Results 71 to 80 of about 6,971 (210)

Toarcian anoxic event in Europe: An organic geochemical study

Marine and Petroleum Geology, 1989
Abstract A total of 48 sediment samples, comprising both black shales and associated organic-poor interbeds, were examined from Toarcian organic-rich sections throughout Europe. Despite being contemporaneous deposits of a single oceanic anoxic event (OAE), the molecular organic geochemical characteristics, particularly the steroidal hydrocarbons, of ...
Farrimond P, Eglinton G, Brassell SC, Jenkyns HC   +3 more
openaire   +3 more sources

Elevated atmospheric CO2 drove spatial variability in terrestrial organic carbon burial during the Toarcian hyperthermal

Communications Earth & Environment
Enhanced organic carbon burial associated with widespread black shale deposition functioned as a critical feedback mechanism for removing excess carbon from the atmosphere-ocean system during the Early Toarcian hyperthermal (~183 Ma).
Ruoyuan Qiu, Xiujuan Bao, David B. Kemp, Jiaqi Guo, Shuai Yuan, Wang Zhang, Huajian Wang, Mu Liu, Ruizhen Zhang, Bo Wan, Liang Zhao, Yongyun Hu, Zhijun Jin   +12 more
doaj   +1 more source

Anatomy and Sequence Architecture of the early Post-Rift in the Neuquén Basin (Argentina): A Response to Physiography and Relative Sea-level Changes [PDF]

, 2013
A detailed architectural and sequence stratigraphic analysis was carried out in the early-post-rift succession of central Neuque´n Basin (Middle Jurassic Cuyo Group), integrating outcrop and subsurface information from a 3,000 km2 area.
Massaferro, Jose L, Schwarz, Ernesto, Spalletti, Luis Antonio, Veiga, Gonzalo Diego   +3 more
core   +2 more sources

A New Plesiosauroid from the Toarcian (Lower Jurassic) of Alhadas, Portugal [PDF]

Acta Palaeontologica Polonica, 2012
A partial plesiosauroid skull from the Sao Giao Formation (Toarcian, Lower Jurassic) of Alhadas, Portugal is re-evaluated and described as a new taxon, Lusonectes sauvagei gen. et sp. nov. It has a single autapomorphy, a broad triangular parasphenoid cultriform process that is as long as the posterior interpterygoid vacuities, and also a unique ...
Smith, Adam S., Araújo, Ricardo, Mateus, Octávio   +2 more
openaire   +2 more sources

Catalogue of the type fossils stored in the Palaeontological Museum of "Sapienza" University of Rome. 3 [PDF]

, 2015
This paper is a third contribution towards a catalogue of all types stored in the Palaeontological Museum of "Sapienza" University of ...
Manni, Riccardo Pier Celestino
core  

Evolution of the last koninckinids (Athyridida, Koninckinidae), a precursor signal of the early Toarcian mass extinction event in the Western Tethys [PDF]

, 2015
Koninckinids are a suitable group to shed light on the biotic crisis suffered by brachiopod fauna in the Early Jurassic. Koninckinid fauna recorded in the late Pliensbachian–early Toarcian from the easternmost Subbetic basin is analyzed and identified as
Baeza Carratalá, José Francisco, García Joral, Fernando, Giannetti, Alice, Tent-Manclus, Jose Enrique   +3 more
core   +2 more sources

Barium Isotopes Indicate Spatiotemporal Heterogeneity of Marine Primary Productivity During the Toarcian Oceanic Anoxic Event

Geophysical Research Letters, Volume 53, Issue 10, 28 May 2026.
Abstract The Toarcian Oceanic Anoxic Event (T‐OAE, ∼183 Ma) was characterized by globally enhanced organic‐carbon burial and a negative carbon‐isotope excursion (N‐CIE). However, the role of marine productivity at this time, and its spatiotemporal variability, is unclear.
Wenhan Chen, David B. Kemp, Hugh C. Jenkyns, Stuart A. Robinson, Yibo Lin, Jun Hu, Zhong Han, Tianchen He, Feifei Zhang, Xilei Sun, Guangyu Shi, Chao Li   +11 more
wiley   +1 more source

New Zealand Geological Timescale 2025

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
New Zealand Geological Timescale 2025 (NZGT 2025) is the first comprehensive update and revision of the New Zealand Geological Timescale in a decade. The criteria used to establish age ranges of New Zealand Stages within the NZGT have been reviewed, calibrated, and revised where required against the 2023/04 International Chronostratigraphic Chart and ...
Christopher D. Clowes, James S. Crampton, Kyle J. Bland, J. Ian Raine, Andrew F. Boyes, Hamish J. Campbell, Erica M. Crouch, Martin P. Crundwell, Neville Hudson, Elizabeth M. Kennedy, Donald A. B. MacFarlan, Hugh E. G. Morgans, Marcus D. Richards, Matthew W. Sagar   +13 more
wiley   +1 more source

Molecular paleothermometry of the early Toarcian climate perturbation

Global and Planetary Change, 2020
Abstract In this paper, we use molecular paleothermometry, based on the TEX86 proxy derived from fossilized archaeal lipids, to reconstruct absolute sea surface temperatures (SSTs) for the northwest Tethys Shelf during the late Pliensbachian to early Toarcian (Early Jurassic, ~183 Ma) stages.
Ruebsam Wolfgang, Reolid Matias, Sabatino Nadia, Masetti Daniele, Schwark Lorenz   +4 more
openaire   +1 more source

Initiation of the Ferrar Large Igneous Province Started in Southern North Victoria Land, Antarctica, With Shallow Emplacement of Sills Causing Magma‐Soft‐Rock Interaction and Phreatomagmatic Eruptions

New Zealand Journal of Geology and Geophysics, Volume 69, Issue 1, March 2026.
Early Jurassic volcanism was in the southern north Victoria Land portion of the Ferrar Large Igneous Province preceded by multiple phases of shallow‐level intrusions of Ferrar sills into the 300 m thick cover of sedimentary rocks of the Triassic‐Jurassic Victoria Group.
Lothar G. Viereck, Jörg Büchner, Robert Schöner, Jörg W. Schneider, Benjamin Bomfleur, Jan Tympel, Ricarda Hanemann, Axel Gerdes   +7 more
wiley   +1 more source