Anisian
E727671
The Anisian is a Middle Triassic age/stage in the geologic timescale, notable for early Mesozoic marine and terrestrial life diversification following the end-Permian mass extinction.
Statements (50)
| Predicate | Object |
|---|---|
| instanceOf |
Middle Triassic stage
ⓘ
chronostratigraphic unit ⓘ geologic age ⓘ geologic stage ⓘ |
| associatedWith |
early archosaur evolution
ⓘ
early dinosaurs’ close relatives (dinosauromorphs) ⓘ temnospondyl amphibians ⓘ therapsid recovery and diversification ⓘ |
| biologicalSignificance |
continued recovery of terrestrial ecosystems
ⓘ
diversification of ammonoids ⓘ expansion of early marine reptiles ⓘ major diversification of marine life after end-Permian extinction ⓘ recovery and radiation of reef ecosystems ⓘ |
| chronologicalRange | ~247.2–242.0 Ma ⓘ |
| climateContext | generally warm greenhouse climate ⓘ |
| containsBiozones |
ammonoid biozones
ⓘ
conodont biozones ⓘ foraminiferal biozones ⓘ |
| end | approximately 242.0 million years ago ⓘ |
| followedBy | Ladinian ⓘ |
| follows | Olenekian NERFINISHED ⓘ |
| followsEvent | end-Permian mass extinction NERFINISHED ⓘ |
| GSSPApprovalYear | 2007 ⓘ |
| GSSPApprovedBy | International Commission on Stratigraphy NERFINISHED ⓘ |
| GSSPDefined | yes ⓘ |
| GSSPLocation | Deşli Caira section, North Dobrogea, Romania NERFINISHED ⓘ |
| languageOfNameOrigin | Latinized from local river name ⓘ |
| lithostratigraphicCorrelates |
Moenkopi Formation in western North America
NERFINISHED
ⓘ
Muschelkalk Group in Central Europe NERFINISHED ⓘ Yinping Formation and equivalents in South China NERFINISHED ⓘ |
| lowerBoundaryDefinedBy | first appearance of conodont Chiosella timorensis ⓘ |
| namedAfter | Anisus River (Enns River) in the Austrian Alps NERFINISHED ⓘ |
| namedBy |
Johann Mojsisovics
NERFINISHED
ⓘ
Wilhelm Waagen NERFINISHED ⓘ |
| namedInYear | 1895 ⓘ |
| paleogeography | characterized by widespread shallow epicontinental seas ⓘ |
| partOf |
Mesozoic Era
NERFINISHED
ⓘ
Middle Triassic NERFINISHED ⓘ Triassic Period NERFINISHED ⓘ |
| positionInMiddleTriassic | lower stage of the Middle Triassic ⓘ |
| positionInTriassic | second stage of the Triassic Period ⓘ |
| precededBy | Olenekian NERFINISHED ⓘ |
| precedes | Ladinian ⓘ |
| start | approximately 247.2 million years ago ⓘ |
| subdividedInto |
Aegean substage
ⓘ
Bithynian substage ⓘ Illyrian substage NERFINISHED ⓘ Pelsonian substage NERFINISHED ⓘ |
| timeScale | International Commission on Stratigraphy timescale ⓘ |
| upperBoundaryDefinedBy | first appearance of ammonoid Eoprotrachyceras curionii ⓘ |
Referenced by (3)
Full triples — surface form annotated when it differs from this entity's canonical label.