Review of sea-level changes during the big five mass extinctions and several lesser extinction events reveals that the majority coincide with large eustatic inflexions. The degree of certainty with which these eustatic oscillations are known varies considerably. Thus, the late Ordovician and end Cretaceous extinctions are associated with unequivocal, major regressions demonstrated from numerous...

The Truong Son orogenic belt (TSOB) is one of the most important belts in Indochina block. There are numerous mafic to felsic intrusions Early Paleozoic caused by Tethyan orogeny. However, tectono-magmatic evolution TSOB still unclear. In this paper, zircon U-Pb dating, whole-rock geochemistry, and Sr-Nd isotopic data magmatic rocks have been systematically investigated explore petrogenesis tec...

The Siluro-Ordovician Southern Uplands terrane occupies a key position in the Caledonian Orogen, yet its genesis is controversial. Marginal basin, back-arc and forearc tectonic regimes, operative at the Laurentian margin of the Iapetus Ocean, have all been invoked. Fresh andesitic detritus within turbidite sandstones has, until now, been assumed to provide evidence for an Ordovician, supra-subd...

Bivalves and gastropods are the two largest classes of extant molluscs. Despite sharing a huge number of features, they do not share a key ecological one: gastropods are essentially epibenthic, while most bivalves are infaunal. However, this is not the ancestral bivalve condition; Cambrian forms were surface crawlers and only during the Ordovician a fundamental infaunalization process took plac...

The Scandinavian Caledonides comprise nappe stacks of far-travelled allochthons that record closure the Iapetus Ocean and subsequent continental collision Baltica Laurentia. Seve Nappe Complex (SNC) includes relics outermost Baltoscandian passive margin were subducted to mantle depths. earliest deep subduction events has been dated ca. 500–480 Ma. Evidence this event reported from northern expo...

Phytoplankton form the base of most marine trophic chains and studying their past diversity at regional global scales can provide valuable insights into evolution ecosystems climate history. Using a new database more than 4000 species acritarchs prasinophytes, comprehensive investigation taxonomic trajectories this (micro)phytoplankton throughout Paleozoic is performed for first time. This data...