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Cretaceous

Hierarchy:Phanerozoic Mesozoic
  Cretaceous
Classification:Period (as per International Commission on Stratigraphy)
Top:66.0 Ma
Base:~145.0 Ma
Preceeds:Cenozoic Paleogene  Paleocene   Danian
Follows:Jurassic Late Jurassic  Tithonian
Primary Divisions:Late CretaceousEarly Cretaceous
FGDC code:K
Flowering plants proliferate, along with new types of insects. More modern teleost fish begin to appear. Ammonoidea, belemnites, rudist bivalves, echinoids and sponges all common.

Many new types of dinosaurs (e.g. Tyrannosaurs, Titanosaurs, duck bills, and horned dinosaurs) evolve on land, as do Eusuchia (modern crocodilians); and mosasaurs and modern sharks appear in the sea.

Primitive birds gradually replace pterosaurs. Monotremes, marsupials and placental mammals appear.

Break up of Gondwana. Beginning of Laramide and Sevier Orogenies of the Rocky Mountains. atmospheric CO2 close to present-day levels.
 

Geologic Events

Event NameTypeAgeArea
Chicxulub impactImpact Event66 MaYucatan peninsula, Mexico
Deccan Traps volcanism (begins)Volcanic Activity66.25 - 65.5 MaIndia
Kara impactImpact Event70.3 ± 2.2 MaRussia
Ontong Java Plateau secondary eruptions (concludes)Volcanic Activity~90 MaSouth Pacific
Kerguelen Plateau formation (begins)Volcanic Activity119 - 34 MaSouthern Indian Ocean
Ontong Java Plateau primary eruptionsVolcanic Activity125.0 - 124.6 MaSouth-west Pacific Ocean
Tookoonooka impactImpact Event128 ± 5 MaQueensland, Australia
Morokweng impactImpact Event145.0 ± 0.8 MaSouth Africa
Pangaea breakup (ongoing)Continental Breakup175 - 55 MaGlobal
Andean orogeny (ongoing)OrogenyMaximum Age: 200 MaSouth America
Laurasia supercontinent (ongoing)Supercontinent215 - 55 MaNorthern Hemisphere


Overview of geological time

List all geological events
Mineral and/or Locality  
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