Article
Geology
Stefan Jozsa, Eiichi Setoyama, Halasova Eva, Stefan Nagy
Summary: A diverse and abundant assemblage of deep-water agglutinated foraminifera has been discovered in the Central Western Carpathians. These foraminifera show changes in response to trophic regime shift and decreasing oxygenation within a relatively short time-series.
CRETACEOUS RESEARCH
(2023)
Article
Paleontology
Diego Pinzon, Guillermo Rodriguez, Daniel Rincon-Martinez, Mercedes B. Prampard, Sandra Restrepo, Barbara Vento, Jhonatan Martinez, G. Raquel Guerstein, Juan P. Perez Panera, Felipe De la Parra, Maria Carolina Vargas
Summary: Palynological analysis of Neogene marine stratigraphic sequences in tropical latitudes, focused on lower to middle Miocene deposits in the Caribbean, reveals detailed chronostratigraphic framework and paleoenvironmental evolution. Micropaleontological data indicate four paleoceanographic settings defined by changes in surface water productivity, strongly related to paleoceanographic reorganization and input of terrigenous organic matter.
MARINE MICROPALEONTOLOGY
(2022)
Article
Geology
Brian T. Huber, Nataliya A. Tur, Jean Self-Trail, Kenneth G. MacLeod
Summary: The study analyzed the distribution of well-preserved and diverse planktonic foraminifera and calcareous nannofossils over the past 10 million years in the western subtropical North Atlantic. Through age models constructed based on foram, nannofossil, and magnetic polarity datum events, reliable temporal correlation framework was established for the sites, enabling comparisons of species richness and abundance among sites. The study also revealed significant extinction events and hiatuses at specific time intervals linked to global warming events and changes in deep-water circulation patterns.
CRETACEOUS RESEARCH
(2022)
Article
Geology
Fabio Lamm, Francisco Henrique de Oliveira Lima, Cleber Fernandes Alves, Ismar de Souza Carvalho
Summary: The biostratigraphy of the Aptian-Albian interval using calcareous nannofossils has been continuously developed and applied. However, the scarcity of complete marine sections and taxonomic ambiguities pose challenges in stratigraphic studies of this interval. The Poggio le Guaine section in central Italy offers a unique opportunity with a complete and undisturbed sedimentary succession of the Aptian-Albian interval. This study aims to provide a detailed biostratigraphic zonation, calibrate it with previous works, and discuss important bioevents.
CRETACEOUS RESEARCH
(2023)
Article
Geology
Dario Sciunnach, Fabrizio Tremolada, Isabella Premoli Silva, Giancarlo Scardia
Summary: The middle Eocene Cibrone Formation in Brianza is an important stratigraphic record for understanding the tectonic evolution of the Alpine range. By analyzing turbidite arenites and using biostratigraphy, a possible vertical compositional trend within the formation was identified, along with the presence of the NP17 nannofossil Zone. The variable arenite compositions suggest contributions from different source areas.
RIVISTA ITALIANA DI PALEONTOLOGIA E STRATIGRAFIA
(2023)
Article
Geography, Physical
Raquel Bryant, R. Mark Leckie, Timothy J. Bralower, Matthew M. Jones, Bradley B. Sageman
Summary: Oceanic Anoxic Event 2 (OAE2) occurred in the latest Cenomanian and affected the global carbon cycle. Research in the southwestern edge of the seaway during OAE2 in Carthage, New Mexico, USA reveals distinct environmental changes and high productivity conditions in the marine ecosystem.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2021)
Article
Geography, Physical
Yi Zhang, Xuan Liu, David K. Watkins, Mauro Daniel Rodrigues Bruno, Hanwei Yao, Kaibo Han, Huifang Guo, Shuaipeng Zhu, Xi Chen
Summary: Based on the study of the Nirang section in the Tethys Himalayas, it is found that the sea surface temperature in the eastern Tethys during the Cretaceous Period underwent significant changes, including both short-term and long-term warming and cooling events. The northward drift of the Indian continent towards the equator is likely responsible for the sustained warmth in the Tethys Himalayas.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2023)
Article
Geosciences, Multidisciplinary
Peter Lunt, Xiwu Luan
Summary: This review examines the taxonomic inconsistencies of the Cenozoic larger foraminifera in SE Asia and discusses the confusion over concepts of evolution, migration, radiation, and extinction. The study suggests that the larger foraminifera populations in the region were more homogeneous than previously believed, with slow morphological radiation and multiple extinctions. The extinctions coincide with tectonic events in SE Asia and may have been caused by global climatic changes.
JOURNAL OF EARTH SCIENCE
(2022)
Article
Geology
E. Wolfgring, M. Wagreich, J. Hohenegger, K. Boehm, J. Dinares Turell, S. Gier, B. Sames, C. Spoetl, S. Jin
Summary: This study examined the cyclostratigraphy and paleoenvironments of pelagic deposits of the northwestern Tethys in the Upper Cretaceous Postalm section in Austria. The section displays rhythmic deposits from Santonian to late Campanian age, with distinct transitions and characteristics identified through biostratigraphy and isotope stratigraphy. The analysis of proxies in the upper section part revealed cycles spanning mid to upper Campanian, providing valuable insights into the geological history of the region.
CRETACEOUS RESEARCH
(2021)
Article
Paleontology
Cesare Andrea Papazzoni, Beatrice Fornaciari, Luca Giusberti, Michela Simonato, Eliana Fornaciari
Summary: Three key Paleocene deep-sea sections in northern Italy contain calciturbiditic, larger foraminifera-bearing beds from shallow water. The reconstructed Southern Alps record allows correlation of shallow benthic and calcareous nannofossil zones, proposing four new Shallow Benthic Paleocene zones based on larger foraminiferal biohorizons. The study reveals a fast recovery of foraminiferal complexity after the K/Pg crisis.
Article
Geology
Felix Schlagintweit
Summary: The translated passage discusses the evolution and extinctions of larger benthic foraminifera with conical tests of the families Orbitolinidae and Coskinolinidae. It highlights the reduced taxonomic diversity of Orbitolinidae in the Late Cretaceous, with only ten genera present. The survival of Dictyoconus Blanckenhorn from the mass extinction event at the K-Pg boundary is also noted.
NEWSLETTERS ON STRATIGRAPHY
(2022)
Article
Geosciences, Multidisciplinary
Saeedeh Senemari
Summary: This study investigates the Gurpi Formation in the northeast of Izeh, southwestern Iran. Biostratigraphy analysis was used to determine the age range of the formation and identify several significant changes, which may indicate environmental variations during the Late Cretaceous-Paleogene transition in the eastern Neo-Tethys domain.
JOURNAL OF EARTH SCIENCE
(2022)
Article
Geology
Arianna V. Del Gaudio, Werner E. Piller, Gerald Auer, Walter Kurz
Summary: The Izu-Bonin-Mariana arc-system in the NW Pacific is an intensively studied convergent margin that contains active serpentinite mud volcanism. International Ocean Discovery Program conducted drilling expeditions to obtain samples from three serpentinite mud volcanoes in the Mariana region, providing valuable information on the latest phase of seamount activity and changes in sedimentation rates.
NEWSLETTERS ON STRATIGRAPHY
(2022)
Article
Geography, Physical
Sherif Farouk, Chuanzhen Ren, Ahmed Abdeldaim, Ahmad Salama, Huaichun Wu, Khaled El-Kahtany, Amr S. Zaky
Summary: The study explores the astronomical forced sedimentation in Pliocene strata in the Mediterranean Sea using well logs and paleontological data. A floating astronomical time scale is established for the first time in Egypt, providing more reliable age constraints on the evolution of paleoclimate and paleoenvironment in the southeastern Mediterranean area since the Pliocene.
GLOBAL AND PLANETARY CHANGE
(2022)
Article
Geology
Vicent Vicedo, Raquel Robles-Salcedo
Summary: A taxonomical study of larger rotaliid foraminifera found in the Upper Cretaceous deposits in SE Spain has been conducted. The study identified five new species and two new genera, and highlighted the usefulness of this foraminiferal group for regional biostratigraphy.
CRETACEOUS RESEARCH
(2022)
Article
Geography, Physical
Szabolcs-Attila Kovecsi, Gyorgy Less, George Ples, Raluca Bindiu-Haitonic, Antonino Briguglio, Cesare Andrea Papazzoni, Lorand Silye
Summary: Extensive high-resolution palaeontological, stratigraphic and sedimentological data offer a new and comprehensive view of the genesis and evolution of the most extended Eocene nummulitic accumulation in the northern Neotethyan realm. Different assemblages dominated by N. beaumonti and N. perforatus reflect the interplay between the paleoenvironment and the ecological preferences of the two Nummulites species.
PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY
(2022)
Article
Geosciences, Multidisciplinary
Margot J. Cramwinckel, Robin van der Ploeg, Niels A. G. M. van Helmond, Niels Waarlo, Claudia Agnini, Peter K. Bijl, Annique van der Boon, Henk Brinkhuis, Joost Frieling, Wout Krijgsman, Tamsin A. Mather, Jack J. Middelburg, Francien Peterse, Caroline P. Slomp, Appy Sluijs
Summary: This study evaluates the sedimentary and geochemical expression of the mid-Eocene climatic optimum in the northern Peri-Tethys region. The findings suggest a regional decoupling between ocean warming and deoxygenation, highlighting the role of regional tectonics in causing basin restriction and anoxia. The study also emphasizes the importance of the interplay between global climate and regional oceanic gateway evolution in determining local climate and oceanographic change.
GEOLOGICAL SOCIETY OF AMERICA BULLETIN
(2022)
Article
Geosciences, Multidisciplinary
Cesare A. Papazzoni, Barbara Cavalazzi, Maria Franca Brigatti, Sorin Filipescu, Frederic Foucher, Luca Medici, Frances Westall, Annalisa Ferretti
Summary: The middle Eocene ironstone of the Transylvanian Basin in Romania provides new insights into the genesis and paleoenvironmental significance of ferruginous ooids. Through an integrated analysis using Environmental Scanning Electron Microscopy, Micro-X-ray Diffraction, and Raman spectroscopy, the ooids were chemically and mineralogically characterized. The presence of large foraminifera within a matrix dominated by millimetric Fe-ooids suggests the existence of ferruginous bottom waters in the Eocene tropical/sub-tropical shallow-marine settings. The limited iron source area indicates that local events could trigger iron ooidal deposition throughout the Phanerozoic.
Article
Geology
David J. King, Bridget S. Wade, C. Giles Miller
Summary: Planktonic foraminifera exhibit either sinistral or dextral coiling. The prevalence of coiling direction can change within morphospecies over time. Despite known preferential coiling directions in many species, no coiling shifts have been applied beyond the late Miocene. This study investigates selected Miocene species and confirms a coiling shift in the mid Miocene at approximately 15 Ma.
NEWSLETTERS ON STRATIGRAPHY
(2023)
Article
Geology
Giovanni Serafini, Erin E. Maxwell, Miriam Cobianchi, Luca Borghi, Cesare Andrea Papazzoni, Guido Roghi, Luca Giusberti
Summary: This paper describes a forgotten fossil, V7158, from the Verona Natural History Museum in Italy. Through analysis of morphology, taxonomy, taphonomy, and age determination, it is determined that the fossil belongs to the Late Jurassic ichthyosaur. Despite being fragmentary, the specimen is remarkably well preserved histologically, which is uncommon for its taphonomic regime.
ITALIAN JOURNAL OF GEOSCIENCES
(2023)
Article
Geochemistry & Geophysics
Romi Nambiar, Hagar Hauzer, William R. Gray, Michael J. Henehan, Laura Cotton, Jonathan Erez, Yair Rosenthal, Willem Renema, Wolfgang Mueller, David Evans
Summary: Seawater chemistry plays a crucial role in the incorporation of trace elements into marine calcifying organisms' shells. Variations in seawater's major ion chemistry can be used to trace past geological processes. This study examines the influence of oceanographic parameters on the incorporation of potassium into foraminiferal calcite, and explores the potential of using K/Ca ratios as indicators of past changes in seawater composition. The results show that temperature, salinity, and pH have no significant effect on K incorporation, but seawater's calcium concentration does.
GEOCHIMICA ET COSMOCHIMICA ACTA
(2023)
Article
Geology
Rachel Wai Ching Chu, Moriaki Yasuhara, Karoline Myrvang Riise, Hirofumi Asahi, Huai-Hsuan May Huang, Laura J. Cotton, Yuanyuan Hong, Tine L. Rasmussen
Summary: We reconstructed the history of methane seepage activity during the late Quaternary and examined the faunal response to deglacial climatic changes by analyzing fossil ostracode fauna paired with benthic foraminiferal δ13C values. The study found that the presence of the ostracode species Rosaliella svalbardensis in sediment assemblages was closely related to the intensity of methane seepage, while changes in other taxa were more influenced by global climate changes. Therefore, Rosaliella svalbardensis has the potential to be a useful proxy for past methane release.
Article
Multidisciplinary Sciences
Katherine A. Crichton, Jamie D. Wilson, Andy Ridgwell, Flavia Boscolo-Galazzo, Eleanor H. John, Bridget S. Wade, Paul N. Pearson
Summary: Paleontological reconstructions show that plankton in the deep-dwelling 'twilight zone' during warm periods of the last 66 million years were less abundant and diverse, and lived closer to the surface. This is due to temperature's effect on the rate of organic matter breakdown, which is faster at warmer temperatures. Our study using an Earth system model reveals that anthropogenic warming could have significant impacts on carbon cycling and twilight zone ecology, leading to widespread ecological disruption by 2100 without strong emissions mitigation.
NATURE COMMUNICATIONS
(2023)
Article
Paleontology
Raef Minwer-Barakat, Arnau Bolet, Pere Anadon, Laia Alegret, Ainara Badiola, Alejandro Blanco, Laura Cotton, Joan Femenias-Gual, Marc Furio, Marc Godinot, Salvador Moya-Sola, Pablo Pelaez-Campomanes, Josep Sanjuan, Judit Marigo
Summary: The Pontils fossil site in the Ebro Basin is an important locality for studying the transition from land to sea during the middle Eocene. Intensive sampling conducted recently has yielded diverse vertebrate remains, including abundant primate fossils. The age of the site has been determined to be between 39.58 and 41 Ma, making it a valuable reference section for studying marine and continental biostratigraphy during this time period.
JOURNAL OF VERTEBRATE PALEONTOLOGY
(2023)
Article
Geology
Giovanni Serafini, Jacopo Amalfitano, Silvia Danise, Erin E. Maxwell, Riccardo Rondelli, Cesare A. Papazzoni
Summary: This article provides a detailed description of the remains of a large ichthyosaur and a medium-sized anacoracid shark found in deep-water sediments in Northern Italy. The two fossils share a common taphonomic history and offer valuable insights into the pelagic vertebrates in a Mesozoic abyssal plain.
Article
Geology
Umid Kakemem, Laura J. Cotton, Nasrin Hadavand-Khani, Roghayeh Fallah-Bagtash, Nicolas Thibault, Kresten Anderskouv
Summary: The Taleh Zang Formation in the Lurestan Basin, SW Iran, contains large platform carbonates rich in large benthic foraminifera. The formation is dominated by alveolinids and various other genera of foraminifera, along with minor components such as calcareous algae, gastropods, echinoids, and bivalves. Biostratigraphy analysis indicates that the formation is of early Ypresian age and was deposited in a shallow water environment within the euphotic zone. The presence of intervals displaying shallowing and deepening trends suggests that regional tectonics and eustasy played significant roles in the formation of these deposits.
SEDIMENTARY GEOLOGY
(2023)
Article
Paleontology
Laura J. Cotton
Summary: A research study has revealed the discovery of several specimens of the organism Nummulites planulatus in glacial mud in the Danish North Sea, which are of likely Ypresian age. This finding suggests that the distribution range of the Nummulites population extends further north than previously known, and may be connected to the hyperthermal events of the early Eocene.
Article
Paleontology
Marcin Latas, Paul N. Pearson, Christopher R. Poole, Alessio Fabbrini, Bridget S. Wade
Summary: In this study, a new morphospecies of fossil planktonic foraminifera, Globigerinoides rublobatus n. sp., is described from Pleistocene sediments of the Indian Ocean and Pacific Ocean. The new morphospecies shows morphological variability and is found to occur in two variants, a pigmented (pink) form and a non-pigmented (white) form. This finding of pink pigmentation is rare among fossil planktonic foraminifera, with only two previous instances reported.
JOURNAL OF MICROPALAEONTOLOGY
(2023)
Article
Biodiversity Conservation
Gregor H. Mathes, Manuel J. Steinbauer, Laura Cotton
Summary: This study aims to assess the water quality and stress sources in Kane'ohe Bay, Hawai'i, by using benthic foraminifera as bio-indicators. The results show that water quality in the northern sector of Kane'ohe Bay supports the growth and recovery of coral reefs, while it deteriorates around Kane'ohe City.
PACIFIC CONSERVATION BIOLOGY
(2023)
Article
Paleontology
Paul N. Pearson, Eleanor John, Bridget S. Wade, Simon D'haenens, Caroline H. Lear
Summary: This study presents evidence that radially orientated crystalline spine-like structures occur in the centre of muricae in various species of Acarinina and Morozovella, suggesting they may have similar functions as spines in modern species.
JOURNAL OF MICROPALAEONTOLOGY
(2022)