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 …

Abstract The Late Ordovician (Katian-Hirnantian) through earliest Silurian (Rhuddanian)
interval was a time of varying climate and sea level, marked by a peak glacial episode in the …

The Neoproterozoic provides an important record of glacial–postglacial paleoenvironments,
organic carbon cycling, and hydrocarbon accumulation. Here, to better understand the …

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

This paper proposes a global review of Hirnantian event stratigraphy. The Hirnantian GSSP
in south China is tentatively correlated with latest Ordovician strata from the peri …

At least six glaciations are purported to have affected North Africa and the Middle East
region over the last one billion years, including two in the Cryogenian (Neoproterozoic) …

Whereas the vast majority of discovered hydrocarbon reserves in Iraq reside in Cretaceous
and Cenozoic reservoirs, numerous oil and gas fields have been discovered recently in …

Silurian black shales are among the most significant hydrocarbon source rocks globally, and
are widespread across the southern and eastern Sichuan Basin and adjacent areas. Their …

The Early Palaeozoic Icehouse (Late Ordovician-Early Silurian, c. 455–425 Ma) was a
remarkable event in the Earth's climatic history, marked by extensive glaciations occurring at …

A large, typical, marine, organic-rich shale is developed in the Ordovician Wufeng Formation-
Silurian Longmaxi Formation in the Sichuan Basin, China, which has rich shale gas …