Mechanisms and drivers of belemnite body-size dynamics across the Pliensbachian–Toarcian crisis [PDF]
Royal Society Open Science, 2019 Body-size reduction is considered an important response to current climate warming and has been observed during past biotic crises, including the Pliensbachian–Toarcian crisis, a second-order mass extinction.
Patricia Rita +2 more
exaly +2 more sources
The impact of global warming and anoxia on marine benthic community dynamics: an example from the Toarcian (Early Jurassic). [PDF]
PLoS ONE, 2013 The Pliensbachian-Toarcian (Early Jurassic) fossil record is an archive of natural data of benthic community response to global warming and marine long-term hypoxia and anoxia.
Silvia Danise +3 more
doaj +8 more sources
Global ocean redox changes before and during the Toarcian Oceanic Anoxic Event [PDF]
Nature Communications, 2023 Geochemical modeling shows that just a several percent expansion of O2-free areas with toxic sulfide build-up likely contributed to biodiversity loss or reorganization during the Toarcian mass extinction 183 million years ago.
Alexandra Kunert, Brian Kendall
doaj +2 more sources
The first gladius-bearing coleoid cephalopods from the lower Toarcian “Schistes Cartons” Formation of the Causses Basin (southeastern France) [PDF]
PeerJThe fossil record of gladius-bearing coleoids is scarce and based only on a few localities with geological horizons particularly favourable to their preservation (the so-called Konservat-Lagerstätten), which naturally leads to strongly limited data on ...
Romain Jattiot +5 more
doaj +3 more sources
New age constraints on the Lower Jurassic Pliensbachian–Toarcian Boundary at Chacay Melehue (Neuquén Basin, Argentina) [PDF]
Scientific Reports, 2022 The Pliensbachian–Toarcian boundary interval is characterized by a ~ 3‰ negative carbon-isotope excursion (CIE) in organic and inorganic marine and terrestrial archives from sections in Europe, such as Peniche (Portugal) and Hawsker Bottoms, Yorkshire ...
Aisha H. Al-Suwaidi +10 more
doaj +2 more sources
Evidence for the early Toarcian Carbon Isotope Excursion (T-CIE) from the shallow marine siliciclastic red beds of Arabia [PDF]
Scientific Reports, 2022 The Toarcian Oceanic Anoxic Event (T-OAE) and its corresponding Carbon Isotope Excursion (CIE) have been reported widely across the Tethyan region and globally.
Mahmoud Alnazghah +5 more
doaj +2 more sources
Ocean acidification at the Toarcian Anoxic Event captured by boron isotopes in the lime mud record [PDF]
Communications Earth & EnvironmentThe Toarcian Oceanic Anoxic Event (ca. 183 million years ago) marks a global mass extinction coincident with dramatic changes in climate and ocean circulation, likely driven by large igneous province emplacement.
Simone A. Kasemann +9 more
doaj +2 more sources
Charcoal evidence that rising atmospheric oxygen terminated Early Jurassic ocean anoxia [PDF]
Nature Communications, 2017 Numerical models predict that during an oceanic anoxic event (OAE), increased organic carbon burial drives a rise in atmospheric oxygen leading to the event’s termination. Here, the authors present evidence suggesting that the Toarcian OAE was terminated
Sarah J. Baker +4 more
doaj +2 more sources
An unusual early-diverging plesiosauroid from the Lower Jurassic Posidonia Shale of Holzmaden, Germany [PDF]
PeerJThe lower Toarcian Posidonia Shale at Holzmaden, Southwest Germany, has yielded some of the most remarkable Lower Jurassic marine tetrapod specimens, including five plesiosaur taxa identified from nearly complete skeletons.
Sven Sachs, Daniel Madzia
doaj +3 more sources
Assessing the importance of thermogenic degassing from the Karoo Large Igneous Province (LIP) in driving Toarcian carbon cycle perturbations [PDF]
Nature Communications, 2021 The emplacement of the Karoo LIP occurred synchronously with the Toarcian crisis, which is characterized by negative carbon isotope excursions. Here the authors use carbon cycle modelling to show that thermogenic carbon released during LIP emplacement ...
Thea H. Heimdal +3 more
doaj +2 more sources