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gptkbp:instanceOf
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mass extinction event
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gptkbp:affects
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marine ecosystems
terrestrial ecosystems
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gptkbp:alsoKnownAs
|
gptkb:Cretaceous–Paleogene_extinction_event
gptkb:K–Pg_extinction_event
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gptkbp:asteroidImpactLocation
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gptkb:Yucatán_Peninsula,_Mexico
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gptkbp:asteroidImpactSite
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gptkb:Chicxulub_crater
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gptkbp:boundaryLayer
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gptkb:K–T_boundary
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gptkbp:causedBy
|
asteroid impact
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gptkbp:causeOfExtinction
|
gptkb:ammonites
pterosaurs
non-avian dinosaurs
many plant species
many marine invertebrates
many marine reptiles
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gptkbp:endDate
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gptkb:Mesozoic_Era
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gptkbp:evidence
|
gptkb:shocked_quartz
iridium layer
tektites
|
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gptkbp:firstProposedImpactHypothesisBy
|
gptkb:Luis_Alvarez
gptkb:Walter_Alvarez
|
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gptkbp:followedBy
|
gptkb:Paleogene_period
|
|
https://www.w3.org/2000/01/rdf-schema#label
|
K–T extinction event
|
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gptkbp:occurredIn
|
about 66 million years ago
end of Cretaceous period
|
|
gptkbp:percentageOfSpeciesExtinct
|
about 75%
|
|
gptkbp:possibleAdditionalCauses
|
gptkb:volcanic_activity
gptkb:Deccan_Traps_eruptions
climate change
sea level fall
|
|
gptkbp:precededBy
|
gptkb:Cretaceous_period
|
|
gptkbp:significance
|
enabled mammalian diversification
end of dinosaur dominance
major transition in Earth's history
|
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gptkbp:startDate
|
gptkb:Cenozoic_Era
|
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gptkbp:studiedBy
|
geologists
paleontologists
|
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gptkbp:survived
|
birds
amphibians
mammals
turtles
crocodilians
some plants
|
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gptkbp:yearImpactHypothesisProposed
|
1980
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gptkbp:bfsParent
|
gptkb:Cretaceous–Tertiary_extinction_event
|
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gptkbp:bfsLayer
|
6
|