Just out @ Earth-Science Reviews A new Rhaetian δ13Corg record: Carbon cycle disturbances, volcanism, End-Triassic mass Extinction (ETE) Author(s) Mariachiara Zaffania, Flavio Jadoulb, Manuel Rigoa Abstract: The links between large-scale volcanism, carbon cycle perturbations and the biotic crises at the End-Triassic Extinction event (ETE) are not well understood. The ETE seems to be marked by three carbon isotope excursions (CIEs) likely triggered by different eruptive phases of the Central Atlantic Magmatic Province (CAMP).
Just out @ Nature Ecology & Evolution The Pliocene marine megafauna extinction and its impact on functional diversity Author(s) Catalina Pimiento, John N. Griffin, Christopher F. Clements, Daniele Silvestro, Sara Varela, Mark D. Uhen & Carlos Jaramillo Abstract: The end of the Pliocene marked the beginning of a period of great climatic variability and sea-level oscillations. Here, based on a new analysis of the fossil record, we identify a previously unrecognized extinction event among marine megafauna (mammals,
On the News @ The Daily Caller Title: Scientists Have Predicted When Earth Will Be Hit By An Extinction-Level Asteroid Andrew Follett Excerpt: “The sun may have a companion star that periodically bombards Earth with storms of comets and asteroids, scientists from Lund University and the Swiss Federal Institute of Technology said Thursday. New studies of Earth’s impact craters found asteroids tended to hit roughly every 26 million years, adding to evidence that mass extinction events
On the News @ New York Post Title: Mass extinctions on Earth are more common than you think Ron Hogan Excerpt: “Most of us know about the asteroid that hit Earth just off the coast of the Yucatan Peninsula 65 million years ago and wiped out the dinosaurs, but that’s not the whole story. Many scientists now believe the 110-mile-wide rock may have been only partially responsible for the mass extinction
On the News @ BBC News Title: Volcanoes ‘triggered dawn of dinosaurs’ Rebecca Morelle Excerpt: “A million-year-long period of extreme volcanic activity most likely paved the way for the dawn of the dinosaurs, a study suggests. Scientists have analysed ancient rocks and have found traces of emissions from huge volcanic eruptions that happened about 200 million years ago. This would have led to one of the largest mass extinctions on
Just out @ PNAS Mercury evidence for pulsed volcanism during the end-Triassic mass extinction Author(s) Lawrence M. E. Percival, Micha Ruhl, Stephen P. Hesselbo, Hugh C. Jenkyns, Tamsin A. Mather, and Jessica H. Whiteside Abstract: The Central Atlantic Magmatic Province (CAMP) has long been proposed as having a causal relationship with the end-Triassic extinction event (∼201.5 Ma). In North America and northern Africa, CAMP is preserved as multiple basaltic units interbedded with uppermost Triassic to
Just out @ Earth-Science Reviews Permian tetrapod extinction events Author(s) S.G. Lucas Abstract: Four substantial tetrapod extinctions have been identified during the Permian, but only one of these is an apparent mass extinction. Analyses of global compilations of the family-level diversity of Permian tetrapods have been confounded by incorrect and compiled correlations. Instead, analyzing diversity patterns at the genus level in “best sections” identifies only one apparent mass extinction of Permian
Just out @ Current Biology Calcium Isotopic Evidence for Vulnerable Marine Ecosystem Structure Prior to the K/Pg Extinction Author(s) Jeremy E. Martin, Peggy Vincent, Théo Tacail, Fatima Khaldoune, Essaid Jourani, Nathalie Bardet, Vincent Balter Abstract: The collapse of marine ecosystems during the end-Cretaceous mass extinction involved the base of the food chain [ 1 ] up to ubiquitous vertebrate apex predators [ 2–5 ]. Large marine reptiles became suddenly extinct at