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.

All labels observed (1)

Label Occurrences
Anisian canonical 6

How this entity was disambiguated

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 ⓘ
followsEvent end-Permian mass extinction ⓘ
GSSPApprovalYear 2007 ⓘ
GSSPApprovedBy International Commission on Stratigraphy ⓘ
GSSPDefined yes ⓘ
GSSPLocation Deşli Caira section, North Dobrogea, Romania ⓘ
languageOfNameOrigin Latinized from local river name ⓘ
lithostratigraphicCorrelates Moenkopi Formation in western North America ⓘ
linked to: Moenkopi Formation

Muschelkalk Group in Central Europe ⓘ
Yinping Formation and equivalents in South China ⓘ
lowerBoundaryDefinedBy first appearance of conodont Chiosella timorensis ⓘ
namedAfter Anisus River (Enns River) in the Austrian Alps ⓘ
linked to: Enns
namedBy Johann Mojsisovics ⓘ
Wilhelm Waagen ⓘ
namedInYear 1895 ⓘ
paleogeography characterized by widespread shallow epicontinental seas ⓘ
partOf Mesozoic Era ⓘ
Middle Triassic ⓘ
Triassic Period ⓘ
linked to: Triassic
positionInMiddleTriassic lower stage of the Middle Triassic ⓘ
positionInTriassic second stage of the Triassic Period ⓘ
precededBy Olenekian ⓘ
precedes Ladinian ⓘ
start approximately 247.2 million years ago ⓘ
subdividedInto Aegean substage ⓘ
Bithynian substage ⓘ
Illyrian substage ⓘ
Pelsonian substage ⓘ
timeScale International Commission on Stratigraphy timescale ⓘ
upperBoundaryDefinedBy first appearance of ammonoid Eoprotrachyceras curionii ⓘ

How these facts were elicited

Referenced by (6)

Full triples — surface form annotated when it differs from this entity's canonical label.

Late Triassic → precededBy → Anisian ⓘ
Middle Triassic → containsAge → Anisian ⓘ
subject linked to: Middle Tr.
Middle Triassic → oldestAge → Anisian ⓘ
subject linked to: Middle Tr.