Article
Geology
Pedro A. Fernndez-Mendiola, Joanaitz Perez-Malo, Hugh G. Owen, Joaquin Garcia-Mond
Summary: The Aptian sedimentary deposits of the Castro Urdiales area in north Spain record a post-OAE1a episode of disoxia/anoxia. The lower to upper Aptian black lutites and marlstones of the Castro Urdiales area are correlated with other Aptian sections of the Basque-Cantabrian Basin and southeastern France. Prior to the oxygen deficient episode, glauconite-and-ostreid facies were deposited during the Gutiolo volcanic event. The volcanism correlates in part with the Cretaceous superplume eruptions.
CRETACEOUS RESEARCH
(2023)
Article
Geology
Arman Jafarian, Antun Husinec, Chengshan Wang, Xi Chen, Abdus Saboor, Yalin Li
Summary: This study investigates the Early Aptian Selli Oceanic Anoxic Event 1a (ca 120 Ma) by analyzing sedimentological, biostratigraphic, and carbon isotope data from the Kazhdumi Intrashelf Basin in Kazakhstan. It reveals the biotic, climatic, environmental, and geochemical perturbations associated with the burial of organic matter. The study highlights the significance of shallow carbonate-dominated intrashelf basins in recording carbon isotope and sea-level fluctuations and paleoenvironmental changes during global oceanic disturbances.
Article
Geography, Physical
C. N. Blok, J. Ineson, K. Anderskouv, A. Fantasia, E. Sheldon, N. Thibault, M. E. Jelby, T. Adatte, S. Bodin
Summary: The study conducted high-resolution clay-mineral assemblage analyses on a cored section in the Danish Central Graben, North Sea, revealing differences in climatic evolution during OAE-1a between the Tethyan and Boreal Realms, indicating a more complex weathering feedback mechanism during hyperthermal events.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geography, Physical
C. N. Blok, J. Ineson, K. Anderskouvc, A. Fantasia, E. Sheldon, N. Thibault, M. E. Jelby, T. Adatte, S. Bodin
Summary: This study explores the climatic evolution during the Early Cretaceous in the Boreal Realm of the Danish Central Graben, North Sea. The research findings suggest that there are differences in precipitation patterns between the Tethyan Realm and the Boreal Realm during the OAE-1a period, indicating a more complex weathering feedback mechanism during hyperthermal events than previously assumed.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Hanwei Yao, Xi Chen, Runsheng Yin, Stephen E. Grasby, Helmut Weissert, Xue Gu, Chengshan Wang
Summary: Geochemical studies have revealed that oceanic anoxic events (OAEs) are often associated with Large Igneous Province (LIP) volcanism. However, the link between OAE 1d and volcanism had lacked robust evidence until now. By analyzing mercury (Hg) concentrations and isotopic records, researchers found a volcanic Hg anomaly just prior to OAE 1d, consistent with increased sea surface temperatures and atmospheric CO2 levels. This suggests that the eruption of the central portion of the Kerguelen LIP may have driven the onset of OAE 1d through global environmental perturbations.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geology
Ying Nie, Xiugen Fu, Hengye Wei, Fei Lin, Shengqiang Zeng, Ahmed Mansour, Gang Zhou, Wenzhi Wang
Summary: High-resolution organic and inorganic geochemical data were used to reconstruct the paleoenvironmental and paleoclimatic conditions during the early Aptian Oceanic Anoxic Event (OAE 1a) in the Gucuo area of southern Tibet. The results showed a shift from oxic to suboxic conditions prior to and at the base of OAE 1a, indicating severe paleoenvironmental disturbance. The analysis of geochemical proxy indicators suggested a warm-humid climate and freshwater-dominated salinity conditions during this period.
CRETACEOUS RESEARCH
(2023)
Article
Geography, Physical
L. M. E. Percival, L. R. Tedeschi, R. A. Creaser, C. Bottini, E. Erba, F. Giraud, H. Svensen, J. Savian, R. Trindade, R. Coccioni, F. Frontalini, L. Jovane, T. A. Mather, H. C. Jenkyns
Summary: The study investigates the role of Large Igneous Province (LIP) activity in triggering the Early Aptian Oceanic Anoxic Event (OAE 1a) and emphasizes the importance of the Greater Ontong-Java Plateau (G-OJP). Globally consistent evidence of LIP activity during OAE 1a is indicated, but geographical variations in mercury trends were observed. The findings suggest that G-OJP emissions of mantle carbon were more likely to have played a major role in initiating OAE 1a than thermogenic volatiles associated with High Arctic LIP (HALIP).
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Geology
Nina M. Papadomanolaki, Niels A. G. M. van Helmond, Heiko Palike, Appy Sluijs, Caroline P. Slomp
Summary: In this study, the carbon cycle box model LOSCAR-P is used to quantify the impact of Caribbean large igneous province (LIP) volcanism and enhanced marine organic carbon burial on the carbon cycle perturbation during the Oceanic Anoxic Event 2 (OAE2). The results show that two pulses of volcanic carbon input are required to simulate the observed changes in delta C-13 and pCO2, and reduced LIP activity and carbon burial lead to pronounced pCO2 reductions.
Article
Geology
Xi Chen, Bradley B. Sageman, Hanwei Yao, Sheng'Ao Liu, Kaibo Han, Yi Zou, Chengshan Wang
Summary: This study revealed changes in zinc flux in a hemipelagic section in Tibet during the Cenomanian-Turonian Oceanic Anoxic Event 2, possibly related to climate change, volcanic activity, and terrigenous inputs.
Article
Geology
Yi Wang, Stephane Bodin, Jerzy S. Blusztajn, Clemens Ullmann, Sune G. Nielsen
Summary: The ongoing oceanic oxygen loss will have a profound impact on the distribution and density of life on Earth. However, drivers of the initiation and termination of global oceanic deoxygenation are poorly understood. New research reveals that in the mid-Cretaceous, there were three rapid global deoxygenation events that occurred after massive volcanism and were influenced by increased continental weathering under a warmer climate. The interactions of long-term climate change and short-term orbital modulation played a role in the termination of each deoxygenation interval.
Article
Geology
Jean-Francois Deconinck, Danny Boue, Francis Amedro, Francois Baudin, Ludovic Bruneau, Emilia Huret, Philippe Landrein, Jean-David Moreau, Anne Lise Santoni
Summary: In 2013, Andra drilled boreholes in the south-east of the Paris Basin to characterise Aptian and Albian clayey formations, revealing information about early Aptian 'Argiles a Plicatules' Formation. Through detailed biostratigraphy, sedimentology, clay mineralogy, and isotope geochemistry analyses, they found evidence of climate change and environmental evolution.
CRETACEOUS RESEARCH
(2021)
Article
Multidisciplinary Sciences
Hironao Matsumoto, Rodolfo Coccioni, Fabrizio Frontalini, Kotaro Shirai, Luigi Jovane, Ricardo Trindade, Jairo F. Savian, Junichiro Kuroda
Summary: During the mid-Cretaceous, the Earth experienced drastic environmental perturbations, mainly triggered by submarine volcanic activities. High-resolution Os isotopic records indicate that most of these events were associated with massive submarine volcanic episodes, but some minor events may have been caused by monsoonal activity.
NATURE COMMUNICATIONS
(2022)
Review
Geosciences, Multidisciplinary
David Cruset, Daniel Munoz Lopez, Jaume Verges, Mar Moragas, Irene Cantarero, Anna Trav
Summary: This study integrates classic and modern geochemical and geochronological datasets with the current tectonic knowledge of the Pyrenean fold belt and the Basque-Cantabrian Basin to discuss the fluid history in extensional and compressional sedimentary basins along the Iberian-Eurasian plate boundary. The research findings highlight the dominance of late Hercynian fluid systems by Carboniferous-early Permian magmatic intrusions and the occurrence of contact metamorphism processes during the Mesozoic extension. The Alpine compressional fluid history shows the increasing influence of meteoric fluids as the foreland basin became overfilled. Rating: 5/10.
EARTH-SCIENCE REVIEWS
(2023)
Article
Geography, Physical
Xiangyu Zhang, Shoujun Li, Xuxue Wang, Xiuli Zhao, Tiantao Yin
Summary: This study fills the gap in continental records of the early Aptian Oceanic Anoxic Event 1a(OAE 1a) by analyzing lacustrine facies in the East Asia continental margin. The proposed conceptual model illustrates the response of lake systems to OAE 1a, confirming the occurrence of ancient climate changes and carbon cycle disturbances in lacustrine systems.
GLOBAL AND PLANETARY CHANGE
(2021)
Article
Geosciences, Multidisciplinary
B. P. Smith, C. Kerans, W. W. Fischer
Summary: The deposition of marine carbonate rocks is influenced by climate and seawater chemistry. Platform drowning occurs when carbonate sedimentation slows or when siliciclastics replace carbonates. Deep-ocean anoxia reduces both dissolution and overproduction, leading to slower accumulation rates in shallow-water environments.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Geology
Jimmy de Rooij, Sybrand A. N. Lucassen, Charlotte Furer, Anne S. Schulp, P. Martin Sander
Summary: This study presents a detailed osteohistological analysis on Triceratops horridus and Triceratops cf. prorsus specimens, aiming to understand the growth and development of ceratopsids. The analysis reveals a distinct pattern of bone tissue growth in Triceratops limb elements, but also suggests that taxonomic ambiguity between Torosaurus and Triceratops cannot be solely resolved based on histological data.
CRETACEOUS RESEARCH
(2024)
Review
Geology
J. R. Ovando-Figueroa, J. A. Moreno-Bedmar, M. Company, J. A. Jacobo-Delgado
Summary: This article presents a review of ammonoid specimens from the Berriasian and Valanginian age in Zacatecas, Mexico. The study includes updated museographic information, new images, and 3D models of the specimens. Taxonomic identification has revealed six species and two genera. Stratigraphic range data suggests that the specimens belong to the uppermost upper Berriasian to lower Valanginian interval, with several biozones identified. Additionally, a paleobiogeographic analysis indicates a clear affinity with contemporaneous ammonoid assemblages from the Mediterranean region.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Jake Kotevski, Ruairidh J. Duncan, Adele H. Pentland, James P. Rule, Patricia Vickers-Rich, Thomas H. Rich, Erich M. G. Fitzgerald, Alistair R. Evans, Stephen F. Poropat
Summary: The cranial remains of non-avian theropod dinosaurs from the Cretaceous period in Australia are poorly understood. This study presents new evidence of non-mandibular cranial material, possibly belonging to the Megaraptoridae family, and contributes to the limited knowledge of Australian Cretaceous theropod cranial remains.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Josh Jenkins Shaw, Alexey Solodovnikov, Evgeny E. Perkovsky
Summary: A fossil of the monogeneric rove beetle subfamily Trichophyinae (genus Trichophya) has been discovered in the Upper Cretaceous Taimyr amber from northern Siberia. This finding indicates the morphological differences between ancient and modern Trichophya species groups. By comparing the morphology, distribution, and habitat requirements of extant species, the taxonomy, biogeography, and paleoecology of the Trichophya in Taimyr amber can be better understood.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Martin Kostak, Frank Wiese, Zuzana Kozlova, Adam Culka, Martin Mazuch, Martin Soucek
Summary: A well-preserved fossil of an upper Cretaceous acanthoceratoid ammonite has been discovered in the Bohemian Cretaceous Basin, providing important insights into the jaw anatomy of these extinct organisms.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Gustavo Santiago, Marcelo de Araujo Carvalho, Renato Rodriguez Cabral Ramos, Sandro Marcelo Scheffler
Summary: The Santa Marta Formation in the Antarctic Peninsula is an important sedimentary sequence that provides insights into paleoenvironmental changes. The distribution of sedimentary organic matter reveals three distinct palynofacies associations and shows a progressive transgression from terrestrial to marine environments.
CRETACEOUS RESEARCH
(2024)
Article
Geology
B. J. Vazquez, D. Castanera, B. Vila
Summary: In Europe, the fossil record of sauropods in the uppermost Cretaceous is mainly found in Spain, France, and Romania. Recently, a significant discovery of titanosaurs' teeth was made in Els Nerets, Spain, which contains the largest tooth sample from the Late Cretaceous in Europe. The teeth show distinct characteristics but cannot be attributed to any known European species. Based on tooth morphology and wear facets distribution, a new taxon is proposed.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Youssef S. Bazeen, Walid G. Kassab, El Sayed M. Moneer, Gebely A. Abu El-Kheir, Mohamed K. Abdelgawad, Haitham M. Ayyad
Summary: This study investigates the Maastrichtian-Danian succession in the Abu Minqar section of the Western Desert of Egypt, using an integrated analysis of biostratigraphy and chemostratigraphy. The results suggest that regional tectonics played a substantial role in the depositional history and paleoenvironmental circumstances of the southern Tethys margin.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Fernando R. Rios, Ana M. P. Mizusaki, Rualdo Menegat, Isaque C. Rodrigues
Summary: This study examines the temporal and spatial relationships between fluvio-aeolian, aeolian, and volcanic systems in the southernmost part of the Parana Basin during the Late Jurassic and Early Cretaceous. By analyzing facies and architectural elements, the evolution of the volcano-sedimentary record is reconstructed.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Antonio M. Casas, Arsenio Munoz, Alberto Tella, Carlos L. Liesa
Summary: This work proposes the application of magnetic surveying to study the cyclicity in sedimentary basins. Through measuring the total magnetic field and vertical magnetic gradient, the short-wavelength magnetic anomalies associated with the sedimentary sequence can be analyzed, providing information about the magnetic susceptibility and magnetic remanence of different sedimentary units. The cyclostratigraphic analysis reveals the existence of various cycles and enables the dating of the basin fill, offering new constraints for basin evolution.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Ottilia Szives, Josep A. Moreno-Bedmar, Beatriz Aguirre-Urreta, Miguel Company, Camille Frau, Mikel Lopez-Horgue, Antoine Pictet, Izabela Ploch, Christian Salazar, Ricardo Barragan, Jean -Louis Latil, Jens Lehmann, Stephane Reboulet, Emmanuel Robert
Summary: The 7th meeting of the IUGS Lower Cretaceous Ammonite Working Group discussed important changes in the geological age classification, including adjustments and improvements to the upper Tithonian-Berriasian, upper Aptian, and Albian stages. The meeting also discussed the Valanginian and Hauterivian stages, and provided discussions on zonal indices and units, emphasizing the use of interval zones and subzones.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Felix Schlagintweit, David Gercar, Bostjan Rozic
Summary: A mixed assemblage of planktonic and benthonic foraminifera has been found in the Lower Flyschoid Formation in the western part of the Slovenian Basin. These findings provide valuable insights into the biostratigraphy and paleogeographic configuration of the region during the Early to Middle Cretaceous.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Arkaprava Mukhopadhyay, Debarati Chattopadhyay, Arghya Poddar, Ranita Saha, Sachin Patil, Tushar Sonkar, Sujoy Das, Rudranil Basak, Shubhabrata Paul, Arindam Roy
Summary: Predator-prey interaction exerts significant selection pressure on the evolutionary pathways of both parties. This research presents a new dataset of gastropod drilling predation on molluscan prey from the Upper Cretaceous, highlighting the influence of drilling predation during this period. The study utilizes a hybrid method of surface sampling without physically breaking the host rock. Findings suggest that drilling predation was an established form of predation during the Late Cretaceous, yet remains understudied.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Dany Azar, Andre Nel
Summary: Lebanoaktassia curiosa is a new genus and species of strange dragonfly, representing the first Gondwanan species of the family Aktassiidae. It was found in Hjoula, Lebanon, along with two endemic dragonfly families, suggesting a possible connection to an island insular system in the Early Cretaceous.
CRETACEOUS RESEARCH
(2024)
Article
Geology
Pablo M. Villegas, A. Martin Umazano, Marcelo Krause, Mariana Brea
Summary: Conifer fossil woods from the Campanian Puntudo Chico Formation were studied, confirming the presence of Brachyoxylon currumillii and the introduction of Cupressinoxylon sp. cf. C. artabeae in the formation. The new specimens of Podocarpoxylon mazzonii suggest that this taxon is common in the Cretaceous to Eocene floristic assemblages. The growth-ring analysis of these fossil trees indicates their development under temperate and humid conditions, with slight sensitivity from year to year and a terminal event representing a cessation or retardation of cambial activity. Other paleoclimatic proxies suggest a temperate-warm and humid depositional environment with some semi-arid events in the Puntudo Chico Formation.
CRETACEOUS RESEARCH
(2024)