Article
Multidisciplinary Sciences
Francesca Galasso, Ulrich Heimhofer, Elke Schneebeli-Hermann
Summary: Based on the analysis of pollen and spores from fossil plants in Cassis, France, it is found that plant reproduction was unaffected during the Cenomanian/Turonian boundary interval.
SCIENTIFIC REPORTS
(2023)
Article
Geography, Physical
Ruixiang Zhai, Zhiyu Zeng, Ruiling Zhang, Weiqi Yao
Summary: The Cretaceous Oceanic Anoxic Event 2 (OAE2) is characterized by severe marine anoxia, rising sea surface temperature, enhanced marine biological productivity, and widespread occurrence of organic-rich black shales. The temporal and spatial distribution of oceanic oxygen loss is not yet understood due to a lack of global records. This review summarizes marine nitrogen and sulfur isotope data sets from worldwide locations, indicating that anoxic waters initially developed on the southern edge of the proto-North Atlantic before spreading to open oceans and epicontinental seas at the onset of OAE2. Regional differences in marine redox states are primarily controlled by distinct nutrient levels and circulation structures. This study provides insights into the evolutionary history of ocean deoxygenation and biogeochemical cycles during the past hyperthermal event, with implications for future global warming.
GLOBAL AND PLANETARY CHANGE
(2023)
Article
Geosciences, Multidisciplinary
A. Hagset, S-A Grundvag, B. Badics, R. Davies, A. Rotevatn
Summary: Extensive rifting and deposition of sediments have buried the Upper Jurassic organic-rich shales in the mid-Norwegian margin, making them overmature and spent. It is difficult to identify alternative organic-rich units due to lack of well control, variable seismic quality, and deep burial depth. However, this study combines seismic data, well logs, and Rock-Eval data to find alternative organic-rich units in the Cretaceous succession on the Halten Terrace and the Voring Basin.
MARINE AND PETROLEUM GEOLOGY
(2023)
Article
Geology
Karima Ouikene, Delphine Desmares, Silvia Gardin, Fatiha Benkherouf-Kechid, Jeremie Bardin
Summary: A multi-proxy approach was used to investigate two sections in the Tellian Atlas (Algeria) in order to establish a precise stratigraphic scheme and clarify climatic events. The results showed that the Sour el Ghozlane section provided a good record of the Oceanic Anoxic Event 2 (OAE2), while the Sidi Nadji section indicated a hiatus. The study also highlighted the significance of the left-coiled morphotype of Muricohedbergella delrioensis in climate change events.
CRETACEOUS RESEARCH
(2022)
Article
Geosciences, Multidisciplinary
Garmia Bekhouch, T. Markham Puckett, Abdelkader Khiari, Muriel Rault Djerrab, Asma Meguelatti, Haythem Dinar
Summary: This study combines information on Cenomanian and Turonian ostracods and associated planktonic foraminifera in North Africa and the Middle East, providing a comprehensive scale for stratigraphic analysis. The study reveals continuous faunal turnover and steady rates of evolution and extinction in the region, with no mass extinction events.
JOURNAL OF AFRICAN EARTH SCIENCES
(2023)
Article
Geology
Lorenzo Consorti, Felix Schlagintweit
Summary: The Cenomanian-Turonian boundary marked a time of biotic changes shaping the diversity of larger foraminifera, with some taxa showing stratigraphic occurrences before and after the CTB. The discovery of Vandenbroeckia causae sp. nov in the Cenomanian suggests that this genus survived the extinction event, reappearing in the Upper Cretaceous with a new specific status.
CRETACEOUS RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Matthew M. Jones, Bradley B. Sageman, David Selby, Brian R. Jicha, Brad S. Singer, Alan L. Titus
Summary: The study successfully quantifies the duration of the hiatus at the base of OAE2 in the North American Western Interior Basin using new radiometric dating and chemostratigraphic research, advancing the chronostratigraphical understanding of the Cenomanian-Turonian boundary and showing the conformity of geochemical anomalies at the onset of OAE2. The rapid onset of OAE2 may be linked to large igneous province volcanism, with the addition of CO2 potentially driving changes in marine carbonate chemistry, as indicated by the new isotopic data.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2021)
Article
Paleontology
Mohsen Yazdi-Moghadam, Felix Schlagintweit
Summary: A new species of orbitolinid, Iraqia ultima, is described from the middle Cenomanian of Iran. Comparisons with other dictyoconids from the same formation are made, and comments on the type-material of the Lower-?mid-Cretaceous type-species Iraqia simplex are provided. The study suggests an increase in diversity of the Dictyoconinae and a decrease in diversity of the Orbitolininae during the Cenomanian.
PALAEONTOGRAPHICA ABTEILUNG A-PALAOZOOLOGIE-STRATIGRAPHIE
(2022)
Article
Geography, Physical
Maria Rose Petrizzo, David K. Watkins, Kenneth G. MacLeod, Takashi Hasegawa, Brian T. Huber, Sietske J. Batenburg, Tomonori Kato
Summary: The study provides insights into the paleoceanographic changes across the Cenomanian-Turonian boundary interval and the Oceanic Anoxic Event 2 (OAE 2) at southern high latitudes, by analyzing planktonic foraminiferal population dynamics, benthic foraminiferal and radiolaria distributions, and delta C-13 and delta O-18 measurements of carbonate. Samples were collected from IODP Expedition 369 Site U1516 in the Mentelle Basin, showing consistent records of planktonic foraminifera across the OAE 2 interval. The sediments indicate eutrophic conditions and ecological shifts during this time period, with implications for paleoceanographic settings and sea surface temperature variations.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Agronomy
Marcin Becher, Miroslaw Kobierski, Krzysztof Pakula, Dawid Jaremko
Summary: The secondary transformation of organic matter in drained peatlands of the temperate climate zone has a significant effect on the total mercury content and stock in soils. This research is of great importance for soil monitoring and planning the restoration of peatlands.
Article
Environmental Sciences
Zhanyong Wang, Ruhui Cao, Bai Li, Ming Cai, Zhong-Ren Peng, Guohua Zhang, Qingchang Lu, Jinpu Zhang, Kai Shi, Yonghong Liu, Hui Zhang, Xisheng Hu
Summary: This study investigated the vertical distribution of atmospheric pollutants at night in Guangzhou, finding that PM2.5, PM1.0, and BC decreased with altitude, while O3 was positively correlated. External air masses with high pollutant concentrations significantly affected PM1.0 and PM2.5 levels. RH and BC accumulation were found to be significant factors influencing the intensity of secondary aerosols. These findings provide insights into measures to prevent and control nighttime particulate matter pollution.
ENVIRONMENTAL RESEARCH
(2023)
Article
Geosciences, Multidisciplinary
Jianpeng Wang, Jonathan Redfern, Luc G. Bulot, Kevin G. Taylor
Summary: The Ocean Anoxic Event II (OAE2) is a significant global event associated with organic carbon preservation. Carbon isotopic analysis and sedimentary facies analysis in the Agadir Basin, Morocco, provide a refined correlation of the OAE2 interval.
JOURNAL OF AFRICAN EARTH SCIENCES
(2023)
Article
Geology
Alessandro Menini, Emanuela Mattioli, Jorge E. Spangenberg, Bernard Pittet, Guillaume Suan
NEWSLETTERS ON STRATIGRAPHY
(2019)
Review
Geosciences, Multidisciplinary
Jorge Ferreira, Emanuela Mattioli, Baptiste Sucheras-Marx, Fabienne Giraud, Luis V. Duarte, Bernard Pittet, Guillaume Suan, Auguste Hassler, Jorge E. Spangenberg
EARTH-SCIENCE REVIEWS
(2019)
Article
Geosciences, Multidisciplinary
B. van de Schootbrugge, A. J. P. Houben, F. E. Z. Ercan, R. Verreussel, S. Kerstholt, N. M. M. Janssen, B. Nikitenko, G. Suan
GEOLOGICAL MAGAZINE
(2020)
Article
Geosciences, Multidisciplinary
H. Baghli, E. Mattioli, J. E. Spangenberg, M. Bensalah, F. Arnaud-Godet, B. Pittet, G. Suan
Article
Geology
P. Vincent, A. -S. Grosjean, D. Bert, J. Ferreira, B. Sucheras-Marx, G. Suan, G. Guinot, V. Perrier, K. Janneau, J. -M. Brazier, E. Sarroca, M. Guiomar, J. E. Martin
CRETACEOUS RESEARCH
(2020)
Article
Geology
Tamas Muller, Hana Jurikova, Marcus Gutjahr, Adam Tomasovych, Jan Schloegl, Volker Liebetrau, Lufs V. Duarte, Rastislav Milovsky, Guillaume Suan, Emanuela Mattioli, Bernard Pittet, Anton Eisenhauer
Article
Geology
Alessandro Menini, Emanuela Mattioli, Arnauld Vincon-Laugier, Guillaume Suan
Summary: Based on new biostratigraphic data, we propose a high-resolution chronostratigraphic subdivision to assess the succession of biostratigraphic events during the Paleocene-Eocene transition and correlate them with the carbon isotope curve. This is important for understanding the occurrence and recovery process of the Paleocene-Eocene Thermal Maximum (PETM) global warming event.
NEWSLETTERS ON STRATIGRAPHY
(2022)
Article
Geosciences, Multidisciplinary
Peter L. Falkingham, Susannah C. R. Maidment, Jens N. Lallensack, Jeremy E. Martin, Guillaume Suan, Lesley Cherns, Cindy Howells, Paul M. Barrett
Summary: The article describes the rare Late Triassic large tetrapod tracks found on the shoreline near Penarth, south Wales, UK, as well as the digital mapping of site erosion during 2009-2020 using historical photogrammetry. The loss of over 1 meter of the surface exposure and the deterioration of the tracks highlight the transient and vulnerable nature of fossil resources, emphasizing the importance of efficient data collection.
GEOLOGICAL MAGAZINE
(2022)
Article
Geography, Physical
Hicham Baghli, Emanuela Mattioli, Jorge E. Spangenberg, Wolfgang Ruebsam, Lorenz Schwark, Mustapha Bensalah, Abbes Sebane, Bernard Pittet, Pierre Pellenard, Guillaume Suan
Summary: This study investigates the profound environmental changes that occurred during the Early Jurassic period in Northern Gondwana. By analyzing calcareous nannofossil assemblages and stable carbon and nitrogen isotopes from three sections in Northwestern Algeria, the study reveals the local environmental conditions during the Toarcian greenhouse climate. The results show that thermal stratification of water masses during this period led to hyper-oligotrophy and reduced productivity in shallow waters.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
David B. Kemp, Guillaume Suan, Alicia Fantasia, Simin Jin, Wenhan Chen
Summary: In this study, total organic carbon (TOC) data from 67 lower Toarcian sections were compiled to reconstruct the pattern of organic enrichment during the early Toarcian oceanic anoxic event (T-OAE). The findings suggest that redox conditions and sedimentation rates were major controls on organic enrichment and burial rates. Globally, there was a significant increase in TOC at most sites during the T-OAE.
EARTH-SCIENCE REVIEWS
(2022)
Article
Paleontology
Nicolas Pige, Guillaume Suan, Eddy Buiron, Vincent J. Langlois, Alyssa Mehir, Arnauld Vincon-Laugier, Emanuela Mattioli
Summary: The Paleocene-Eocene period experienced several hyperthermal events caused by the injection of greenhouse gases, with the most well-known being the PETM. These events had a significant impact on planktonic organisms, particularly calcareous nannoplankton. The accumulation of calcite platelets from calcareous nannoplankton in deep-sea sediments is crucial for understanding carbon budgets during hyperthermal events.
MARINE MICROPALEONTOLOGY
(2023)
Article
Ecology
Nicolas Seon, Romain Amiot, Guillaume Suan, Christophe Lecuyer, Francois Fourel, Fabien Demaret, Arnauld Vincon-Laugier, Sylvain Charbonnier, Peggy Vincent
Summary: The strategies used by marine vertebrates to regulate body temperature can lead to regional variations. By analyzing the oxygen isotope composition, researchers have discovered that different fish and dolphin species have variations in bone temperature. This provides important insights for studying the thermophysiologies of both extant and extinct organisms.
Article
Geosciences, Multidisciplinary
Thomas Letulle, Guillaume Suan, Mathieu Daeron, Mikhail Rogov, Christophe Lecuyer, Arnauld Vincon-Laugier, Bruno Reynard, Gilles Montagnac, Oleg Lutikov, Jan Schlogl
Summary: Periods of high atmospheric CO2 levels in the past were associated with high polar temperatures and reduced latitudinal gradients. This study reconstructs marine temperatures during the Early Jurassic using isotope analysis of mollusc shells, showing that polar temperatures were 10-20 degrees Celsius higher than present, with reduced latitudinal gradients. These findings provide important constraints for modeling Jurassic temperatures and suggest that high climate sensitivity has been a hallmark of greenhouse climates for at least 180 million years.
CLIMATE OF THE PAST
(2022)
Article
Geochemistry & Geophysics
V Balter, J. E. Martin, T. Tacail, G. Suan, S. Renaud, C. Girard
GEOCHEMICAL PERSPECTIVES LETTERS
(2019)