Article
Geochemistry & Geophysics
Chloe M. Marcilly, Pierre Maffre, Guillaume Le Hir, Alexandre Pohl, Frederic Fluteau, Yves Godderis, Yannick Donnadieu, Thea H. Heimdal, Trond H. Torsvik
Summary: This study presents new simulations of pCO(2) and surface temperatures during the Ordovician period and finds that the intense cooling trend observed during this period cannot be fully explained. Inverse modeling suggests that the degassing necessary to reach Early Ordovician temperatures is three-to-five times higher than modern values, and the solid Earth degassing must be reduced to modern-day levels within a short period of time to simulate the subsequent cooling trend.
EARTH AND PLANETARY SCIENCE LETTERS
(2022)
Article
Geosciences, Multidisciplinary
Ziqi Zhong, Jinkai Xia, Shaoying Huang, Caiming Luo, Haining Chang, Xiang Li, Lunyan Wei, Hao Zhang
Summary: The Tarim Basin, a large superimposed basin, has undergone complex tectonic-sedimentary evolution and is rich in petroleum resources. The study of the proto-type basin and tectono-paleogeographic evolution of the Tarim Basin is essential for understanding the distribution of petroleum reservoirs and guiding petroleum exploration. By analyzing various data, including residual thickness maps and seismic data, the scopes of the proto-type basin were determined, and the changes in sedimentary and uplift-depression patterns caused by tectonic transformations were reconstructed.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Multidisciplinary Sciences
Erik A. Sperling, Michael J. Melchin, Tiffani Fraser, Richard G. Stockey, Una C. Farrell, Liam Bhajan, Tessa N. Brunoir, Devon B. Cole, Benjamin C. Gill, Alfred Lenz, David K. Loydell, Joseph Malinowski, Austin J. Miller, Stephanie Plaza-Torres, Beatrice Bock, Alan D. Rooney, Sabrina A. Tecklenburg, Jacqueline M. Vogel, Noah J. Planavsky, Justin Strauss
Summary: The study in Yukon, Canada revealed a nearly continuous record of seafloor redox change from the deep-water upper Cambrian to Middle Devonian Road River Group, indicating the persistence of Neoproterozoic-like marine redox conditions with widespread ferruginous bottom waters during the similar to 80-million-year interval of the Paleozoic.
Article
Geography, Physical
Mesut Simsek, Muhammed Zeynel Oeztuerk, Serdar Yesilyurt, Mustafa Utlu
Summary: The Eastern Black Sea Mountains underwent glaciation during the Quaternary, resulting in the formation of numerous cirque sites. The development and morphology of these cirques are influenced by aspect and elevation. The former Equilibrium Line Altitude (ELA) is found to decrease with increasing latitude, distance from the watershed, and decreasing topographic elevations.
Review
Geosciences, Multidisciplinary
Christopher Wnuk
Summary: Coal formation in Asia is closely related to the transit of the subcontinent through the Intertropical Convergence Zone. Coal is most abundant in coastal areas within the Zone, which also experienced high rainfall and elevated atmospheric CO2 concentrations. The formation of coal is influenced by factors such as plant growth, sediment input, and CO2 concentration. Accumulation of carbon in the form of peat, carbonaceous shale, and plant debris helps to sequester atmospheric CO2. The potential for carbon sequestration in the Bara Formation of Pakistan is significant, but large areas of coal potential remain unexplored.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
Igor Soejono, Vojtech Janousek, Vit Peresty, Karel Schulmann, Martin Svojtka, Pavel Hanzl, John M. Hora, Jitka Mikova, Pavla Stipska, Alexandra Guy, Stephen Collett, Dorjsuren Otgonbaatar
Summary: A study on the magmatic record in the Zavkhan Block, part of the Mongolian Collage in the Central Asian Orogenic Belt, revealed two distinct magmatic events in the region, Late Tonian (c. 840-800 Ma) and Cambro-Ordovician (c. 510-470 Ma). These events represent different sources and evolution processes of the crust, indicating the breakup of Rodinia and the development of a continental magmatic-arc system during the Cambro-Ordovician.
Review
Geology
Biao Gao, Jitao Chen, Wenkun Qie, Xiangdong Wang
Summary: The Baoshan, Tengchong, Lhasa, South Qiangtang, and Sibumasu terranes were part of Gondwana before separating and moving away from the northern margin in the Early Permian. The paleopositions of these terranes during the late Paleozoic are still debated, which hampers the understanding of the tectonic evolution of the PaleoTethys and glacier distribution patterns on eastern Gondwana during the late Paleozoic ice age. Through analysis of detrital zircon U-Pb dating and Hf isotope signatures, this study proposes a new paleogeographic model that suggests the South Qiangtang, Baoshan, and part of Sibumasu were located outside the northern margin of Indian Gondwana, while the Lhasa and Sumatra terranes were along the northern margin of Australia. Based on shifts in provenance of late Paleozoic glaciogenic sedimentary rocks, the study also hypothesizes the development of two main ice sheets during the late Paleozoic. This research contributes to the understanding of the late Paleozoic tectonic and paleoclimatic history of Gondwana.
SEDIMENTARY GEOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Jobst Wendt
Summary: The eastern Anti-Atlas of Morocco is one of the most completely exposed and perfectly documented biostratigraphic records of the entire Devonian worldwide. The area is differentiated into shallow basins, pelagic platforms, and land areas, with the Tafilalt Platform being the dominant paleogeographic feature providing the best-documented biostratigraphic record through the entire Devonian.
INTERNATIONAL JOURNAL OF EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Michael J. Orchard
Summary: The Upper Triassic conodont genus Primatella is significant for identifying the Carnian-Norian stage boundary in the Panthalassan and Tethyan regions. The occurrence and distribution of two key species, P. asymmetrica and P. bifida, in various regions, including North American Cordillera, Great Basin, western Tethys, and Timor-Leste, are documented. However, the differing nomenclature in Tethyan regions has complicated the correlation potential of Primatella species, thereby impacting their stratigraphic utility.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geography, Physical
Timothy F. Lawton, Ronald C. Blakey, Daniel F. Stockli, Li Liu
Summary: The passage discusses the evolution of sediment-dispersal networks from the Late Mississippian to the middle Permian in western equatorial Pangea, influenced by climate, eustasy, and the late Paleozoic orogenic system. Different geological events, such as uplifts, basins, and river systems, contributed to the transportation and distribution of sediment across the region, shaping the landscape over time.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Biology
Melike Bilgin, Peter Joniak, Pablo Pelaez Campomanes, Fikret Goktas, Serdar Mayda, Coen Lorinser, Jan Wijbrans, Tanju Kaya, Lars W. van den Hoek Ostende
Summary: The new micromammal site of Beydere 3 in Anatolia represents a typical fauna of the MN3 period, with Eumyarion species dominating and two new species discovered. The site also yielded nine species of rodents and an ochotonid, including the first common occurrence of Megacricetodon in Anatolia, indicating possible environmental changes towards wet conditions. Radiometric dating suggests the age of the locality to be older than 18.21 (+/- 0.19) Ma.
HISTORICAL BIOLOGY
(2023)
Article
Geography, Physical
Ryan J. Leary, Jay Quade, Michael Read, Gregory P. Wahlman
Summary: Studying the sedimentary rocks in the Monitor Range of central Nevada from lower Permian to Permian-Triassic revealed different sedimentation patterns over time, indicative of potential tectonic changes.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Jinkai Xia, Ziqi Zhong, Shaoying Huang, Caiming Luo, Hong Lou, Haining Chang, Xiang Li, Lunyan Wei
Summary: The Tarim basin is a complex sedimentary basin that has undergone multiple and polycyclic tectonic movements. Understanding its prototype basin and tectono-paleogeographic evolution is crucial for understanding the tectonic systems and hydrocarbon exploration. This paper provides maps and illustrations to depict the tectonic and paleogeographic features of the Tarim basin during the Late Paleozoic.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Geosciences, Multidisciplinary
Mathew Domeier, Eric Font, Nasrrddine Youbi, Joshua Davies, Samantha Nemkin, Rob Van der Voo, Morgann Perrot, Mohamed Benabbou, Moulay Ahmed Boumehdi, Trond H. Torsvik
Summary: This study revisits the early geometry of Pangea using new geochronological and paleomagnetic data, confirming the Pangea A model and providing detailed geological comparisons and reconstructions.
Article
Multidisciplinary Sciences
Samuel L. Goldberg, Theodore M. Present, Seth Finnegan, Kristin D. Bergmann
Summary: By utilizing clumped and bulk isotope analyses of micritic carbonates, this study sheds light on the oxygen isotope information embedded in the Early Paleozoic geological records. With a large dataset and high resolution analyses, new insights into paleoclimate trends are obtained.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Plant Sciences
David M. Kroeck, Mats E. Eriksson, Anders Lindskog, Axel Munnecke, Michel Dubois, Sylvie Regnier, Thomas Servais
Summary: Studies on peteinoid acritarchs from the Middle Ordovician strata of oland, Sweden showed continuous variability in morphology, making it difficult to distinguish different taxa. These findings challenge the current classification system based on differentiation into three genera and multiple species, suggesting that the observed morphologies may be produced by a few highly variable phytoplanktonic organisms or even a single species.
Review
Geosciences, Multidisciplinary
Eliott Capel, Christopher J. Cleal, Jinzhuang Xue, Claude Monnet, Thomas Servais, Borja Cascales-Minana
Summary: This study characterizes the development of Silurian-Devonian vegetation and discusses how different plant groups impacted diversity and evolutionary rates. The findings suggest a stepwise pattern of origination and extinction events that led to major floral transitions. Furthermore, the study shows a significant correlation between observed diversity and sampling effort, indicating the potential influence of sampling bias.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geosciences, Multidisciplinary
Valentin Bault, Diego Balseiro, Claude Monnet, Catherine Cronier
Summary: Trilobites were the most successful clade of marine invertebrates during the Cambrian, but their diversity declined after the end-Ordovician extinction event. This study investigates the evolutionary history and diversity dynamics of trilobites after the crisis, revealing different faunas and environmental influences.
EARTH-SCIENCE REVIEWS
(2022)
Review
Geosciences, Multidisciplinary
David M. Kroeck, Gary Mullins, Axelle Zacai, Claude Monnet, Thomas Servais
Summary: Phytoplankton, as the base of marine trophic chains, play a crucial role in marine ecosystems and climate history. This study investigates the taxonomic diversity trajectories of phytoplankton throughout the Paleozoic, using a comprehensive database of over 4000 species. The results reveal temporal trends in phytoplankton diversity and possible factors influencing these trends, including paleogeography, sea-level changes, sediment influx, and atmospheric CO2 concentration, temperature, and sea ice cover.
EARTH-SCIENCE REVIEWS
(2022)
Review
Geosciences, Multidisciplinary
David M. Kroeck, Gary Mullins, Claude Monnet, Thomas Servais
Summary: This article cites several works by Martin to present a hypothesis about the change in nutrient availability during the Paleozoic era, contrasting it with the notion based on terrestrial sediment input. Martin expands on this hypothesis in his discussion paper and highlights factors that were neglected in the previous review.
EARTH-SCIENCE REVIEWS
(2022)
Article
Paleontology
Valentin Bault, Catherine Cronier, Claude Monnet
Summary: This study investigates the morphological evolution of trilobites during the Devonian period and explores the influence of abiotic and biotic factors on their shape. The results reveal significant variations in shape disparity among different stages of the Devonian, with a severe loss of disparity during the Givetian, a time characterized by important environmental changes. Trilobite orders that survived the Devonian events exhibited a wider range of morphologies and were better adapted to withstand environmental change. Moreover, shapes inherited from the Silurian persisted throughout the Devonian, while novelties in the Pragian were most affected by losses.
Article
Plant Sciences
Navid Navidi-Izad, Houcine Benachour, David M. Kroeck, Philippe Steemans, Thomas Servais
Summary: The study revises the taxonomy, biostratigraphy, and paleobiogeography of two early Ordovician genera Virgatasporites and Attritasporites, found at the Gondwanan border and not yet discovered at the margins of other paleocontinents. Due to the uncertainty surrounding their biological affiliation, they are temporarily classified as acritarchs.
Article
Geosciences, Multidisciplinary
Abdelkader Abbache, Abdelkader Ouali Mehadji, Ninon Allaire, Claude Monnet, Catherine Cronier, Mansour Zaagane, Aicha Fetati
Summary: This study describes the widespread occurrence of 'griotte' facies in the Late Devonian of the Ben-Zireg area, Bechar basin, Southwestern Algeria. Based on field observations and analysis of thin sections, the authors identify three members within the Ben-Zireg Formation and characterize three Late Devonian biozones. Six microfacies types are also identified, revealing the marine environment characteristics of the area.
JOURNAL OF AFRICAN EARTH SCIENCES
(2022)
Article
Biology
Valentin Bault, Catherine Cronier, Claude Monnet
Summary: The study on Devonian trilobites from North Africa shows that morphological disparity and taxonomic richness are often decoupled in time, especially during the early history of clades. However, this pattern is pervasive during the late evolutionary history of trilobites, with both morphological disparity and taxonomic diversity increasing. The Middle Devonian anoxic events caused a simultaneous drastic loss of both morphologies and taxonomic richness. The weak Famennian recovery suggests that trilobites were a 'dead clade walking' during their late evolutionary history.
HISTORICAL BIOLOGY
(2023)
Article
Geology
Romain Jattiot, Claude Monnet, Jens Lehmann, Hugh Gwyn Owen
Summary: By analyzing a substantial dataset of late Albian ammonite occurrences from western Europe, a major diversity decrease during the uppermost Albian period is identified, which is concurrent with the well-known Oceanic Anoxic Event OAE1d.
NEWSLETTERS ON STRATIGRAPHY
(2023)
Article
Paleontology
Eliott Capel, Claude Monnet, Christopher J. Cleal, Jinzhuang Xue, Thomas Servais, Borja Cascales-Minana
Summary: The Silurian-Devonian plant radiation was a critical development in the evolution of early terrestrial ecosystems. A comprehensive compilation of plant occurrences from North America and lithological data were used to investigate the relationship between the palaeobotanical and geological records of early land plants. The results show that observed diversity patterns are significantly influenced by fluctuations in sedimentary rock volume. Geological incompleteness remains a fundamental bias for describing early plant diversification.
Article
Paleontology
Valentin Bault, Catherine Cronier, Claude Monnet, Diego Balseiro, Fernanda Serra, Beatriz Waisfeld, Arnaud Bignon, Juan Jose Rustan
Summary: This study investigates the shape evolution of Phacopidae during the Silurian-Devonian period using geometric morphometrics and morphological disparity indices. The results reveal morphological variations between Phacopidae genera, primarily in facial suture position, visual complex size, genal angle shape, and elongation of the cephalon and pygidium. The study also observes a peak in morphological disparity during the Early Devonian, followed by a sharp decrease in the Middle Devonian.
Article
Paleontology
Ninon Allaire, Samuel Ginot, Kenneth de Baets, Dieter Korn, Nicolas Goudemand, Claude Monnet, Catherine Cronier
Summary: The Devonian ammonoids fossils in the Anti-Atlas of Morocco provide a valuable record of morphological disparity changes during the early stages of ammonoid evolution. In this study, the morphological disparity of these fossils was analyzed using geometric morphometric approaches. The results show an increase in disparity during the Early Devonian, followed by fluctuating disparity during the Middle Devonian, with a significant decrease during the end-Eifelian Kacak Event. However, there was no evidence of an early burst of shape diversity.
ACTA PALAEONTOLOGICA POLONICA
(2023)
Article
Multidisciplinary Sciences
Fernanda Serra, Diego Balseiro, Claude Monnet, Enrique Randolfe, Arnaud Bignon, Juan J. Rustan, Valentin Bault, Diego F. Munoz, N. Emilio Vaccari, Malena Martinetto, Catherine Cronier, Beatriz G. Waisfeld
Summary: Modern morphometric-based approaches provide valuable metrics for quantifying and understanding macroevolutionary and macroecological patterns and processes. TriloMorph is an openly accessible database that offers morpho-geometric information of trilobites, along with contextual data such as chronostratigraphic age, geographic location, taxonomic information, and lithology of landmarked specimens.
Article
Plant Sciences
Gar W. Rothwell, Ruth A. Stockey
Summary: This study utilizes anatomical analysis of fossils from Vancouver Island, Canada, to support the development of a whole plant concept for the Eocene species of Gleichenia and provide data for the first organismal concept of an extinct species of Gleichenia from the Cenozoic fossil record. The findings suggest that the characteristics of the Gleicheniaceae family were present during the Cretaceous and Paleogene periods, with modern species well-established and diversifying.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Kathrin Ganz, Cesar Morales-Molino, Erika Gobet, Dmytro Kiosak, Nadezhda Kotova, Jacqueline van Leeuwen, Sergey Makhortykh, Christoph Schworer, Willy Tinner
Summary: This study presents a palaeoecological reinvestigation from the Kardashynskyi mire in southern Ukraine, reconstructing the vegetation dynamics, fire history, and land use for the past 8300 years. The results show that both climate and human activities have driven the vegetation changes, and the remaining special vegetation types are severely threatened under current conditions.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Willem O. van der Knaap, Bas van Geel, Jacqueline F. N. van Leeuwen, Frans Roescher, Dick Mol
Summary: Pollen analysis of fossilized teeth from a giant deer found in The Netherlands provides insights into the diet, landscape, and climate of the specimen. The study suggests that the giant deer most likely lived during the early Eemian or an early Weichselian interstadial.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Yun Guo, Yu Zhou, Josef Psenicka, Jiri Bek, Jana Votockova Frojdova, Zhuo Feng
Summary: A new species of adpressed leptosporangiate fern, Szea yunnanensis sp. nov., is described from Yunnan Province, Southwest China. The fronds of this new species have unique characteristics such as fertile pinnules with triangular to falcate shape and abaxial sori arranged in one row on each side of the midvein.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Adele C. M. Julier, Glynis J. Humphrey, Caitlin Dixon, Lindsey Gillson
Summary: The relationships between woody vegetation cover and fire, climate, herbivory, and human activities in African savanna ecosystems are complex. Fire suppression policies implemented in a national park in northeast Namibia from 1888 to 2005 did not lead to noticeable decreases in fire or enhanced tree recruitment, suggesting that fire occurrence in savanna ecosystems is more closely linked to climate than management. Fire management should adapt to rainfall variability and integrate customs of early dry season burning.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
Article
Plant Sciences
Milan Libertin, Jiri Kvacek, Jiri Bek
Summary: This paper revises the genus Aberlemnia from the Early Devonian of Scotland based on its type-material A. caledonica and describes a new species, Aberlemnia krizii sp. nov, from the Silurian of Czechia. The study provides detailed diagnoses and highlights the differences between the two species. Aberlemnia is positioned on an evolutionary clade line leading to the Lycophytina.
REVIEW OF PALAEOBOTANY AND PALYNOLOGY
(2024)
