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gptkbp:instanceOf
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mass extinction event
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gptkbp:alsoKnownAs
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gptkb:Cretaceous–Paleogene_extinction_event
gptkb:Cretaceous–Tertiary_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:borders
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gptkb:Paleogene_period
gptkb:Cretaceous_period
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gptkbp:boundaryLayerCharacteristic
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enriched in iridium
thin clay layer
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gptkbp:boundaryLayerName
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gptkb:K–Pg_boundary
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gptkbp:causedBy
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asteroid impact
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gptkbp:causeOfExtinction
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gptkb:ammonites
pterosaurs
non-avian dinosaurs
many plant species
many bird species
many marine invertebrates
many marine reptiles
many plankton species
many terrestrial animals
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gptkbp:effectOnClimate
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acid rain
global cooling
darkened skies
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gptkbp:effectOnEcosystems
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collapse of food chains
end of many dominant groups
massive loss of biodiversity
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gptkbp:effectOnEvolution
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rise of mammals
adaptive radiation of birds
emergence of modern fauna
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gptkbp:evidence
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gptkb:Chicxulub_crater
gptkb:shocked_quartz
iridium layer
tektites
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gptkbp:firstProposedImpactHypothesisBy
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gptkb:Luis_Alvarez
gptkb:Walter_Alvarez
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gptkbp:firstProposedImpactHypothesisYear
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1980
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|
https://www.w3.org/2000/01/rdf-schema#label
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K–Pg extinction event
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gptkbp:impactCraterAge
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about 66 million years
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gptkbp:impactCraterDepth
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about 20 kilometers
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gptkbp:impactCraterDiameter
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about 180 kilometers
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gptkbp:impactEnergyEstimate
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about 10^23 joules
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gptkbp:occurred
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approximately 66 million years ago
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gptkbp:otherPossibleCauses
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gptkb:volcanic_activity
gptkb:Deccan_Traps_eruptions
climate change
sea level fall
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gptkbp:percentageOfSpeciesExtinct
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about 75%
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gptkbp:significance
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beginning of Cenozoic Era
end of Mesozoic Era
major evolutionary turnover
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gptkbp:studiedBy
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geologists
paleontologists
astrobiologists
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gptkbp:survived
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amphibians
mammals
turtles
crocodilians
some fish
some plants
avian dinosaurs (birds)
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gptkbp:bfsParent
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gptkb:Cretaceous–Paleogene_extinction_event
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gptkbp:bfsLayer
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5
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