Triassic–Jurassic extinction event

E201672

geological boundary event mass extinction event paleontological event

The Triassic–Jurassic extinction event was a major mass extinction around 201 million years ago that wiped out many marine and terrestrial species, paving the way for dinosaurs to become the dominant land animals in the Jurassic Period.

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All labels observed (4)

Label	Occurrences
Triassic–Jurassic boundary	3
Triassic–Jurassic extinction event canonical	1
Triassic–Jurassic mass extinction	1
end-Triassic extinction	1

How this entity was disambiguated

This entity first appeared as the object of triple T1772748 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.

NED1 Entity disambiguation (via context triple) gpt-5-mini-2025-08-07

Target entity: Triassic–Jurassic extinction event
Context triple: [Triassic, endsWith, Triassic–Jurassic extinction event]

A. Permian–Triassic mass extinction
The Permian–Triassic mass extinction was the most severe biodiversity crisis in Earth's history, wiping out the majority of marine and terrestrial species around 252 million years ago and marking the boundary between the Paleozoic and Mesozoic eras.
B. Late Devonian extinction
The Late Devonian extinction was a prolonged series of biodiversity crises around 375–359 million years ago that devastated marine life, especially reef ecosystems and armored fishes, and ranks among the largest mass extinctions in Earth’s history.
C. Cretaceous–Paleogene boundary
The Cretaceous–Paleogene boundary marks the geological transition 66 million years ago associated with a mass extinction event that wiped out non-avian dinosaurs and many other species, likely triggered by a large asteroid impact.
D. Triassic
The Triassic was the first period of the Mesozoic Era, marked by the initial diversification of dinosaurs and the recovery of life following the Permian–Triassic mass extinction.
E. Jurassic Period
The Jurassic Period was a major division of the Mesozoic Era characterized by warm climates, the dominance and diversification of dinosaurs, and the early evolution of birds.
F. None of above. chosen
G. Unsure - the case is ambiguous/there is not enough information to decide.

NED2 Entity disambiguation (via description) gpt-5-mini-2025-08-07

Target entity: Triassic–Jurassic extinction event
Target entity description: The Triassic–Jurassic extinction event was a major mass extinction around 201 million years ago that wiped out many marine and terrestrial species, paving the way for dinosaurs to become the dominant land animals in the Jurassic Period.

A. Permian–Triassic mass extinction
The Permian–Triassic mass extinction was the most severe biodiversity crisis in Earth's history, wiping out the majority of marine and terrestrial species around 252 million years ago and marking the boundary between the Paleozoic and Mesozoic eras.
B. Late Devonian extinction
The Late Devonian extinction was a prolonged series of biodiversity crises around 375–359 million years ago that devastated marine life, especially reef ecosystems and armored fishes, and ranks among the largest mass extinctions in Earth’s history.
C. Cretaceous–Paleogene boundary
The Cretaceous–Paleogene boundary marks the geological transition 66 million years ago associated with a mass extinction event that wiped out non-avian dinosaurs and many other species, likely triggered by a large asteroid impact.
D. Triassic
The Triassic was the first period of the Mesozoic Era, marked by the initial diversification of dinosaurs and the recovery of life following the Permian–Triassic mass extinction.
E. Jurassic Period
The Jurassic Period was a major division of the Mesozoic Era characterized by warm climates, the dominance and diversification of dinosaurs, and the early evolution of birds.
F. None of above. chosen

Statements (47)

Predicate	Object
instanceOf	geological boundary event ⓘ mass extinction event ⓘ paleontological event ⓘ
affects	marine ecosystems ⓘ terrestrial ecosystems ⓘ
alsoKnownAs	Triassic–Jurassic mass extinction ⓘ linked to: Triassic–Jurassic extinction event end-Triassic extinction ⓘ linked to: Triassic–Jurassic extinction event
approximateAgeInMillionsOfYearsAgo	201 ⓘ
associatedWith	Central Atlantic Magmatic Province volcanism ⓘ breakup of Pangaea ⓘ opening of the Central Atlantic Ocean ⓘ
causesDeclineOf	many marine species ⓘ many terrestrial species ⓘ
causesExtinctionOf	many archosaur lineages other than dinosaurs ⓘ many conodonts ⓘ many large amphibians ⓘ numerous reef-building organisms ⓘ
enables	dinosaur dominance on land ⓘ
era	Mesozoic Era ⓘ
estimatedMarineGeneraLossPercentage	20–30 ⓘ
followedBy	diversification of dinosaurs in the Jurassic ⓘ
follows	Late Triassic biota ⓘ
geologicalBoundary	Triassic–Jurassic boundary ⓘ linked to: Triassic–Jurassic extinction event
impactOn	faunal turnover in the oceans ⓘ faunal turnover on land ⓘ
lessSupportedCauseHypothesis	large bolide impact ⓘ
occursAtBoundaryOf	Jurassic Period ⓘ Triassic Period ⓘ linked to: Triassic
partOf	Phanerozoic mass extinction record ⓘ linked to: Phanerozoic mass extinctions
possibleCause	increased atmospheric CO2 ⓘ massive flood basalt volcanism ⓘ ocean acidification ⓘ ocean anoxia ⓘ rapid climate change ⓘ sea-level changes ⓘ
precedes	Early Jurassic biodiversity radiation ⓘ
precedesDominanceOf	dinosaurs ⓘ
rankAmongMassExtinctions	major ⓘ
recognizedBy	International Commission on Stratigraphy ⓘ
relativeSeverity	one of the five largest Phanerozoic mass extinctions ⓘ
resultsIn	ecological release for dinosaurs ⓘ reduction of competing large vertebrates ⓘ
stratigraphicMarker	Triassic–Jurassic boundary GSSP ⓘ linked to: Global Boundary Stratotype Section and Point for base of Hettangian
studiedInDiscipline	paleoecology ⓘ paleontology ⓘ stratigraphy ⓘ
timeIntervalRangeInMillionsOfYearsAgo	~201–199 ⓘ

How these facts were elicited