High-resolution ammonite and carbon isotope stratigraphy across the Triassic–Jurassic boundary at New York Canyon (Nevada)

Extinction-Recovery Pattern of Level-Bottom Faunas Across the Triassic-Jurassic Boundary in Tibet: Implications for Potential Killing Mechanisms

“…2), which implies that Choristoceras survived into the earliest Jurassic. Although a global stratotype for the base of the Hettangian is not yet defined, this decision seems reasonable since it is in accordance with the traditional consensus that the first occurrence of psiloceratids defines the base of the Jurassic (e.g., Guex et al, 2004).…”

“…Pálfy (2003) and Guex et al (2004) nicely summarized potential effects, which include brief cooling, followed by global warming and subsequent effects like anoxia in stagnant oceans. Hautmann (2004Hautmann ( , 2006 and Hautmann et al (2008) added that the massive CO 2 and SO 2 emissions would also have dramatically reduced the saturation state of seawater with respect to CaCO 3 and, thereby, harmed organisms that secreted massive aragonitic and high-Mg calcitic skeletons.…”

“…Psiloceras (e.g., Guex et al, 2004;Hesselbo et al, 2004;Galli et al, 2005;Kuerschner et al, 2007). In the Germig section, the onset of the ␦ 13 C excursion lies ϳ1 m above the highest horizon with an unquestionable Rhaetian bivalve fauna (Fig.…”

Floral changes across the Triassic/Jurassic boundary linked to flood basalt volcanism

“…The role of SO 2 has generally been ignored, because sulphate aerosols (sulphuric acid droplets (H 2 SO 4 ) formed by the reaction of SO 2 with hydroxyl radicals) are very short lived and are washed out of the atmosphere after days to months. Hence, global cooling and the inhibition of photosynthesis triggered by sulphate aerosol darkening seems problematic as a valid mechanism for the observed floral changes 34 . Two recent case studies, however, have significantly altered our perception of the devastating effects of subaerial flood basalt eruptions.…”

On the reconstruction of plant photosynthetic and stress physiology across the Triassic–Jurassic boundary

“…The development of the Central Atlantic Magmatic Province (CAMP) at the boundary is widely considered to be a cause of the TJB event (e.g., Hesselbo et al, 2002;Guex et al, 2004;Marzoli et al, 2004;Kürschner et al, 2007;Ruhl et al, 2009;Van de Schootbrugge et al, 2009;Schoene et al, 2010) releasing large volumes of CO 2 (McElwain et al, 1999;Beerling and Berner, 2002;Galli et al, 2005;Huynh and Poulsen, 2005;Berner and Beerling, 2007;Cleveland et al, 2008;Van de Schootbrugge et al, 2008;Bacon et al, 2011;Schaller et al, 2011;Steinthorsdottir et al, 2011) and toxic gases such as sulfur dioxide (SO 2 ) into the atmosphere (Guex et al, 2004;Berner and Beerling, 2007;Hori et al, 2007;Van de Schootbrugge et al, 2009;Bacon et al, 2013). However, a firm mechanistic explanation for how CAMPinduced environmental changes triggered Late Triassic floral biodiversity losses is still lacking (Bonis et al, 2009).…”