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...

Metasedimentary rock successions in Sierra Albarrana Group (SW Iberia Autochthonous Domain) were deposited during the Early Paleozoic influenced by evolution of a peri-Gondwanan active margin. Their geochemical composition indicates dominant contributions from felsic igneous sources and an upper continental crust provenance. The high mineralogical maturity, together with negative ?Nd(530), rang...

• New sedimentological data collected for Ediacaran carbonates of eastern Brazil. Revised depositional model: a remarkably energetic shallow platform environment. Early carbonate and phosphate cements co-occur in wave-swept microbial buildups. Limited extent phosphogenesis likely result local, not regional, processes. Proposed models related to local microbiology sediment supply. The Una Bambuí...

Carbon, sulfur and oxygen isotope profiles in Silurian strata of the Baltoscandian Basin (Estonia), coincident with Ireviken Bioevent, provide insights into basin-scale platform-specific depositional processes. Paired carbon records preserve a positive excursion during early Wenlock, faunal turnover, yet ?13C variability this compared to other locations within paleobasin reflects local influenc...

Formulation of the problem. Modern advances in oceanographic studies sedimentogenesis and orogenesis open up opportunities for in-depth study rocks by fold-nappe systems, including Carpathian region. Review previous research. On territory Carpathians flysch complexes researchers have mainly noted findings carbonates manganese iron nodules.At same time, contain iron-manganese oxide mineralizatio...

—Analysis of two independent data sets with increased taxonomic resolution (genera rather than families) using the revised 2012 timescale reveals that an extinction periodicity first detected by Raup and Sepkoski (1984) for only the post-Paleozoic actually runs through the entire Phanerozoic. Although there is not a local peak of extinction every 27 Myr, an excess of the fraction of genus extin...