Archaeology: General

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Cretaceous

A Dictionary of Earth Sciences | 1999 | | Copyright

Cretaceous Third of the three periods included in the Mesozoic Era. It began approximately 145.6 Ma ago and ended about 65 Ma ago. 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, and plesiosaurs. See K/T BOUNDARY EVENT.

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AILSA ALLABY and MICHAEL ALLABY. "Cretaceous." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 30 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "Cretaceous." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 30, 2012). http://www.encyclopedia.com/doc/1O13-Cretaceous.html

AILSA ALLABY and MICHAEL ALLABY. "Cretaceous." A Dictionary of Earth Sciences. 1999. Retrieved May 30, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-Cretaceous.html

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