Following the Cambrian Explosion and the appearance in the fossil record of most animal
phyla associated with a range of new body plans, the Ordovician and Silurian periods …

The Ordovician Period (~ 485-444 Ma) was an interval of major, causally interconnected 15
changes in the Earth's biotic, climatic, and environmental systems. The diversity of marine …

The 'Great Ordovician Biodiversification Event'(GOBE) saw a spectacular increase in marine
biodiversity at all taxonomic levels largely within the phyla established much earlier during …

Abstract Changes in marine productivity and redox conditions during the end-Ordovician
(Hirnantian) glaciation and Ordovician–Silurian transition were investigated through Mo …

Widespread marine anoxia is hypothesized as the trigger for the second pulse of the Late
Ordovician (Hirnantian) mass extinction based on lithologic and geochemical proxies that …

Abstract The Ordovician of Scandinavia (ie Denmark, Norway and Sweden) has been
investigated for over two centuries and, through time, various chronostratigraphic schemes …

Graptoloid evolutionary dynamics show a marked contrast from the Ordovician to the
Silurian. Subdued extinction and origination rates during the Ordovician give way, during the …

The early Paleozoic climate has been described as warm and equable. However, recent
data based on conodont oxygen isotopic composition reveal a large, long, cooling trend …

Our new data address the paradox of Late Ordovician glaciation under supposedly high p
CO2 (8 to 22× PAL: preindustrial atmospheric level). The paleobiogeographical distribution …

Glacial episodes have been linked to Ordovician–Silurian extinction events, but cooling itself
may not be solely responsible for these extinctions. Teratological (malformed) assemblages …