&nbsp;Xiaofan Mo ,&nbsp;Delong Ma ,&nbsp;Jianhui Du ,&nbsp;Zhenhuan Liu ,&nbsp;Liang Hu","doi":"10.1016/j.geomorph.2025.109832","DOIUrl":"10.1016/j.geomorph.2025.109832","url":null,"abstract":"<div><div>The interactions between vegetation and morphology on coastal dunes are essential for understanding and managing biogeomorphological processes. While these interactions have been studied at dune field or transect scales over weekly, annual, and decadal timescales, the coupling of individual dunes across several types at seasonal scales remains poorly understood. We selected nine coastal dunes of three types along Tannan Bay on Pingtan Island, China. Seasonal investigations combining unmanned aerial vehicle-based LiDAR monitoring and vegetation surveys were conducted to evaluate vegetation and dune morphology dynamics and analyze their interactions. The results revealed that (1) sediment accumulation increased from the beach to the windward slope but decreased near the dune crest and leeward slope. This accumulation was significant in winter and was controlled by spatiotemporal vegetation dynamics, typhoons, and topographic variations. (2) Coastal dune morphology influenced vegetation distribution, with vegetation on incipient foredunes and nebkhas concentrated on windward slopes and in interdunal areas. Blowouts are primarily found near the inlet and depositional zones. (3) Vegetation and dune elevation were significantly correlated along the across-shore gradient. Results indicate that a 1 % increase in coverage leads to a rise in dune elevation of 0.029–0.067 m, most pronounced in spring and weakest in summer. Additionally, vegetation cover was significantly associated with erosion–deposition in most dunes. Our findings demonstrate the impact of vegetation on dune morphological dynamics and their responses. These results enhance our understanding of eco-geomorphic feedback in coastal dune evolution, facilitating more effective coastal management and restoration.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"483 ","pages":"Article 109832"},"PeriodicalIF":3.1,"publicationDate":"2025-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068926","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":"Pleistocene glacial geomorphology and chronology of the Nahuel Huapi-Limay and Traful catchments, northern Patagonia","authors":"Ignacio Mizerit ,&nbsp;Ezequiel Garcia Morabito ,&nbsp;Florencia Bechis ,&nbsp;Carla M. Terrizzano ,&nbsp;Alexander R. Groos ,&nbsp;Georg Rugel ,&nbsp;Silke Merchel ,&nbsp;Roland Zech","doi":"10.1016/j.geomorph.2025.109836","DOIUrl":"10.1016/j.geomorph.2025.109836","url":null,"abstract":"<div><div>The Nahuel Huapi Lake-Limay River catchment and the Traful River catchment are key localities for reconstruction of Quaternary glaciations and environmental changes in northern Patagonia. These sites present very well preserved glacial landforms; their location with respect to the Andes mountains allows us to evaluate the influence of the Southern Westerly Winds on the past climate at 41°S. In an attempt to refine the local timing of past glaciations in this region, we present mapping results and fourteen in situ ¹⁰Be exposure ages from boulders of different moraine systems that reflect a series of pronounced past glacial advances. We combine our age constraints with recalculated previously published moraine boulder ages. The surface exposure ages suggest that the Nahuel Huapi/Limay outlet glacier reached positions close to its maximum extent of the last glacial cycle at 112.3 ± 2.4 ka. This age implies glacier expansion during a colder period at the beginning of the Last Glacial period (Marine Isotope Stage 5d), out of phase with global ice volume records, although an older age for this advance cannot be ruled out. We suggest that the northward migration of the Southern Westerly Winds, coupled with an increase in precipitation, could be contributing factors to this glacial advance. During the Last Glacial Maximum, a less-extensive advance occurred at 26.8 ± 1.4 ka in the Nahuel Huapi-Limay River catchment and between 26.8 ± 5.4 and 24.1 ± 4.3 ka in Traful River catchment.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"485 ","pages":"Article 109836"},"PeriodicalIF":3.1,"publicationDate":"2025-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144185914","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":"Pervasive speleogenetic modification of cave passages by nitrification of biogenic ammonia","authors":"Andrew R. Farrant ,&nbsp;J. Max Koether ,&nbsp;Hazel A. Barton ,&nbsp;Stein-Erik Lauritzen ,&nbsp;Christos Pennos ,&nbsp;Andrew C. Smith ,&nbsp;Jo White ,&nbsp;Andrew McLeod ,&nbsp;Andrew J. Eavis","doi":"10.1016/j.geomorph.2025.109822","DOIUrl":"10.1016/j.geomorph.2025.109822","url":null,"abstract":"<div><div>It has long been known that guano deposits from animals in caves can cause localised biogenic modification through a combination of acidity and altered environmental conditions, such as increased humidity and CO₂. Geomorphological and geochemical evidence from the caves in the Gunung Mulu National Park, Sarawak, suggest this biogenic overprint may be far more widespread than previously thought due to microbial metabolic activity. Based on our observations, we propose a novel method of secondary cave enlargement by the conversion of highly soluble ammonia gas released by bat and swiftlet guano to NOx on surfaces by microbial ammonia oxidation. Our data suggest this activity produces aggressive nitric acid solutions on moist cave walls, accelerating limestone dissolution. This previously undescribed cave enlargement process has potentially profound geomorphological implications, as the original passage morphologies (which are used to interpret speleogenesis and landscape evolution) are erased and replaced with a distinctive suite of biogenic corrosion features. Such findings significantly alter our understanding of post-speleogenetic modification and secondary enlargement of caves in tropic environments.</div></div>","PeriodicalId":55115,"journal":{"name":"Geomorphology","volume":"483 ","pages":"Article 109822"},"PeriodicalIF":3.1,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068927","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}