Article
Geosciences, Multidisciplinary
Amine Cherif, Madani Benyoucef, Mohammed Nadir Naimi, Bruno Ferre, Ahmed Zeghari, Camille Frau, Ali Berrabah
Summary: The study explores the lithostratigraphic units and ichnofacies characteristics of the Berriasian-Valanginian succession in northwestern Algeria, showcasing nine ichnotaxa for the first time in the early Cretaceous of Algeria. This ichno-association suggests a deepening environment from the platform to the basin as seen in previous studies in the Mediterranean region during the same time interval.
JOURNAL OF AFRICAN EARTH SCIENCES
(2021)
Article
Geography, Physical
Mohammad J. Razmjooei, Jorijntje Henderiks, Helen K. Coxall, Karl-Heinz Baumann, Flor Vermassen, Martin Jakobsson, Frank Niessen, Matt O'Regan
Summary: Despite extensive studies, the relationship between the age and sub-seafloor depth of Arctic Ocean sediments is still ambiguous. High-resolution biostratigraphic analysis of late Quaternary sediments in the central Arctic Ocean reveals a radically different geochronological framework, which helps reconcile different dating approaches and brings us one step closer to accurate paleoceanographic reconstructions.
QUATERNARY SCIENCE REVIEWS
(2023)
Article
Geography, Physical
Santiago Casanova-Arenillas, Francisco J. Rodriguez-Tovar, Francisca Martinez-Ruiz
Summary: Research has shown that during the Last Glacial Cycle, climatically induced changes in ocean dynamics affected the tracemaker habitat in the Alboran Sea Basin. The trace fossil assemblage exhibited long-term and short-term fluctuations, correlating with sea-surface temperature records and delta O-18 profiles of Greenland ice cores. This indicates a reconstruction of climatically induced changes in ocean dynamics that have significant impacts on deep-sea environmental conditions in the Western Mediterranean Deep Water.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geosciences, Multidisciplinary
Wieslawa Radmacher, Martin J. Head, Alfred Uchman, Mateusz Mikolajczak, Malgorzata Lempart-Drozd, Grzegorz Piotr Kaczmarczyk, Daniel Walach
Summary: This article describes a low-cost method for obtaining narrow blocks of the friable Nicola bed and analyzes the sedimentary structures and trace fossils found in the bed, as well as their relationship with GSSP and oxygen levels.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geology
Andrea Baucon, Carlos Neto de Carvalho, Fabrizio Felletti, Gabriele Tosadori, Alexandre Antonelli
Summary: The study reveals that burrow morphologies show persistent patterns over evolutionary time scales, influenced by small-world dynamics and forming associations between shallow and deep-sea burrows. This pattern follows assembly rules similar to those shaping human social networks.
Article
Environmental Sciences
B. Rogalla, S. E. Allen, M. Colombo, P. G. Myers, K. J. Orians
Summary: Biogeochemical cycles in the Arctic Ocean are sensitive to the transport of materials from continental shelves into central basins by sea ice. Manganese (Mn) is an important micronutrient and tracer, and sea ice is the main source of Mn in the Canada Basin while rivers contribute less. The vulnerability of biogeochemical supply mechanisms in the Arctic Ocean and subpolar seas to climate change is highlighted.
GLOBAL BIOGEOCHEMICAL CYCLES
(2022)
Article
Environmental Sciences
Yujun Liu, Yijun He
Summary: In recent years, the process of Atlantification in the warming Arctic Ocean has received increasing attention. This study focused on the Arctic Atlantic inflow zone (AAZ) and used reanalysis data and in-situ float data to investigate the impact of Arctic strong cyclones (ASCs) on the upper ocean. The findings show that ASCs disrupt the cold halocline layer, facilitate the transport of heat from the deep Atlantic Water, and intensify the intrusion of the Barents Sea Branch, thereby enhancing the process of Atlantification in the Arctic Ocean.
ENVIRONMENTAL RESEARCH LETTERS
(2023)
Article
Oceanography
Laramie T. Jensen, Jay T. Cullen, Sarah L. Jackson, Loes J. A. Gerringa, Dorothea Bauch, Rob Middag, Robert M. Sherrell, Jessica N. Fitzsimmons
Summary: Recent studies have revealed a unique linear relationship between dissolved copper (Cu) and nickel (Ni) in the Arctic Ocean, which differs from other oceans. This relationship is driven by river inputs and shows distinct distribution patterns in surface and deep waters. Cu and Ni mainly originate from rivers, but Ni is additionally influenced by biological processes and shelf sediment processes, while Cu is mostly affected by mixing.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2022)
Article
Multidisciplinary Sciences
Stefan Bengtson, Birger Rasmussen, Jian-Wei Zi, Ian R. Fletcher, James G. Gehling, Bruce Runnegar
Summary: Researchers have found that the animal burrows in the Paleoproterozoic metasedimentary rocks of the Mount Barren Group in southwestern Australia may predate the last metamorphic event in the region and were formed during an Eocene transgression. After this event, there was resilicification of the quartzites, filling the pore space with syntaxial quartz cement forming silcretes, making the rocks hard again and impenetrable to animal burrowing.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2021)
Article
Paleontology
Jaroslav Samanek, Lothar H. Vallon, Radek Mikulas, Michal Vachek
Summary: The old brickyard Velka nad Velickou in the Czech Republic provides a unique insight into a Eocene deep-sea ichno-assemblage dominated by sequestrichnia. The tracemaker Chondrites intricatus is seen frequently penetrating the Zoophycos brianteus trace fossil and occurring preferentially on the surface of Zoophycos spreiten, indicating the secondary use of food-stowing. This close relationship between Chondrites and Zoophycos supports the hypothesis of sequestrichnial behavior of Zoophycos producer. Other fossils such as Helminthopsis tenuis, Tubulichnium mediterranensis, Scolicia strozzii, ?Dactyloidites isp., Megagrapton irregulare, and Planolites isp. are also found in this studied locality.
ACTA PALAEONTOLOGICA POLONICA
(2022)
Article
Oceanography
Laramie T. Jensen, Nathan T. Lanning, Chris M. Marsay, Clifton S. Buck, Ana M. Aguilar-Islas, Robert Rember, William M. Landing, Robert M. Sherrell, Jessica N. Fitzsimmons
Summary: The surface waters of the Arctic Ocean include an important inventory of freshwater from rivers, sea ice melt, and glacial meltwaters. Different metals exhibit varying concentrations and impacts as colloids in different cryospheric reservoirs.
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS
(2021)
Article
Multidisciplinary Sciences
Olmo Miguez-Salas, Francisco J. Rodriguez-Tovar, Allan A. Ekdale, Stefanie Kaiser, Angelika Brandt, Andrew J. Gooday
Summary: This study reports the presence of Paleodictyon at Subarctic latitudes and depths over 4500 m for the first time. The new Paleodictyon specimens represent distinct ichnospecies that are associated with relatively eutrophic conditions in this region.
SCIENTIFIC REPORTS
(2023)
Article
Environmental Sciences
B. Rogalla, S. E. Allen, M. Colombo, P. G. Myers, K. J. Orians
Summary: Climate change is causing rising temperatures and an acceleration of the hydrological cycle, leading to increased river discharge and resulting in permafrost thaw, glacial melt, and a shift to a groundwater-dominated system in the Arctic. These changes impact the distribution of nutrients and biogeochemical constituents in the coastal regions of the Arctic Ocean. This study investigates the effects of terrestrial runoff on marine biogeochemistry in the Canadian Arctic Archipelago, using ocean modeling experiments to explore the transport and modification of waters from the Arctic Ocean to the North Atlantic. The findings highlight the influence of continental and glacial runoff on the geochemical composition of the marine environment, and the potential impacts on the marine ecosystem.
JOURNAL OF GEOPHYSICAL RESEARCH-BIOGEOSCIENCES
(2023)
Review
Geography, Physical
F. Garcia-Garcia, F. J. Rodriguez-Tovar, M. Poyatos-More, L. M. Yeste, C. Viseras
Summary: This study analyzed sedimentary structures in a 50 m-thick package of terrestrial organic debris-rich sandstone bodies alternating with burrowed siltstones in the Betic Cordillera, Spain. Two types of sandbodies were identified, and the study highlights the importance of ichnological analysis for understanding hyperpycnal flows. The findings suggest the need for multi-scale analysis focusing on trace fossils and physical sedimentary signatures to improve our understanding of river-derived sustained-flow turbidites.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geosciences, Multidisciplinary
M. Gabriela Mangano, Luis A. Buatois, Robert B. MacNaughton, Soren Jensen, Romain Gougeon, Alberto Marcos, Dean Meek, Laura Pinuela, Jose Carlos Garcia-Ramos
Summary: This study reevaluates the Cambrian trace fossil Psammichnites and reinterprets the previously named Taphrhelminthopsis circularis as a variant of Psammichnites gigas. The relationships between Psammichnites and other trace fossils commonly found in Cambrian shallow-marine strata are also discussed. Recommendations for renaming some trace fossils are provided. This documentation of the preservational variability of Cambrian Psammichnites is important for accurately estimating ichnodiversity levels during the Cambrian explosion and for stratigraphic correlation.
EARTH-SCIENCE REVIEWS
(2022)
Article
Geography, Physical
Malin E. Kylander, Anna Plikk, Johan Rydberg, Ludvig Lowemark, J. Sakari Salonen, Maria Fernandez-Fernandez, Karin Helmens
QUATERNARY RESEARCH
(2018)
Article
Geosciences, Multidisciplinary
Stefanie Kaboth-Bahr, Andre Bahr, Christian Zeeden, Samuel Toucanne, Frederique Eynaud, Francisco Jimenez-Espejo, Ursula Rohl, Oliver Friedrich, Joerg Pross, Ludvig Lowemark, Lucas J. Lourens
GEOPHYSICAL RESEARCH LETTERS
(2018)
Article
Geography, Physical
A. Kremer, R. Stein, K. Fahl, Z. Ji, Z. Yang, S. Wiers, J. Matthiessen, M. Forwick, L. Lowemark, M. O'Regan, J. Chen, I. Snowball
QUATERNARY SCIENCE REVIEWS
(2018)
Article
Geography, Physical
Jyh-Jaan Steven Huang, Kuo-Yen Wei, Ludvig Lowemark, Sheng-Rong Song, Chih-Kai Chuang, Tien-Nan Yang, Meng-Yang Lee, Yu-Be Chen, Chorng-Shern Horng, Kuo-Hang Chen, Teh-Quei Lee
QUATERNARY INTERNATIONAL
(2019)
Article
Geography, Physical
Ludvig Lowemark, Menno Bloemsma, Ian Croudace, J. Stephen Daly, Robin J. Edwards, Pierre Francus, Jennifer M. Galloway, Braden R. B. Gregory, Jyh-Jaan Steven Huang, Anna F. Jones, Malin Kylander, Ludvig Lowemark, Yangbing Luo, Suzanne Maclachlan, Christian Ohlendorf, R. Timothy Patterson, Christof Pearce, Jorn Profe, Eduard G. Reinhardt, Christian Stranne, Rik Tjallingii, Jonathan N. Turner
QUATERNARY INTERNATIONAL
(2019)
Article
Geography, Physical
Stefanie Kaboth-Bahr, Vianney Denis, Chih-Chieh Su, Matt O'Regan, Richard Gyllencreutz, Martin Jakobsson, Ludvig Lowemark
QUATERNARY INTERNATIONAL
(2019)
Editorial Material
Geography, Physical
Ian W. Croudace, Ludvig Lowemark, Rik Tjallingii, Bernd Zolitschka
QUATERNARY INTERNATIONAL
(2019)
Article
Geography, Physical
Ian W. Croudace, Ludvig Lowemark, Rik Tjallingii, Bernd Zolitschka
QUATERNARY INTERNATIONAL
(2019)
Article
Multidisciplinary Sciences
Jyh-Jaan S. Teven Huang, Sheng-Chi Lin, Ludvig Lowemark, Sofia Ya Hsuan Liou, Queenie Chang, Tsun-Kuo Chang, Kuo-Yen Wei, Ian W. Croudace
SCIENTIFIC REPORTS
(2019)
Article
Geosciences, Multidisciplinary
Matt O'Regan, Helen K. Coxall, Thomas M. Cronin, Richard Gyllencreutz, Martin Jakobsson, Stefanie Kaboth, Ludvig Lowemark, Steffen Wiers, Gabriel West
FRONTIERS IN EARTH SCIENCE
(2019)
Article
Multidisciplinary Sciences
Liangcheng Tan, Chuan-Chou Shen, Ludvig Lowemark, Sakonvan Chawchai, R. Lawrence Edwards, Yanjun Cai, Sebastian F. M. Breitenbach, Hai J. Cheng, Yu-Chen Chou, Helmut Duerrast, Judson W. Partin, Wenju Cai, Akkaneewut Chabangborn, Yongli Gao, Ola Kwiecien, Chung-Che Wu, Zhengguo Shi, Huang-Hsiung Hsu, Barbara Wohlfarth
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2019)
Article
Geosciences, Multidisciplinary
Amy Hsieh, Shahin E. Dashtgard, Pei-Ling Wang, Chorng-Shern Horng, Chih-Chieh Su, Andrew T. Lin, Romain Vaucher, Ludvig Lowemark
Summary: The Taiwan Western Foreland Basin was traditionally believed to have received sediment mainly from Eurasia until the late Pliocene-early Pleistocene. However, new research indicates that major sediment contributions from Taiwan occurred much earlier, and were closely related to the uplift and initial emergence of the Taiwan orogen. This study demonstrates that the Taiwan orogen became a significant source of sediment to the Western Foreland Basin during the Miocene-Pliocene transition, about two million years earlier than previously recognized.
Article
Environmental Sciences
Tsai-Wen Lin, Stefanie Kaboth-Bahr, Andre Bahr, Kweku Afrifa Yamoah, Chih-Chieh Su, Liang-Chi Wang, Pei-Ling Wang, Ludvig Loewemark
Summary: Human activities have caused significant changes in sedimentation processes and vegetation cover in lake catchments. However, the time needed for anthropogenically disturbed areas to return to their natural state through environmental protection programs is still uncertain. This study focuses on the Cueifong Lake catchment in Taiwan and uses a multi-proxy approach to investigate major environmental disturbances such as logging and forest fires. The results suggest that it may take more than 50 years for the sedimentary regime to fully recover from logging activities, while the vegetation composition may shift irreversibly towards an algae-dominant environment.
SCIENCE OF THE TOTAL ENVIRONMENT
(2023)
Article
Geosciences, Multidisciplinary
Amy I. I. Hsieh, Romain Vaucher, Ludvig Lowemark, Shahin E. Dashtgard, Chorng-Shern Horng, Andrew T. T. Lin, Christian Zeeden
Summary: This study evaluates how the evolving Taiwan orogen influences the preservation of astronomical climate forcing in the shallow-marine sedimentary strata of the Taiwan Western Foreland Basin. The findings show that long-term astronomical cycles were poorly preserved during the early stages of increased East Asian Summer Monsoon due to wave reworking. However, from 5.4 to 3.15 Ma, the development of the basin and the protection provided by Taiwan enhanced the preservation of astronomical climate variability.
PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY
(2023)
Article
Geology
Romain Vaucher, Antoine Dillinger, Amy I. Hsieh, Wen-Rong Chi, Ludvig Lowemark, Shahin E. Dashtgard
Summary: This paper reports on the sedimentary succession of the Pleistocene Cholan Formation in Taiwan, which provides insights into the deposition processes of storm-flood delta successions. The study reveals the occurrence of tropical cyclone beds and post-depositional deformation features, and highlights the differences in sedimentary structures compared to other storm-flood delta successions.
DEPOSITIONAL RECORD
(2023)