We report on new collections of cephalopods (ammonites and nautilids) from the Cretaceous-Paleogene (K-Pg) successions Corsicana Kincaid formations exposed along Brazos River in Falls County, Texas. An abundant fauna eight species comprising four genera ammonites is described Formation, including Discoscaphites mullinaxorum n. sp. The presence aptychi (probably lower jaws) Eubaculites, as well ...

Abelisaurid theropods are well known in Cretaceous beds along South America, particularly Patagonia. However, the record of latest abelisauroids is still far from satisfactory. Until recently, few taxa were described Maastrichtian beds: Carnotaurus sastrei and Quilmesaurus curriei, but also perhaps Abelisaurus comahuensis. In this contribution, we describe a new genus species (Niebla antiqua ge...

Bothremydidae is the most abundant clade of turtles in Campanian and Maastrichtian (Upper Cretaceous) fossil record southwestern Europe. Several members Foxemydina Gaffney, Tong & Meylan, 2006 are known an area that includes Southern France North-Eastern half Spain. The problematic ‘Polysternon’ atlanticum worst characterized, lacking a diagnosis allows its specific validity to be confirmed...

In this study biostratigraphy of the Upper Cretaceous deposits (Gurpi Formation) in Sepidan section located in the Interior Fars basin (SW Iran) was studied. The Gurpi Formation in this section consists of 360 m lime shale, argillaceous limestone and shale laid continuously on the Ilam Formation and with a paraconformity under the Pabdeh Formation. Nine genera and 27 species of planktonic foram...

Abstract The timing and mechanisms of the climatic environmental perturbations induced by emplacement Deccan Traps large igneous province (India) their contribution to Cretaceous-Paleogene (K-Pg) mass extinction are still debated. In many marine sediment archives, mercury (Hg) enrichments straddling K-Pg boundary have been interpreted as signature volcanism, but Hg may also derived from Chicxul...

Abstract Large offshore depocenters above a weak detachment level (either salt or shale) can undergo gravity spreading and/or gliding. The gravitational systems (e.g., gliding deltas) are classically composed of an updip domain affected by extensional listric normal faults and downdip toe thrusts. While the role in such is classic tectonic process, mechanical behavior mobile shale levels shale-...

Abstract Reconstructing dinosaur trophic structure prior to the Cretaceous–Paleogene (K–Pg) boundary may provide information about ecosystem organization and evolution. Using calcium isotopes, we investigate preserved biogenic isotope compositions in a set of teeth from three continental formations Alberta, Canada, assess latest Cretaceous food web structure. Tooth enamel δ44/42Ca values are pr...