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Persistent global marine euxinia in the early Silurian

open access: yesNature Communications, 2020
The second pulse of the Late Ordovician mass extinction occurred around the Hirnantian-Rhuddanian boundary (~444 Ma) and has been correlated with expanded marine anoxia lasting into the earliest Silurian.
Richard G Stockey   +2 more
exaly   +2 more sources

A Silurian pseudocolonial pterobranch

Current Biology, 2023
Pterobranchs, a major group of the phylum Hemichordata, first appear in the fossil record during the Cambrian,1 and there are more than 600 fossil genera dominated by the mainly planktic graptolites of the Paleozoic, which are widely used as zone fossils for correlating sedimentary rock sequences.2 Pterobranchs are rare today; they are sessile marine ...
Derek E.G. Briggs   +1 more
openaire   +2 more sources

Formation Stages and Evolution Patterns of Structural Fractures in Marine Shale: Case Study of the Lower Silurian Longmaxi Formation in the Changning Area of the Southern Sichuan Basin, China

, 2020
Taking the Lower Silurian Longmaxi Formation in the Changning area of the southern Sichuan Basin as an example, the characteristics and formation stages of tectonic fractures are comprehensively st...
Cunhui Fan   +6 more
semanticscholar   +1 more source

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