Mesozoic Era

E8188

The Mesozoic Era was a major geological era, often called the "Age of Reptiles," during which dinosaurs dominated the land and the supercontinent Pangaea broke apart into modern continents.


Statements (47)
Predicate Object
instanceOf eon subdivision
geological era
biologicalInnovation diversification of reptiles
early diversification of mammals
evolution of true birds from theropod dinosaurs
origin of flowering plants
characterizedBy breakup of supercontinent Pangaea
dominance of dinosaurs on land
high sea levels for much of the era
warm global climate
climate generally greenhouse conditions
little to no polar ice for much of the era
duration about 186 million years
endedByEvent Cretaceous–Paleogene mass extinction
endTime about 66 million years ago
followedBy Cenozoic Era
follows Paleozoic Era
hasPart Cretaceous Period
Jurassic Period
Triassic Period
majorLifeForm ammonites
early angiosperms
early birds
early mammals
gymnosperms
marine reptiles
non-avian dinosaurs
pterosaurs
massExtinctionCount two major mass extinctions at its boundaries
nicknamed Age of Dinosaurs
Age of Reptiles
notableEvent appearance of the first flowering plants
extinction of non-avian dinosaurs at its end
rise and radiation of dinosaurs
oceanLife abundant ammonites and belemnites
diverse marine reptiles such as ichthyosaurs and plesiosaurs
paleogeography continents initially united as Pangaea
further fragmentation into modern continents
progressive separation into Laurasia and Gondwana
partOf Phanerozoic Eon
precededByEvent Permian–Triassic mass extinction
startTime about 252 million years ago
stratigraphicUnit middle era of the Phanerozoic Eon
tectonicProcess formation of modern continental configurations
opening of the Atlantic Ocean
rifting of Pangaea
timeScalePosition between 252 and 66 million years ago


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