Warming-induced marine anoxia has been hypothesized as an environmental stressor for the end-Triassic mass extinction (ETME), but links between spread of and two phases are poorly constrained. Here, we report iron speciation trace metal data from Bristol Channel Basin Larne NW European epicontinental sea (EES), spanning Triassic–Jurassic (T–J) transition (~ 202–200 Ma). Results show frequent development anoxic-ferruginous conditions, interspersed with ephemeral euxinic episodes in during...

The Permo-Triassic marine mass extinction has been blamed on a range of culprits including anoxia, acidification, high temperature and increased sedimentation nutrient influx, the last two being direct consequence terrestrial biomass die-off climatic changes. In settings, role these kill mechanisms is likely to be depth-dependent with siltation temperatures potentially most consequential in shallowest waters. These ideas have investigated study boundary beds western Guizhou eastern Yunnan...

Abstract Reduction in body size of organisms following mass extinctions is well‐known and often ascribed to the Lilliput effect. This phenomenon expressed as a temporary reduction within surviving species. Despite its wide usage term loosely applied any small post‐extinction taxa. Here we assess bivalves family Limidae (Rafineque) prior to, aftermath of, end‐Triassic extinction event. Of species studied only one occurs event, though too scarce test for Instead, newly evolved originate at...

The Cleveland Basin of Yorkshire, UK hosts one the most iconic Lower Jurassic rock successions for studying Toarcian oceanic anoxic event and associated mass extinction, yet our understanding subsequent ecological recovery is limited. This study documents first time full extent nature benthic macrofaunal from early extinction within Basin. Benthic oxygen levels remained low following event, allowing specialist communities that were tolerant to dominate. Recovery began properly once seafloor...

Abstract Here we describe a new upper Toarcian (Lower Jurassic) marine gastropod fauna from rocks of the Cleveland Basin exposed on North Yorkshire coast England. The fossil assemblage consists 16 species, which three are new: Katosira ? bicarinata sp. nov., Turritelloidea stepheni nov. and Striactaenonina elegans Four species described in open nomenclature as Tricarilda sp., Jurilda Cylindrobullina Cossmannina other have previously been described: Coelodiscus minutus (Schübler Zieten),...

The Toarcian Oceanic Anoxic Event and associated early mass extinction event (ETME) have attracted a great deal of research effort, focusing primarily on the causal mechanisms. In contrast, there is less known patterns biotic recovery following this (and others). Yet such recoveries are interest as they record how surviving organisms radiate into newly vacated ecospace. Cleveland Basin, North Yorkshire, has one most expanded rock sections globally. Previous studies presented limited view...

The foreshore at Redcar hosts the oldest Jurassic succession exposed on Yorkshire-Cleveland Coast but has received little attention since late nineteenth century. Temporary removal of beach sands by winter storms early in 2018 allowed for a sedimentological and palaeontological study nearly 60 m-thick section. rocks are latest Hettangian to Early Sinemurian age (Early Jurassic) comprise five coarsening-upward cycles (parasequences) that grade from mudstones through siltstones into Gryphaea...

Biotic interactions and community structure are seldom examined in mass extinction studies but must be considered if we to truly understand recovery dynamics at the ecosystem scale. Here, model shallow marine food web across Toarcian event Cleveland Basin, UK using a trait-based inferential modelling framework. First, subjected our pre-extinction cascade simulations order identify nature of selectivity dynamics. Second, tracked pattern duration function following event. In agreement with...

Biotic interactions and community structure are seldom examined in mass extinction studies but must be considered if we to truly understand recovery dynamics at the ecosystem scale. Here, model shallow marine food web across a Mesozoic hyperthermal event, Toarcian extinction, Cleveland Basin, UK using trait-based inferential modelling framework. We subjected our pre-extinction cascade simulations order identify nature of selectivity dynamics. then tracked pattern duration function following...

As part of a study to evaluate the recovery from early Toarcian extinction event in Cleveland Basin, 477 new gastropod specimens were collected mid-late rocks Ravenscar section, North Yorkshire, UK. The gastropods preserved two modes: 1) with recrystallized shells, mainly Whitby Mudstone Formation, but also some Blea Wyke Sandstone Formation; 2) as external moulds mineralized patches shells Yellow Member. fossil assemblage comprised fifteen species, which three are new: Katosira ? bicarinata...

The Toarcian Oceanic Anoxic Event and associated early mass extinction event (ETME) have attracted a great deal of research effort, focusing primarily on the causal mechanisms. In contrast, there is less known patterns biotic recovery following this (and others). Yet such recoveries are interest as they record how surviving organisms radiate into newly vacated ecospace. Cleveland Basin, North Yorkshire, has one most expanded rock sections globally. Previous studies presented limited view...

As part of a study to evaluate the recovery from early Toarcian extinction event in Cleveland Basin, 477 new gastropod specimens were collected mid-late rocks Ravenscar section, North Yorkshire, UK. The gastropods preserved two modes: 1) with recrystallized shells, mainly Whitby Mudstone Formation, but also some Blea Wyke Sandstone Formation; 2) as external moulds mineralized patches shells Yellow Member. fossil assemblage comprised fifteen species, which three are new: Katosira ? bicarinata...