Abstract The end Ordovician (Hirnantian) extinction was the first of the five big Phanerozoic
extinction events, and the first that involved metazoan-based communities. It comprised two …

The temporal and spatial distribution of Hirnantian brachiopod faunas are reviewed based
on a new, comprehensive dataset from over 20 palaeoplates and terranes, a revised …

The phylogeographical evolution and the consequent changing distribution and diversity of
rhynchonelliform brachiopods through the Ordovician are linked to the dynamic …

Aim To investigate relative niche stability in species responses to various types of
environmental pressure (biotic and abiotic) on geological time‐scales using the fossil …

The high concentration of molecular oxygen in Earth's atmosphere is arguably the most
conspicuous and geologically important signature of life. Earth's early atmosphere lacked …

Abstract The Upper Ordovician Cincinnatian Series is a critical upper Katian reference
succession. Previously, six 3rd-order depositional sequences (C1 to C6) have been …

Massive-bedded Thalassinoides ichnofacies occurs pervasively in widely separated areas
on the vast Upper Ordovician carbonate platforms along the palaeoequator of Laurentia …

Three tectonic events affected the northern margin of Laurentia between Early Ordovician
and Early Devonian time. Each tectonic cycle started with an unconformity followed by rapid …

Geologic process, including tectonics and global climate change, profoundly impact the
evolution of life because they have the propensity to facilitate episodes of biogeographic …

Abstract The upper Katian (Upper Ordovician) Red River Formation is a carbonate-evaporite
supersequence that formed in the epicratonic Williston Basin of western North America. This …