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Diagenetic dolomite in planktonic foraminifera on the Australian Northwest Shelf Sedimentology (IF 3.5) Pub Date : 2024-03-15 Song Zhao, Katharine M. Grant, Bradley N. Opdyke, Ulrike Troitzsch, Ian S. Williams
Planktonic foraminiferal shells are widely used to investigate past oceanographic and climatic variations via their trace elements and stable isotopes. However, these geochemical methods may be compromised by the presence of diagenetic high‐Mg calcite. In this study, dolomite crystals are observed in planktonic foraminifera from International Ocean Discovery Program Site U1464 sediments on the Australian
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Morphodynamics and depositional architecture of mid‐channel bars in large Amazonian rivers Sedimentology (IF 3.5) Pub Date : 2024-03-13 Renato P. Almeida, Cristiano P. Galeazzi, Jim Best, Marco Ianniruberto, Ariel H. Do Prado, Liliane Janikian, Carlos E. M. Mazoca, Larissa N. Tamura, Andrew Nicholas
Large rivers are characterized by large water discharges, high suspended sediment fluxes and low slope, and typically display multiple channels that are separated by large complex bars. The most common channel style found in these rivers is characterized by the alternating presence of single and multiple channel threads. Mid‐channel compound bars separate a main deeper channel from shallower secondary
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The hidden biotic face of microbialite morphogenesis – a case study from Laguna de Los Cisnes, southernmost Patagonia (Chile) Sedimentology (IF 3.5) Pub Date : 2024-03-12 Clément G. L. Pollier, Alejandro N. Guerrero, Jorge Rabassa, Daniel Ariztegui
Microbialites provide geological evidence into Earth's early ecosystems, recording long‐standing interactions between co‐evolving life and the environment. Yet, after more than 100 years of research, the complex interplay between environmental and biological forces involved in microbialite growth is still debated. Laguna de Los Cisnes, located in Chilean Tierra del Fuego, Patagonia, provides a unique
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Carbonate microbialites and chemotrophic microbes: Insights from caves from south‐east China Sedimentology (IF 3.5) Pub Date : 2024-02-28 Min Ren, Brian Jones, Xiaomin Nie, Xin Lin, Chuang Meng
Chemosynthetic microorganisms facilitate microbialite development in many caves throughout the world. In Youqin Cave and Tian'e Cave, located in the Carboniferous–Triassic carbonates on the South China Block, five Quaternary speleothems (stalagmite, stalactite and cave pearl) that are 2.3 to 11.0 cm long were examined for their petrographic, geochemical and microbiological features to reveal how chemotrophs
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High‐frequency palaeoenvironmental changes in the mixed siliciclastic–carbonate sedimentary system from a lower Permian restricted basin (West Gondwana, southern Brazil) Sedimentology (IF 3.5) Pub Date : 2024-02-21 Ailton S. Brito, Afonso C. R. Nogueira, Renan F. Dos Santos, Rômulo S. Angélica, René Rodrigues
Global climatic and palaeogeographical changes generated a siliciclastic–carbonate system with high organic matter accumulations in a shallow sea during the lower Permian in Western Gondwana. The 60 m thick mixed siliciclastic–carbonate succession (Irati Formation and the base of the Serra Alta Formation) from the Paraná Basin represents a singular record of the interplay between carbonate production
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Origin, evolution and significance of giant buried sediment mounds near the Sahara Slide Complex, North-west African margin Sedimentology (IF 3.5) Pub Date : 2024-02-16 Wei Li, Sebastian Krastel, Tiago M. Alves, Song Jing, Michele Rebesco, Felix Gross, Morelia Urlaub, Aggeliki Georgiopoulou
Mixed turbidite–contourite depositional systems result from interactions between down-slope turbidity currents and along-slope bottom currents, comprising excellent records of past oceanographic currents. Modern and ancient systems have been widely documented along the continental margins of the Atlantic Ocean. Yet, few examples have so far been identified on the North-west African continental margin
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Grain-size component dependent storage threshold of orbital cycles in alluvial stratigraphy caused by autogenic dynamics Sedimentology (IF 3.5) Pub Date : 2024-02-16 Daming Yang, Yongjian Huang, Xiang Li, Jianlei Gao, Shitao Yin, Chengshan Wang
Numerical forward modelling and laboratory experiments suggest that autogenic factors in the sediment routing system serve as long-pass filters, preserving only orbital cycles with a period exceeding the compensation timescale, Tc, or thickness in the depth domain exceeding the compensation depth scale, Hc. For a specific orbital cycle with a certain period, this preservation in alluvial strata occurs
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Autogenic evolution of valley-confined deltas during sea-level rise: Insights from numerical and physical modelling Sedimentology (IF 3.5) Pub Date : 2024-02-15 Ru Wang, Wonsuck Kim, Luca Colombera, Nigel P. Mountney, Yunhyeong Lee, Jaehyung Lee
Nearshore incised valleys are important conduits for the transport of sediment, nutrients, pollutants and organic carbon from the continents to the sea. Therefore, it is essential to understand the autogenic evolution of deltas confined within incised valleys and how such evolution is affected by relative sea-level rise. To date, limited research has focused on how deltas constrained by incised valleys
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Late‐Holocene counterpoint deposition in the Lower Rhine River Sedimentology (IF 3.5) Pub Date : 2024-02-20 Lisa Boterman, Jasper Candel, Bart Makaske, Jakob Wallinga
Channel deposits from meandering rivers have proven to be far more complex than the well‐known lithofacies model consisting of coarse‐grained channel, gravelly channel‐lag and fine‐grained overbank deposits. Sharp bends in rivers are subject to different hydraulic processes than bends with lower curvatures, enabling erosion of inner banks and deposition of fine‐grained sediments in the outer bend,
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Corrigendum to: Architecture of lacustrine deposits in response to early Carboniferous rifting and Gondwanan glaciation, Nova Scotia, south-east Canada Sedimentology (IF 3.5) Pub Date : 2024-02-09
Tang, W., Pe Piper, G., Piper, D.J.W., Chen, A., Hou, M., Guo, Z. and Zhang, Y. (2024) Architecture of lacustrine deposits in response to early Carboniferous rifting and Gondwanan glaciation, Nova Scotia, south-east Canada. Sedimentology, 71, 457–485. The published version of Fig. 5 is incorrect. The correct version, with its caption, is provided below. Fig. 5 Open in figure viewerPowerPoint Soft-sediment
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Unidirectional and combined transitional flow bedforms: Controls on process and distribution in submarine slope settings Sedimentology (IF 3.5) Pub Date : 2024-02-05 William J. Taylor, David M. Hodgson, Jeff Peakall, Ian A. Kane, Emma A. Morris, Stephen S. Flint
Mixed grain-size bedforms comprise alternating sand-rich and poorly sorted mud-rich laminae and bands. These bedforms have been identified in distal submarine settings formed underneath unidirectional flows. This study documents mixed grain-size bedforms in a proximal submarine slope setting formed beneath both unidirectional and combined flows. Core and outcrop data with well-constrained palaeogeographical
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Co-precipitation of primary dolomite and Mg-rich clays in Deep Springs Lake, California Sedimentology (IF 3.5) Pub Date : 2024-01-31 Franklin W. C. Hobbs, Yihang Fang, Noah Lebrun, Yiping Yang, Huifang Xu
In contrast to the prevalence of dolomite [CaMg(CO3)2] in the geological record, there are few instances of recent formation. This discrepancy occurs despite supersaturation with respect to dolomite in many modern marine and lacustrine environments. Additionally, laboratory experiments have struggled to precipitate dolomite at ambient temperatures (<40°C) even under highly saturated conditions. However
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Strontium isotope dating influenced by Rubidium contamination from terrestrial material: A case study from the Cenozoic dolomite in the Xisha Islands, South China Sea Sedimentology (IF 3.5) Pub Date : 2024-01-28 Rui Wang, Kefu Yu, Brian Jones, Wei Jiang, Tianlai Fan, Yang Yang, Songye Wu
Strontium isotopes (87Sr/86Sr) are commonly used to assess the age of Cenozoic dolostones found on many isolated oceanic islands. The possible influence of Rubidium (Rb) content on the 87Sr/86Sr ratios, however, has generally been ignored. This critical issue is assessed by examining the 87Sr/86Sr ratios and elements (Rb, Sr, Al, Ti and K) of seventy-one samples that came from a ca 339 m thick cored
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Logratio analysis of components separated from grain-size distributions and implications for sedimentary processes: An example of bottom surface sediments in a shallow lake Sedimentology (IF 3.5) Pub Date : 2023-12-21 Naofumi Yamaguchi, Tsuyoshi Ando, Hirotaka Enokida, Natsumi Nakada, Syota Yamaki, Tohru Ohta
The grain-size distributions of sediments can yield important information about sediment provenance and sedimentary processes; however, grain-size distributions are frequently polymodal, rendering analyses difficult. To improve analyses of polymodal grain-size data, the present study decomposed the grain-size distributions of bottom surface sediments from Lake Kitaura, a shallow lake in Japan, into
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Fossilized autogenic responses of grain-size transition to sediment supply and water discharge: Alluvial fan experiments Sedimentology (IF 3.5) Pub Date : 2023-12-20 Haein Shin, Wonsuck Kim, Hyojae Lee, Joel P. L. Johnson, Chris Paola
Autogenic feedbacks can produce large-scale, organized stratigraphic patterns in alluvial fans, but autogenic depositional signatures of specific upstream boundary conditions remain challenging to interpret. Here, a combination of theory, experiment and field application is used to explore how autogenic lithofacies changes can be interpreted as stratigraphic indicators of upstream boundary conditions
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Carbonate production and reef building under ferruginous seawater conditions in the Cambrian rift branches of the Avalon Zone, Newfoundland Sedimentology (IF 3.5) Pub Date : 2023-12-16 José Javier Álvaro, Andrea Mills
The characterization of carbonate production on rift basins is critical for understanding the nucleation and demise of reefs in tectonically active areas. A new petrographic and mineralogical analysis of Cambrian strata from the Avalon Zone in Newfoundland, based on scanning electron microscopy – back-scattered electron detector and Raman spectrometer analyses, facilitates recognition of several episodes
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Tectonically induced travertine deposition in the Middle Miocene Levač intramountain basin (Central Serbia) Sedimentology (IF 3.5) Pub Date : 2023-12-14 Nevena Andrić-Tomašević, Vladimir Simić, Dragana Životić, Nenad Nikolić, Aleksandra Pavlović, Tobias Kluge, Aratz Beranoaguirre, Jeroen Smit, Achim Bechtel
Travertines are terrestrial carbonates that are commonly associated with fault activity in extensional and transtensional basins. The faults serve as conduits for the rising and mixing of carbonate-enriched fluids with thermal and meteoric CO2 inputs promoting travertine precipitation at the surface. Therefore, travertine successions provide key constraint on the faulting, depositional environments
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Role of bottom water chemistry in the formation of fibrous magnesium calcite at methane seeps in the Black Sea Sedimentology (IF 3.5) Pub Date : 2023-12-02 Yang Lu, Boriana Mihailova, Thomas Malcherek, Carsten Paulmann, Daniel Smrzka, Jennifer Zwicker, Zhiyong Lin, Gerhard Bohrmann, Jörn Peckmann
Climate change poses a significant challenge for life on Earth. Different climate modes have been shown to come along with changes of the magnesium/calcium (Mg/Ca) ratio of seawater, and such changes are believed to control the primary mineral phase of marine authigenic carbonates. However, factors controlling marine carbonate phases other than seawater Mg/Ca ratios exist. Fibrous cements forming at
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Sedimentary environment and benthic oxygenation history of the Upper Cretaceous Austin Chalk Group, south Texas: An integrated ichnological, sedimentological and geochemical approach Sedimentology (IF 3.5) Pub Date : 2023-12-01 Charlie Y. C. Zheng, Charles Kerans, Luis A. Buatois, M. Gabriela Mángano, Lucy T. Ko
Oxygen concentration in the ocean is vital for sustaining marine ecosystems. While the potential impacts of deoxygenation on modern oceans are hard to predict, lessons can be learned from better characterizing past geological intervals formed under a greenhouse climate. The greenhouse Cretaceous containing several oceanic anoxic events characterized by widespread oxygen-deficient water is ideal in
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Large-scale sedimentary shift induced by a mega-dam in deltaic flats Sedimentology (IF 3.5) Pub Date : 2023-11-29 Jie Wang, Zhijun Dai, Sergio Fagherazzi, Yaying Lou, Xuefei Mei, Binbin Ma
Deltas are crucial for land building and ecological services due to their ability to store mineral sediment, carbon and potential pollutants. A decline in suspended sediment discharge in large rivers caused by the construction of mega-dams might imperil deltaic flats and wetlands. However, there has not been clear evidence of a sedimentary shift in the downstream tidal flats that feed coastal wetlands
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Impact of wave, tides and fluid mud on fluvial discharge across a compound clinoform (Pliocene Orinoco Delta) Sedimentology (IF 3.5) Pub Date : 2023-11-27 Ariana Osman, Ronald J. Steel, Ryan Ramsook, Cornel Olariu
Compound clinoforms are well-recognized in modern large muddy deltas and in some ancient deltas, but there is still a lack of understanding regarding their lithology variations and the process by which sand from the shoreline clinothem reaches the subaqueous clinothem foresets that are sometimes 100 km away. Net-to-gross, thickness and facies association evaluation show overall coarsening-upward through
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Sedimentary record of bottom currents and internal tides in a modern highstand submarine canyon head Sedimentology (IF 3.5) Pub Date : 2023-11-21 Alexandre Normandeau, Lynn T. Dafoe, Michael Z. Li, D. Calvin Campbell, Kimberley A. Jenner
The evolution of submarine canyons is primarily controlled by turbidity currents, which erode and fill them over time; however, many other hydrodynamic currents operate within canyons. Bottom currents from these other hydrodynamic processes, including internal tides, can be dominant processes, but their deposits are seldom recognized in sediment cores or the rock record. This study combines autonomous
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Radiocarbon ages of microcrystalline authigenic carbonate in Lake Neusiedl (Austria) suggest millennial-scale growth of Mg-calcite and protodolomite Sedimentology (IF 3.5) Pub Date : 2023-11-20 Stephanie Neuhuber, Susanne Gier, Erich Draganits, Peter Steier, Monika Bolka, Franz Ottner, Christoph Spötl, Dorothee Hippler, Patrick Meister
Authigenic Mg-calcite and dolomite are frequently observed in restricted, evaporative environments, such as lagoon or lake systems, but their formation is difficult to capture due to slow growth rates. Lake Neusiedl, an alkaline and subhaline lake with a mean water depth of 0.7 m in Austria, offers a natural system to study the precipitation of Ca-Mg-carbonate phases, which occur as fine-grained, unconsolidated
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Sedimentological and ichnological variations in fluvio-tidal translating point bars, McMurray Formation, Alberta, Canada Sedimentology (IF 3.5) Pub Date : 2023-11-20 Susanne W. Fietz, James A. MacEachern, Murray K. Gingras, Michael Ranger, Shahin E. Dashtgard
Sedimentological and ichnological descriptions of fluvio-tidal translating point bars are rare, and complex physico-chemical processes make highly detailed but concise facies descriptions challenging. Herein, mesofacies are defined to describe and interpret three ancient translating point bars from the Lower Cretaceous McMurray Formation, Alberta, Canada. Twenty-three mesofacies are defined, based
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Evolution from shallow-water deltas to fluvial fans in lacustrine basins: A case study from the Middle Jurassic Shaximiao Formation in the central Sichuan Basin, China Sedimentology (IF 3.5) Pub Date : 2023-11-20 Tian Yang, Xiaofang Li, Yu Yang, Long Wen, Zhenglin Cao, Xiaojuan Wang, Shaomin Zhang, Qiangshao Liang
Distinguishing between shallow-water delta and fluvial fan deposits in the subsurface of lacustrine basins is challenging due to their similar depositional characteristics and distribution patterns. This study focuses on the Middle Jurassic Shaximiao Formation in the central Sichuan Basin using core observations, seismic analyses, petrology analyses, zircon analyses, palaeoclimate indicators and palaeocurrent
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Sedimentary evolution and lake level fluctuations of Urmia Lake (north-west Iran) over the past 50 000 years; insights from Artemia faecal pellet records Sedimentology (IF 3.5) Pub Date : 2023-11-17 Selma Sarı, Ali Mohammadi, Georg Schwamborn, Negar Haghipour, Byung Yong Yu, Kürşad Kadir Eriş, Razyeh Lak
A 25 m long sediment core from hypersaline Urmia Lake (north-west Iran) was studied for the Late Quaternary depositional history and palaeoclimate variations using the abundance and compositional characteristics of Artemia faecal pellets. Sediment analysis is supported by scanning electron microscopy – energy dispersive X-ray spectroscopy, organic and inorganic carbon content measurements, and stable
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On depositional processes governing along-strike facies variations of fine-grained deposits: Unlocking the Little Ice Age subaqueous clinothems on the Adriatic shelf Sedimentology (IF 3.5) Pub Date : 2023-11-16 Claudio Pellegrini, Irene Sammartino, Juergen Schieber, Tommaso Tesi, Francesco Paladini de Mendoza, Veronica Rossi, Jacopo Chiggiato, Katrin Schroeder, Andrea Gallerani, Leonardo Langone, Fabio Trincardi, Alessandro Amorosi
Depositional processes recorded by shelf deposits may vary widely along-strike, depending largely on the mode of delivery and deposition of sediments to the basin. In fine-grained systems in particular, depositional processes are difficult to reconstruct with standard facies analysis of sediment cores due to the ostensibly featureless and homogenous appearance of muds. In this study, sedimentological
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Processes controlling rare earth element distribution in sedimentary apatite: Insights from spectroscopy, in situ geochemistry and O and Sr isotope composition Sedimentology (IF 3.5) Pub Date : 2023-11-15 Sophie Decrée, Etienne Deloule, Renata Barros, Julien Mercadier, Stefan Höhn, Chantal Peiffert, Jean-Marc Baele
In phosphorites, the content and distribution of rare earth elements are linked to the environment of phosphogenesis. This paper focuses on the question of sources and processes controlling the rare earth element content of apatite from Belgian phosphorites formed during three major phosphogenic events in the Lower Palaeozoic, Late Cretaceous and Cenozoic. To constrain sources and processes, new data
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Hydrochemical mixing-zones trigger dolomite formation in an alkaline lake Sedimentology (IF 3.5) Pub Date : 2023-11-09 Jeremy McCormack, Andre Baldermann, Tomaso R. R. Bontognali, Annabel Wolf, Ola Kwiecien
Dolomite is globally present in past geological records, but rare in modern environments. The mechanisms favouring its precipitation under ambient conditions remain highly debated. This study investigates sediments, containing high concentrations of early diagenetic calcian dolomite, from alkaline Lake Van (Republic of Türkiye, formally Turkey) dating back to 252 ka bp. Powder X-ray diffraction and
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Soft-sediment deformation structures and Neptunian dykes across a carbonate system: Evidence for an earthquake-related origin (Norian, Dolomia Principale, Southern Alps, Italy) Sedimentology (IF 3.5) Pub Date : 2023-11-09 Fabrizio Berra
Identification of the processes producing soft-sediment deformation structures, common in siliciclastic deposits and less abundant in carbonate successions, is complex, because different processes may produce similar structures. Thus, interpreting the origin of these structures may be challenging: it requires both a detailed sedimentological study, and the knowledge of the depositional environment
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Microbialites on the northern shelf of Lake Van, eastern Türkiye: Morphology, texture, stable isotope geochemistry and age# Sedimentology (IF 3.5) Pub Date : 2023-10-29 M. Namık Çağatay, Emre Damcı, Germain Bayon, Mustafa Sarı
Lake Van, the world's largest alkaline lake, hosts some of the largest microbialite towers worldwide, which are considered as modern analogues of ancient stromatolites. This study investigates the links between microbialite evolution, geology, climate and hydrology, and the role of biotic and abiotic processes in microbialite growth and morphology. For these objectives, the northern shelf of Lake Van
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Bedform evolution along a submarine canyon in the South China Sea: New insights from an autonomous underwater vehicle survey Sedimentology (IF 3.5) Pub Date : 2023-10-29 Yue Sun, Dawei Wang, Miquel Canals, Tiago M. Alves, Weiwei Wang, Yousheng Zhu, Yongpeng Qin, Fanchang Zeng, Yu Zheng
Traditional mapping of bedforms in submarine canyons relied on vessel-mounted and towed sensors, but their fine-scale geomorphology and shallow structure requires higher resolution datasets. This study utilizes a high-resolution dataset obtained from an autonomous underwater vehicle, combined with seismic reflection profiles and sediment cores, to analyse bedform sets within a 25.6 km long submarine
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Spatial, seasonal and climatic drivers of suspended sediment atop Great Bahama Bank Sedimentology (IF 3.5) Pub Date : 2023-10-22 Cecilia Lopez-Gamundi, Brian B. Barnes, Anna C. Bakker, Paul (Mitch) Harris, Gregor P. Eberli, Sam J. Purkis
Suspension is the key mechanism by which fine-grained sediment (≤125 μm) is winnowed and transported across shallow-water carbonate platforms into adjacent deep waters. Unlike sliding and saltation, which deliver sedimentary structures via bedload, the sedimentological signature of suspended sediment is more cryptic. This study focuses on suspended sediment, and its drivers – wind, waves and tides
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New insights into the palaeoenvironmental–palaeoclimatic significance and sedimentary dynamics of carbonate Lagerstätten: The lower Albian of Pietraroja (Southern Italy) Sedimentology (IF 3.5) Pub Date : 2023-10-19 Roberto Graziano, Arturo Raspini, Antonello Bartiromo
This study reports the first high-resolution, integrated facies analysis of the lowermost Albian Pietraroja Lagerstätten (Apennine Carbonate Platform) which yields the first dinosaur (Scipionyx samniticus) found in Italy and other terrestrial vertebrates and plants. Aiming to clarify the long-debated palaeoenvironmental significance of the Pietraroja succession, the following have been carried out:
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Microborings reveal alternating agitation, resting and sleeping stages of modern marine ooids Sedimentology (IF 3.5) Pub Date : 2023-10-17 Phyllis Mono, René Hoffmann, Max Wisshak, Stephen W. Lokier, Chelsea L. Pederson, Dominik Hennhoefer, Mara R. Diaz, Peter K. Swart, Gernot Nehrke, Adrian Immenhauser
Ooids are abundant carbonate grains throughout much of Earth's history, but their formation is not well understood. Here, an in-depth study of microbial bioerosion features of Holocene ooids from the Schooner Cays ooid shoals (Great Bahama Bank, Eleuthera, Bahamas) and the Shalil al Ud ooid shoals in the Arabian/Persian Gulf (Abu Dhabi, United Arab Emirates) is presented. No obvious differences were
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On the origin of chevron marks and striated grooves, and their use in predicting mud bed rheology Sedimentology (IF 3.5) Pub Date : 2023-10-16 Dylan McGowan, Amisha Salian, Jaco H. Baas, Jeff Peakall, Jim Best
Understanding of the formative conditions of many sole structures is limited, with chevron marks and striated groove marks being particularly enigmatic. These sedimentary structures are examined here through laboratory modelling. An idealized tool, resembling an armoured mud clast, was dragged through substrates of kaolinite–seawater mixtures of different yield strengths while submerged in seawater
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Effects of clay and organic matter on calcareous nannofossil ooze erodibility Sedimentology (IF 3.5) Pub Date : 2023-10-16 Toms Buls, Kresten Anderskouv, Patrick L. Friend, Charlotte E. L. Thompson, Lars Stemmerik
Bottom current activity has been responsible for the formation of a multitude of erosional and depositional features recorded in chalk. Advanced knowledge on the mobility and transport of unlithified calcareous nannofossil ooze by bottom currents is increasingly important not only for understanding the deposition of ancient chalk, but also for modelling the behaviour of modern pelagic carbonate sediments
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The thickness variability of fluvial cross-strata as a record of dune disequilibrium and palaeohydrology proxy: A test against channel deposits Sedimentology (IF 3.5) Pub Date : 2023-10-09 Luca Colombera, Arnold J. H. Reesink, Robert A. Duller, Victoria A. Jeavons, Nigel P. Mountney
Strata produced by fluvial dunes can provide insight into the hydrological regime of ancient rivers. Recent experiments indicate that conditions of disequilibrium between bedforms and formative flows may be inferred from the coefficient of variation of preserved dune cross-set thickness, suggesting that this quantity may act as a proxy for the flashiness of river floods relative to the time required
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Hummocky sedimentary structures within rippled beds due to combined orbital waves and transverse currents Sedimentology (IF 3.5) Pub Date : 2023-10-08 Xuxu Wu, Paul A. Carling, Daniel Parsons
Hummocky cross-stratification is commonly observed in the marine offshore transition to lower shoreface environments. However, to date, the origins of hummocky cross-stratification and its associated hummocky bedforms and hydrodynamic processes remain controversial and enigmatic. In the present study, a large-scale flume experiment was conducted to study the formation of hummocky bedforms. In the central
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A clumped isotope diagenetic framework for the Ediacaran dolomites: Insights to fabric-specific geochemical variabilities Sedimentology (IF 3.5) Pub Date : 2023-10-07 Chaojin Lu, Ardiansyah Koeshidayatullah, Fei Li, Huan Cui, Huayao Zou, Peter K. Swart
While marine dolomites formed under near surface conditions have been considered to be potentially reliable archives of past oceanic conditions, this interpretation comes with significant challenges because diagenetic alteration frequently produces diverse fabrics with large geochemical variability. It has been suggested that the Ediacaran dolomites in South China (Hamajing Member, Dengying Formation)
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Authigenic-cemented pebbles formed during Pleisto–Holocene transgression of gently inclined coastal plains Sedimentology (IF 3.5) Pub Date : 2023-10-07 Andreas Wetzel, Helge Niemann
From numerous modern gently inclined coastal areas and deltas around the world carbonate-cemented sandstone slabs and pebbles have been reported. Such sandstones collected at the coast of the German North Sea and the Mediterranean Sea (Rhône Delta) are cemented by calcite derived from the anaerobic oxidation of methane, as evidenced by biomarkers and δ13C isotope values <−35‰ typical of anaerobic oxidation
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Autogenic and allogenic controls on turbidite lobe stacking pattern and architecture: The case of the Turonian to Coniacian deep-water turbidite lobe complexes (Dønna Terrace, offshore Mid-Norway) Sedimentology (IF 3.5) Pub Date : 2023-10-03 Romain Grime, Philippe Sorrel, Kevin Boulesteix, Sebastien Landru, Alexandre Bouche, Tim Rice, Benjamin Kyle Bowlin, Bernard Pittet
The mechanisms controlling the stacking patterns of deep-water turbidite lobes are currently open to a wide range of interpretations. A study of Turonian to Coniacian turbidite lobe complexes in the greater Marulk area (Dønna Terrace, Norwegian Sea) was undertaken to examine the balance and respective influences of various controlling factors using a large sediment core, well-log and seismic dataset
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Shallow-marine calciclastic mass-transport deposits in an evolving thrust-top basin: A case study from the North Dalmatian foreland basin, Croatia Sedimentology (IF 3.5) Pub Date : 2023-10-03 Katarina Gobo, Ervin Mrinjek, Vlasta Ćosović, Roko Ramov, Karla Vlatković
Mass-transport deposits are products of resedimentation phenomena involving a broad spectrum of gravity-driven processes, and commonly have a high preservation potential in deep-marine environments. This study documents various types of mass-transport deposits that are interbedded with intensely bioturbated shallow-marine calciclastic sediments deposited along a reflective coast during the middle and
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High-magnesium calcite skeletons provide magnesium for burrow-selective dolomitization in Cretaceous carbonates Sedimentology (IF 3.5) Pub Date : 2023-10-01 Hangyu Liu, Kaibo Shi, Bo Liu, Yong Li, Yang Li, Haofu Zheng, Yuting Peng, Yingxiao Fu
The source and pumping mechanism of magnesium play crucial roles in dolomitization. The preferential dolomitization of burrows has been extensively documented in geological archives. Although burrows are abundantly preserved in Cretaceous carbonates, burrow-selective dolomitization is uncommon in normal salinity marine environments due to the low Mg/Ca ratio of seawater. However, burrow-selective dolomitization
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Architecture of lacustrine deposits in response to early Carboniferous rifting and Gondwanan glaciation, Nova Scotia, south-east Canada Sedimentology (IF 3.5) Pub Date : 2023-09-29 Wenbin Tang, Georgia Pe-Piper, David J. W. Piper, Anqing Chen, Mingcai Hou, Zhaojie Guo, Yuanyuan Zhang
Upper Palaeozoic lacustrine basin deposits not only record local tectonism but are also an archive to evaluate global palaeoclimate changes linked to the Late Palaeozoic Gondwanan ice age. The Tournaisian Horton Group of Nova Scotia, south-east Canada, accumulated in rift basins following the final accretion of peri-Gondwanan terranes to the Appalachians. Sedimentology, mineralogy and geochemistry
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Rhythmic iron-oxide bands of Navajo Sandstone concretions and Kimberley banded claystone: Formation process and buffering reaction rate by diagenetic alteration Sedimentology (IF 3.5) Pub Date : 2023-09-15 Nagayoshi Katsuta, Sin-iti Sirono, Ayako Umemura, Hirokazu Kawahara, Yuma Masuki, Chikage Yoshimizu, Ichiro Tayasu, Takuma Murakami, Hidekazu Yoshida
Both igneous and sedimentary rocks affected by water–rock interaction commonly form rhythmic Fe-oxide bands that provide information on palaeo-groundwater. This study investigated the formation of Fe-oxide banded patterns of concentrically banded concretions from the Jurassic Navajo Sandstone (United States) and banded claystone ‘zebra rock’ from the Neoproterozoic Johnny Cake Shale Member (Western
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Seismic stratigraphy of Late Pleistocene incised valleys and adjacent environments, eastern Central Luconia Province, offshore north-west Borneo Sedimentology (IF 3.5) Pub Date : 2023-09-13 Habibah Hanan Mat Yusoff, Howard D. Johnson, Lidia Lonergan, Alexander C. Whittaker, Azli Abu Bakar
Incised valleys are commonly investigated based on outcrop, modern setting and seismic data, which are often limited by data availability, especially for broad (ca >100 km wide) shelf settings. Consequently, few have described complete depositional systems of the incised valleys, especially those linked to their corresponding modern rivers in a source-to-sink framework to determine comprehensive controlling
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Gravitational resedimentation as a fundamental process in filling fjords: Lessons from outcrops from a late Palaeozoic fjord in Namibia Sedimentology (IF 3.5) Pub Date : 2023-09-12 Eduardo Menozzo da Rosa, John L. Isbell, Natalie McNall, Nicholas Fedorchuk, Roger Swart
The stratigraphic architecture of fjords is complicated due to the delicate interplay between ice dynamics, sediment supply, relative sea-level fluctuations and slope failures. Glaciogenic sediment is prone to failure and to be carried downslope to the fjord floor through the entire spectrum of mass movements and subaqueous density flows, as the unstable paraglacial submarine landscape moves towards
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Formation of magnesium-clay in a lacustrine microbialite-bearing carbonate deposit, Eocene Green River Formation, Sanpete County, Utah Sedimentology (IF 3.5) Pub Date : 2023-09-12 Daniel F. Cupertino, Camila Wense Ramnani, Michael D. Vanden Berg, Stanley M. Awramik
Authigenic magnesium-clays have been observed and documented in the Green River Formation, specifically as ooidal stevensite grains. Magnesian clays are a valuable proxy for reconstructing shallow-water, saline–alkaline lake palaeoenvironments due to their responses to chemical changes. Magnesium-rich clay minerals are relatively common components in modern and ancient lake systems. A rare interaction
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Three-dimensional stratigraphic architecture, secondary pore system development and the Middle Pleistocene transition, Sandy Point area, San Salvador Island, Bahamas Sedimentology (IF 3.5) Pub Date : 2023-08-26 Andrea Nolting, Charles Kerans, Fermin Fernandez-Ibanez, Shawn Fullmer, Paul Joseph Moore, Charles I. Breithaupt, Stephanie LeBlanc, Michelle Dafov, Eric Bunge, Jason Gulley
The Bahamian Archipelago has been the subject of extensive studies of stratigraphy, carbonate island morphology and diagenetic overprinting for many decades. A recently-acquired dataset comprised of high-resolution light detection and ranging, tightly spaced cored boreholes with image logs, thin sections, porosity and permeability measurements, and isotopic geochemical analyses provides a unique opportunity
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Estimation of fine sediment stocks in gravel bed rivers including the sand fraction Sedimentology (IF 3.5) Pub Date : 2023-08-22 Junjian Deng, Benoît Camenen, Cédric Legout, Guillaume Nord
Fine sediment stored in the gravel bed is an important component of river systems. Current field protocols usually allow evaluation of the silt–clay fraction of fine sediment stocks only and neglect the sand fraction. This study proposes a new protocol to quantify fine sediment stocks, including the sand fraction inside the gravel bed matrix. Fine sediment stocks were sampled within patches of 0.30 m × 0
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The role of fluvial and tidal currents on coal accumulation in a mixed-energy deltaic setting: Pinghu Formation, Xihu Depression, East China Sea Shelf Basin Sedimentology (IF 3.5) Pub Date : 2023-08-22 Wenchao Shen, Longyi Shao, Qianyu Zhou, Jinshui Liu, Kenneth A. Eriksson, Shilong Kang, Ronald J. Steel
The Eocene Pinghu Formation in the Xihu Depression of the East China Sea Shelf preserves mixed-process deltaic deposits and contains a large number of thin coal seams. This study improves the prediction of coal seam occurrences based on facies distribution and stratigraphic architecture models of deltaic deposits, using core and wireline log datasets. Sedimentological analysis reveals four facies associations
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Erratum to Marine carbonate factories: Review and update Sedimentology (IF 3.5) Pub Date : 2023-08-18
Reijmer, J.J.G. (2021) Marine carbonate factories: review and update. Sedimentology, 68, 1729–1796. https://doi.org/10.1111/sed.12878 In the caption to Fig. 14 of Reijmer (2021), the authors cited Della Porta et al. (2002, 2004) but unintentionally omitted to cite a later publication by Della Porta et al. (2017). The latter paper was based on Della Porta et al. (2002, 2004), Della Porta et al. (2003)
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Holocene seismic activity in south-eastern Switzerland: Evidence from the sedimentary record of Lake Silvaplana Sedimentology (IF 3.5) Pub Date : 2023-08-15 Benjamin Bellwald, Valentin Nigg, Stefano C. Fabbri, Lukas W. M. Becker, Adrian Gilli, Flavio S. Anselmetti
High-Alpine regions are prone to a large variety of geohazards, among which earthquakes have the strongest impact on landscape and local population. Historic records indicate a moderate to high seismic activity in the northern, south-western and central parts of Switzerland. In contrast, south-eastern Switzerland has less historic earthquake chronicles due to the low population density, resulting in
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Spatial distribution and variability of lobe facies in a large sand-rich submarine fan system: Neoproterozoic Zerrissene Group, Namibia Sedimentology (IF 3.5) Pub Date : 2023-08-09 Nora M. Nieminski, Tim R. McHargue, Jared T. Gooley, Andrea Fildani, Donald R. Lowe
The deposits of the upper Neoproterozoic Zerrissene Group of central-western Namibia represent a large siliciclastic deep-water depositional system that showcases the intricacies of facies and architectural relationships from bed-scale to fan-system-scale. The lack of vegetation in the Namib Desert and regular east–west repetition of folded stratigraphy (reflecting ca 50% tectonic shortening) provides
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Geochemical evidence of provenance diversity in Holocene sandy land of Qinghai Lake Basin in the north-eastern margin of Qinghai–Tibet Plateau and its implications for climate change Sedimentology (IF 3.5) Pub Date : 2023-07-27 Zhiyong Ding, Ruijie Lu, Xiaokang Liu, Yongqiu Wu, Dongxue Chen
The Qinghai Lake Basin, located in the north-eastern Tibetan Plateau, is crucial for understanding the East Asian monsoon evolution and its interaction with westerlies. Palaeoclimatic studies in this region since the Holocene have primarily focused on interpreting proxy significance from sediments, resulting in being highly controversial. However, exploring palaeoclimate evolution through sediment
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Sedimentological and ichnological characterization of delta front mouth bars in a river-dominated delta (Upper Cretaceous) from the La Anita Formation, Austral Basin, Argentina Sedimentology (IF 3.5) Pub Date : 2023-07-21 Juan José Ponce, Noelia Carmona, Damián Jait, Martín Cevallos, Christian Rojas
Integrated sedimentological and ichnological studies in deltaic systems are key to determine whether a delta is river-dominated, tide-dominated, wave-dominated or hybrid, and thus predict the distribution of their geometries and main reservoirs. The Austral Basin is one of the most important oil and gas basins from Argentina, and the Upper Cretaceous La Anita Formation has shown excellent attributes
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Sedimentary evolution and sequence stratigraphy of Ediacaran high-grade phosphorite–dolomite–shale successions of the Bocaina Formation (Corumbá Group), Central Brazil: Implications for the Neoproterozoic phosphogenic event Sedimentology (IF 3.5) Pub Date : 2023-07-15 João Pedro T. M. Hippertt, Isaac D. Rudnitzki, Luana Morais, Bernardo Freitas, Guilherme R. Romero, Henrique A. Fernandes, Mariangela G. P. Leite, Juliana M. Leme, Paulo Boggiani, Ricardo I. F. Trindade
Extensive phosphorite deposition is observed in the Neoproterozoic after a prolonged hiatus during most of the Mesoproterozoic era. This event is thought to represent an important record of major palaeoenvironmental, palaeoceanographic and biotic changes that shaped Neoproterozoic ecosystems, suggesting close relationships between phosphogenesis and the preservation of key Ediacaran biotas. However
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Tracing the sedimentary response to the rifting and opening of the Meso-Tethys Ocean Sedimentology (IF 3.5) Pub Date : 2023-07-13 Jian-Jun Fan, Bo-Chuan Zhang, Yaoling Niu, An-Bo Luo, Yu-Jie Hao
Knowledge of the rifting and opening process of the Meso-Tethys Ocean is important for understanding the evolution of the Tethys tectonic domain and for an in-depth understanding of Tethys dynamics. Sedimentary rocks are faithful recorders of surface expressions of tectonic events and are thus expected to have recorded the rifting and opening of the Meso-Tethys Ocean. This study presents petrography
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Effects of sodium and potassium concentrations on dolomite formation rate, stoichiometry and crystallographic characteristics Sedimentology (IF 3.5) Pub Date : 2023-07-12 Mohammed S. Hashim, Katharine G. Rose, Hanna F. Cohen, Stephen E. Kaczmarek
This study uses high temperature (215°C) dolomitization experiments to explore the effects of sodium (Na) and potassium (K), two common constituents of natural fluids, on dolomite formation rate, stoichiometry and crystallographic characteristics. In these experiments, aragonite ooids were dolomitized in Mg–Ca–Cl solutions with either no additional salt, or in solutions containing NaCl or KCl at different