Six quadrate bones, of which two almost certainly come from the Kem Kem beds (Cenomanian, Upper Cretaceous) of south-eastern Morocco, are determined to be from juvenile and adult individuals of Spinosaurinae based on phylogenetic, geometric morphometric, and phylogenetic morphometric analyses. Their morphology indicates two morphotypes evidencing the presence of two spinosaurine taxa ascribed t...

Abstract We evaluate the Cretaceous stratigraphy and carbon sequestration potential of northern Baltimore Canyon Trough (NBCT) using >10,000 km multi-channel seismic profiles integrated with geophysical logs, biostratigraphy, lithology from 29 offshore wells. identify map six sequences resolved primarily at stage level. Accommodation was dominated by thermal non-thermal subsidence, thoug...

We report the discovery of mammalian tribosphenic teeth from the basal Cenomanian of southwestern France that we refer to a new primitive marsupial-like form identified as a basal taxon of Marsupialiformes, a new clade recognized here to include the crown group Marsupialia and primitive stem lineages more closely related to Marsupialia than to Deltatheroida. Arcantiodelphys marchandi gen et sp ...

The eutherian, family-level clade Zhelestidae is consistently although weakly supported in five phylogenetic analyses that we performed on all Cretaceous eutherians. Additionally in the fifth analysis, which included some placentals, Zhelestidae is placed as a stem eutherian clade rather than grouping within the crown clade Placentalia as argued in some previous studies but not others. The subf...

Searching one of the most important reservoirs Cretaceous in Iraq is aim many researchers. The studied sequences are Mishrif Formation southern Iraq. goal to define fauna and design biostratigraphic zoning. Forty genus species were identified as associated with capable reservoir facies (the biostrome). Identification biostrome mainly was Late Cenomanian part studying sequences. Suggested biozon...

The best-documented example of rapid climate change that characterized the so-called 'greenhouse world' took place at the time of the Palaeocene-Eocene boundary: introduction of isotopically light carbon into the ocean-atmosphere system, accompanied by global warming of 5-8 degrees C across a range of latitudes, took place over a few thousand years. Dissociation, release and oxidation of gas hy...

High-amplitude changes in sedimentary δ 13 C characterize the Cretaceous system and have been proven useful for supra-regional chemostratigraphic correlation. In Cretaceous, these perturbations indicate large shifts between global carbon reservoirs that are usually caused by volcanic activity of igneous provinces, widespread deposition thick organic carbon-rich sequences and/or orbital paramete...