Article
Geosciences, Multidisciplinary
Yukun Shi, Xiangdong Wang, Junxuan Fan, Hao Huang, Huiqing Xu, Yingying Zhao, Shuzhong Shen
Summary: Recent study revealed a rapid increase of marine fauna species and genus richness during the Late Paleozoic Ice Age, lasting 41.2 million years and named as Carboniferous-earliest Permian Biodiversification Event (CPBE). The event included a slow increase episode and a main radiation episode, with most distinct patterns in fusulinid foraminifera and decreasing trends in nektonic conodonts and cephalopods, possibly related to marine environmental shifts caused by the Rheic Ocean closure.
EARTH-SCIENCE REVIEWS
(2021)
Article
Geology
Pierre Dietrich, Neil P. Griffis, Daniel P. Le Heron, Isabel P. Montanez, Christoph Kettler, Cecile Robin, Francois Guillocheau
Summary: Research has shown that U-shaped valleys in northwestern Namibia from the late Paleozoic ice age represent intact fjord-network morphologies, providing insight into ancient ice dynamics and climate regulation. The preserved glacial morphology in this region allows for reconstruction of past ice thicknesses and glacier dynamics. Fjords likely played a crucial role in both glacier dynamics and organic carbon sequestration during this icehouse period.
Article
Geography, Physical
Gabriel E. B. de Barros, Bruno Becker-Kerber, Daniel Sedorko, Joao Henrique Dobler Lima, Mirian L. A. F. Pacheco
Summary: The Aquidauana Formation in Brazil's Late Paleozoic Ice Age presents a unique sedimentary record with a rich ichnofossil assemblage dominated by small arthropods, reflecting low functional morphology richness and environmental stress related to glacial environments. The presence of Warvichnium and Monomorphichnus distinguishes it from other Gondwanic glacial deposits, suggesting a relationship with freshwater influence and invertebrate colonization followed by subaerial exposure.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geography, Physical
Arpad David, Alfred Uchman, Ricardo S. Ramalho, Jose Madeira, Carlos S. Melo, Patricia Madeira, Ana Cristina Rebelo, Bjoern Berning, Markes E. Johnson, Sergio P. Avila
Summary: Pliocene body fossils from Santa Maria Island in Azores have been studied for decades, with recent attention focusing on ichnofossils. Deposits from the Baia de Nossa Senhora section contain well-preserved invertebrate borings, providing insights into the dispersal of benthic faunas. The borings, belonging to various ichnogenera, suggest that the bearing bioclasts have been exposed for several years on the sea floor.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Environmental Sciences
Stanislaw Leszczynski, Michal J. Warchol, Wojciech Nemec
Summary: This study examines the Aptian lower part of the Carolinefjellet Formation in the Norwegian high Arctic using well cores and outcrop sections. It focuses on the deposits and bioturbation structures of an ancient subpolar marine shelf during a period of global greenhouse climate. The study reveals that sedimentation conditions and benthic fauna activity were influenced by harsh Arctic wave climate and base-level changes, including occasional incursions of cold polar water. The research also highlights the impact of seafloor hydraulic regime, oxygenation, wave climate, and relative sea-level changes on the ichnofauna ecology.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Review
Geography, Physical
Diana L. Boyer, Aaron M. Martinez, Scott D. Evans, Phoebe A. Cohen, Emily E. Haddad, Katherine H. Pippenger, Gordon D. Love, Mary L. Droser
Summary: The Late Devonian witnessed significant taxonomic and ecological turnovers, with reduced oxygen conditions playing a key role. Research using a dataset from 17 localities in New York and Ohio revealed prolonged oxygen stress in the Appalachian Basin during this time, impacting biological communities and redox conditions in the water column. The study also highlighted unique signals during the Lower and Upper Kellwasser Events, as well as the Hangenberg Biocrisis, suggesting different drivers and responses for each extinction event.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geology
Yi Zheng, Lijie Long, Pengpeng Yu, Xinchang Zhang, Zhaobin Hu, Yihan Wu
Summary: This study investigates the metal endowment process of the Yunfu iron-sulfide deposit in the Yunkai Domain in South China. The results suggest that the metal accumulation was attributed to bacterial sulfate reduction during rapid deposition in an anoxic-seawater column. The findings support the formation of the deposit during Late Paleozoic sedimentary exhalative deposition and hydrothermal activity.
ORE GEOLOGY REVIEWS
(2022)
Article
Paleontology
Dhiego Cunha da Silva, Cristina Silveira Vega, Fernando Farias Vesely, Danielle Cristine Buzatto Schemiko, Robson Tadeu Bolzon
Summary: Ichnology is essential in understanding paleoenvironmental characteristics, with the study of the Itarare Group providing valuable insights into the Late Paleozoic Ice Age in western Gondwana. A new trace fossil discovered in this study may offer further evidence of a subaerial paleoenvironment in the region.
ICHNOS-AN INTERNATIONAL JOURNAL FOR PLANT AND ANIMAL TRACES
(2021)
Article
Geosciences, Multidisciplinary
Michal Stachacz, Marcelina Kondas, Pawel Filipiak, Xueping Ma
Summary: The geological and palynological study of two sections in the Central Asian Orogenic Belt in northwestern China revealed unfavorable conditions for benthic communities during the Late Devonian and Early Carboniferous, primarily due to rapid sedimentation of volcanic material. The presence of specific miospores allowed for tentative identification of palynostratigraphical levels, indicating deposition in varying proximal and distal environments.
ACTA GEOLOGICA SINICA-ENGLISH EDITION
(2021)
Article
Geosciences, Multidisciplinary
Mariano German Arregui, Isabel Eugenia Giannoni, Augusto Nicolas Varela
Summary: This paper presents a sedimentological and ichnological study of the Palermo Aike Formation in Southern Argentina. It identifies three different ichnofacies, including Cruziana ichnofacies, Zoophycos ichnofacies, and a mixed Cruziana ichnofacies. The findings have important implications for understanding the oil source rocks and unconventional reservoirs in the region.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Yang -Yang Wang, Yilin Xiao, He Sun, Fengtai Tong, Hai -Ou Gu, Yigan Lu
Summary: This study explores the contributions of continental silicate weathering to the Late Paleozoic Ice Age (LPIA) through analyzing lithium isotope records in Carboniferous seawater. The results suggest that uplift of the Hercynian orogen and radiation of tropical forests played crucial roles in initiating and maintaining the LPIA.
JOURNAL OF ASIAN EARTH SCIENCES
(2021)
Article
Geosciences, Multidisciplinary
Ya Gao, David J. W. Piper, Alexandre Normandeau, Xinong Xie
Summary: Complex relationships between alongslope and downslope sediment dispersion exist on glaciated continental margins in eastern Canada. Late Quaternary sediment architecture is influenced by downslope glacial meltwater discharge, alongslope bottom currents, and ice-rafting. During the last glacial maximum and early deglaciation, turbidity currents and contourite depositional systems developed on the SW Grand Banks Slope off eastern Canada.
Article
Geosciences, Multidisciplinary
Qing Sun, Xiaobo Zhao, Chunji Xue, Reimar Seltmann, Sean H. McClenaghan, Haixia Chu, Min Wang
Summary: The evolution of the western Tianshan Orogen was characterized by prolonged accretion and collision processes. The Late Carboniferous magmatism in the Awulale Mountains was likely a result of ongoing subduction, while the Early Permian magmatism may have been caused by post-collisional delamination of the lower crust and lithospheric mantle. This study provides important insights into the geological evolution and tectonic transition processes of the western Tianshan.
Article
Geography, Physical
Joao Pedro Saldanha, Lucas Del Mouro, Rodrigo Scalise Horodyski, Matias do Nascimento Ritter, Hugo Schmidt-Neto
Summary: Through a detailed taphonomic survey of the Lontras Shale Lagersta, we discovered a rock layer that represents a climatic optimum of the end of the Late Paleozoic Ice Age, with a temperate outer fjord and rich biota. This finding provides an important reference for studying biological, climatic, and stratigraphic changes associated with icehouse-greenhouse transitions in the past, present, and future.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Puqing Li, Dongfang Song, Hao Zeng
Summary: By analyzing the field-constrained detrital zircon U-Pb data of Silurian-Carboniferous marine sediments in Bayan Obo, Inner Mongolia, this study reveals the accretionary history of the southeast Altaids. The results show that the collision between the Bainaimiao arc and the North China Craton occurred between -322-306 Ma, leading to the southward subduction of the Paleo-Asian Ocean beneath the North China Craton and the formation of an Andean-type arc system.
JOURNAL OF ASIAN EARTH SCIENCES
(2023)