third of the three periods included in the Mesozoic Era It began approximately 144 Ma and ended about 65 Ma It is noted for the deposition of the chalk of the white cliffs of Dover, England, and for the mass extinction of many invertebrate and vertebrate stocks Among these were the dinosaurs, mosasaurs, ichthyosaurs, plesiosaurs
from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants of or relating to the Cretaceous geologic era; "cretaceous rocks"
The final geological period of the Mesozoic It lasted from 140 Ma until 65 Ma ago This is the period that saw the dinosaurs (except the birds!), pterosaurs and the ammonites die out Named after the Latin (Creata) for chalk, due to the large chalk deposits laid down in Western Europe during this period
A geological term denoting the interval of Earth history beginning around 145 million years ago and ending 65 million years ago with the formation of the Chicxulub impact structure
the geologic period dating from 144million years ago to 65million years ago Noted for its deposition of chalks seen at the White Cliffs of Dover