Results 11 to 20 of about 1,662,610 (136)

Late Valanginian extinction and turnover of Tethyan brachiopods: A signal of the Weissert Event (Bakony Mountains, Hungary) [PDF]

Palaeogeography, Palaeoclimatology, Palaeoecology, 2020
Brachiopods, together with ammonoids, were collected bed-by-bed from several Lower Cretaceous pelagic sections and localities in the Bakony Mountains (Transdanubian Range, Hungary), dated by detailed ammonoid and nannofossil biostratigraphy.
Vörös, Attila, Főzy, István, Szives, Ottilia, Dulai, Alfréd   +3 more
core   +3 more sources

Arctic reappraisal of global carbon-cycle dynamics across the Jurassic–Cretaceous boundary and Valanginian Weissert Event

Palaeogeography, Palaeoclimatology, Palaeoecology, 2020
Late Jurassic – Early Cretaceous global carbon-cycle dynamics have mainly been inferred from Tethyan, Atlantic and Pacific carbon-isotope (δ13C) records.
Stemmerik, Lars, Vickers, Madeleine L., Vickers, Madeleine, Olaussen, Snorre, Śliwińska, Kasia K., Koevoets, Maayke J., Koevoets, Maaike, Jelby, Mads E., Alsen, Peter   +8 more
core   +4 more sources

Apports continentaux versus upwellings dans le déclenchement de l’événement océanique anoxique Weissert (~137 Ma) : contraintes micropaléontologiques et isotopiques

, 2021
Many oceanic anoxic events are recorded in Cretaceous marine sediments (143.1 – 66 My). They are characterized by extensive organic-carbon deposition and associated perturbations in the global carbon cycle.
Homaidan Shmeit, Majd
core   +3 more sources

A High‐Resolution Belemnite Geochemical Analysis of Early Cretaceous (Valanginian‐Hauterivian) Environmental and Climatic Perturbations [PDF]

Geochemistry, Geophysics, Geosystems, 2018
The Early Cretaceous Weissert event, characterized by a positive carbon isotope excursion and coincident with the Paraná‐Etendeka volcanism, saw a biogeochemical chain of events that ultimately led to an increase in carbon burial.
Gregory D. Price, Nico M. M. Janssen, Mathieu Martinez, Miguel Company, Justin H. Vandevelde, Stephen T. Grimes   +5 more
doaj   +2 more sources

Characterization of the Weissert oceanic anoxic event in lower Cretaceous limestones of the Guaniguanico terrain, Sierra de los Órganos, Western Cuba

Frontiers in Earth Science
The breakup of Pangea started in the Late Triassic when the new Tethyan domain developed into diverse sub-basins which began as shallow-water passive margins progressing into deeper foreland basins. Our study presents a high-resolution chemostratigraphic
Johanset Orihuela, Mihaela C. Melinte Dobrinescu, Florentin J.-M. R. Maurrasse   +2 more
doaj   +2 more sources

Sedimentology and chemostratigraphy of a Valanginian carbonate succession from the Baja Guajira Basin, northern Colombia

Brazilian Journal of Geology
: The Kesima Member of the Palanz Formation constitutes the first record of Cretaceous marine sedimentation along the Baja Guajira Basin, northern Colombia. Sedimentologic and petrographic analyses suggest a deposition along a coral reef dominated rimmed
Juan Carlos Silva-Tamayo, Catalina Ramirez, Mario Lara, Alcides Nobrega Sial, David Trujillo, Edward Salazar   +5 more
doaj   +2 more sources

The resilience of Tethyan planktonic and benthic calcifiers to Early Cretaceous perturbations: comparison between the Valanginian Weissert Event and the early Aptian Oceanic Anoxic Event 1a

Geological Society, London, Special Publications
During the Cretaceous, the Berriasian–Aptian interval witnessed a transition from a relatively cool climate with intermittent polar ice to a greenhouse state that persisted throughout the Late Cretaceous. These palaeoclimatic changes were associated with
Erba, Elisabetta, E. Erba, M. Parente, Parente, Mariano   +3 more
core   +4 more sources

Terrestrial response to the Early Cretaceous Weissert Event: Insights from carbon isotope records of organic matter and leaf wax n-alkanes in an inland East Asian lake

Palaeogeography, Palaeoclimatology, Palaeoecology
The Weissert Event (WE), a significant Early Cretaceous environmental disruption, is recognized globally in marine carbonate records for its positive carbon isotope excursion (CIE), organic matter (OM) enrichment, and widespread anoxia.
Hu, Jianfang, Xi, Dangpeng, Pan, Yanhong, Qin, Zuohuan, Tong, Xiaoning, Peng, Ping'an, Algeo, Thomas J.   +6 more
core   +2 more sources

High-precision geochronology of the Equatorial Atlantic Magmatic Province (EQUAMP): temporal correlations with the Paraná-Etendeka magmatic province and the Weissert event

Earth and Planetary Science Letters
The Equatorial Atlantic Magmatic Province (EQUAMP) is an intrusive large igneous province (LIP) related to the dismembering of the West Gondwana supercontinent and early opening stage of the South Atlantic Ocean.
Oliveira A. L., Erba E., Macêdo Filho A., Hollanda M. H. B. M., Schmitz M. D., Crowley J. L.   +5 more
core   +3 more sources

VALANGINIAN RADIOLARIANS OF NE SARDINIA (ITALY) IN THE FRAME OF THE WEISSERT EVENT

Acta Palaeontologica Romaniae, 2022
This article presents the very rich radiolarian fauna from the S’Ozzastru section of the Siniscola Marl crop-ping out in the northern part of Mt Albo massif (NE Sardinia, Italy). The formation was ascribed to the lower part of the upper Valanginian on the basis of the ammonite fauna indicating the Verrucosum Zone and the nannofossil con-tent suggesting
Dumitrica, Paulian, Dieni, Iginio, Massari, Francesco   +2 more
openaire   +2 more sources