Changes in organic matter composition during the Toarcian Oceanic Anoxic Event (T-OAE) in the Posidonia Shale Formation from Dormettingen (SW-Germany)

During the Early Toarcian, deposition of organic carbon-rich-shales occurred throughout epicontinental sea across Europe. Climate instability and high extinction rates in marine realm were associated with profound environmental changes. The Toarcian Oceanic Anoxic Event (T-OAE) has been linked to injection greenhouse gases (e.g. oceanic methane) into atmosphere triggered by emplacement Karoo-Ferrar large igneous province (LIP) volcanism. data presented are obtained from Posidonia Shale Formation Dormettingen (southwestern Germany), ~2 km well-known Dotternhausen section. Despite intense palaeontological geochemical research, studies on particulate matter (POM) T-OAE scarce. Here, we provide a detailed study POM section as tool evaluate changes depositional environment. Integrated (i.e. amorphous matter, terrestrial palynomorphs) carbon isotope δ13C) analyses reveal different episodes palaeoecological upheavals during studied time interval. In this study, will integrate new palynofacies combine it existing sedimentological order interpret relative sea-level fluctuations climatic at local palaeogeographic setting.