What are Cretaceous?

  • (adj): Of or relating to the Cretaceous geologic era.
    Example: "Cretaceous rocks"
    See also — Additional definitions below


The Cretaceous ( /krɨˈteɪʃəs/, krə-TAY-shəs), derived from the Latin "creta" (chalk), usually abbreviated K for its German translation Kreide (chalk), is a geologic period and system from circa 145 ± 4 to 66 ± 0.3 million years (Ma) ago. In the geologic timescale, the Cretaceous follows the Jurassic period and is followed by the Paleogene period of the Cenozoic era. It is the last period of the Mesozoic Era, and, spanning 80 million years, the longest period of the Phanerozoic Eon.

Read more about Cretaceous.

Some articles on Cretaceous:

... during the early Campanian stage of the Late Cretaceous and went extinct during the Cretaceous–Paleogene extinction event at the Cretaceous–Paleogene boundary ...
... Coelosimilia is a genus of extinct scleractinian coral from the Late Cretaceous period ... Together, these areas would have been the continental shelves of the Late Cretaceous European continent ... The presence of Coelosimilia during the Late Cretaceous has been suggested as an indicator of a low ratio (less than 2) of Mg to Ca in Cretaceous seas ...
Life - End-Cretaceous Extinction Event
... There was a progressive decline in biodiversity during the Maastrichtian stage of the Cretaceous period prior to the suggested ecological crisis induced by events at the K–Pg boundary (K–T boundary) ... such as phytoplankton and land plants, formed the primary part of the food chain in the late Cretaceous ... At the end of the Cretaceous there seem to have been no purely herbivorous or carnivorous mammals ...
List Of African Dinosaurs - List of African Dinosaurs
... Abrictosaurus Jurassic herbivore — Aegyptosaurus Cretaceous herbivore — Aetonyx Jurassic herbivore Probably synonymous with Massospondylus Afrovenator Jurassic carnivore ...

More definitions of "Cretaceous":

  • (adj): Abounding in chalk.
  • (noun): From 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants.
    Synonyms: Cretaceous period