Abstract From the upper Maastrichtian (Tarbur Fm.) and Paleocene of Iran, 20 species scleractinian corals belonging to 17 genera 14 families, one octocoral Heliopora are newly recorded. Furthermore, coral previously described from Tarbur Fm. revised included in evaluation, resulting a total 37 28 families (including 3 subfamilies) for Iranian K/Pg-boundary time period. The majority taxa (21 out...

Planktonic foraminifera and major palynomorph groups (i.e. terrestrial, marine, and amorphous organic matter) of the Campanian-Selandian strata of the Gurpi Formation were studied to evaluate the changes in the Zagros paleobasin in southwestern Iran. Planktonic foraminifera were categorized into four morphotypes according to their paleodepth, extending from Morphotype 1, comprising surface gene...

Well-sampled dinosaur communities from the Jurassic through early Late Cretaceous show greater taxonomic diversity among larger (>50 kg) theropod taxa than of Campano-Maastrichtian, particularly to those eastern/central Asia and Laramidia. The large carnivore guilds in Asiamerican assemblages are monopolized by tyrannosaurids, with adult medium-sized (50–500 predators rare or absent. In cont...

New material of the derived baenid turtle Boremys pulchra from Hell Creek Formation Montana extends stratigraphic range taxon through at minimum latest Maastrichtian. Previously, species was constrained to Campanian and Alberta, so this extension constitutes least 5 million years. Due fossil reworking Bug Anthills assemblage, where Maastrichtian Paleocene deposits are mixed, a definitive for B....

Biostratigraphy has remained a tool for basin and environmental reconstruction in sedimentology. This study aims to further delineate classify the lithology, environment of deposition, biozonation microorganisms found studied well. Thirty-four (34) ditch cutting samples from OMA well, offshore Dahomey Basin, were considered their textural palynomorphs/palynofacies characterization. The observed...

The trace fossil Lepidenteron lewesiensis (Mantell 1822) provides an exceptional taphonomic window to diversity of fishes as shown for the Upper Cretaceous of Poland, in the Middle Turonian-Lower Maastrichtian deposits of the Opole Trough, Miechów Trough, Mazury-Podlasie Homocline, and SE part of the Border Synclinorium. Lepidenteron lewesiensis is an unbranched burrow lined with small fish sca...

—The large plagioptychid rudist bivalve Mitrocaprina tschoppi (Palmer) is recorded from the Guinea Corn Formation (Late Maastrichtian) of central Jamaica. This is the first record of this species outside of Cuba. M. tschoppi occurs in rhythm D6 of the Guinea Corn Formation, Macgillavryia Bed 1, together with a rudist assemblage including Praebarrettia sparcilirata (Whitfield), Macgillavryia nic...

The Campanian–Maastrichtian (83–66 Ma) was a period of global climate cooling, featuring significant negative carbon-isotope (δ13C) anomalies, such as the Late Campanian Event (LCE) and the Campanian–Maastrichtian Boundary Event (CMBE). A variety of factors, including changes in temperature, oceanic circulation and gateway opening, have been invoked to explain these δ13C perturbations, but no p...

Abstract The mid-Maastrichtian carbon isotope event (MME), dated at ∼69 Ma, reflects a perturbation of the global cycle that, in part, correlates with enigmatic extinction ‘true’ (i.e., non-tegulated) inoceramid bivalves. mechanisms this are still debated. While both extirpation and MME have been recorded variety deep-sea sites, little is known about their expression epicontinental chalk seas. ...