cretaceous cretaceous  /krɪ ˈteɪ ʃɪs/


  1. (n) from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants
  2. (adj) abounding in chalk
  3. (adj) of or relating to or denoting the third period of the Mesozoic era


  1. Back in the early cretaceous period, some 120 million years ago, a ferocious, flesh-eating creature roamed Thailand.
  2. Mammals are seldom found in cretaceous formations.


  1. Earthquake swarms; marine Ediacaran fossil traces; Alca obsidian; Mammoth Mountain

    ( Geological Society of America ) Studies in this latest batch of GEOLOGY postings cover tiny Ediacara organisms, CO2 gas following seismic swarms, the growth of Mount Everest, methane seeps, the remarkably modern character of Cretaceous seawater composition, geodynamic models of the assembly of Rodinia and Gondwana, and whether subduction zones are invading the Atlantic. Other studies cover the ...
    on June 10, 2013     Source: EurekAlert!

  2. The Sturgeon Fossil

    Sturgeon like fishes appeared in the fossil record approximately 200 million years ago, around the very end of the Triassic, making them among the most ancient of actinopterygian fishes. True sturgeons appear in the fossil record during the Upper Cretaceous. In that time, sturgeons have undergone remarkably little change, indicating their evolution has been exceptionally slow and earning them an ...
    on June 7, 2013     Source: Environmental News Network

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definition of cretaceous
meaning of cretaceous


  1. "T-rex has become such a fixture of Cretaceous lore, most people don't realize that no tyrannosaur ever set foot on a southern continent," said Sereno.
    on Feb 13, 2008 By: Paul Sereno Source: Science Daily (press release)

  2. "The evolutionary legacy of the end-Cretaceous extinction is very much with us. In fact, it can be seen in virtually every marine community, every lagoon, every continental shelf in the world," said University of Chicago paleontologist David...
    on Feb 5, 2009 By: David Jablonski Source: Science Daily (press release)

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