Four TOC-rich shale intervals spanning the Frasnian–Famennian (F–F) boundary were recovered in a drillcore (West Valley NX-1) from western New York (USA) and radiometrically dated using Re–Os. Two of the black shale intervals (WVC785 from ∼2.9 m below, and WVC754 from ∼6.4 m above the F–F boundary, respectively) yielded statistically overlapping ages with uncertainties of b1.1%. An interpolated...

biostratigraphy of bahram formation succession, with 359.8 meter thickness, in the sardar section (north of kerman, central iran) is done in this study. bahram formation is mostly composed of limestones (with a lesser amount of sandstones), and conformably overlies the top sandstone beds of the padeha formation. but, the upper boundary with the hutk formation (late tounaisian) is disconformable...

The new genus Aramazdospirifer n. gen. (Cyrtospiriferidae) is erected to include Spirifer orbelianus Abich, 1858 from the lower Famennian of Central Armenia as its type species and refute long-standing claims related affinities latter. micro-ornament internal structure this are investigated documented for first time, on basis recently collected material Ertych horizon three different sections. ...

A large population of the acritarch genus Pyloferites Quadros 1999 was recovered from Devonian strata Paraná Basin, Alto Garças Sub-basin (Brazil), at Jaciara section. Based on a literature review and examination new material, including morphometric analyses, shows wide morphological variability, and, therefore, is herein emended. Additionally, species emendation are instituted: escobaides (Cra...