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Cretaceous period   /krɪtˈeɪʃɪs pˈɪriəd/   Listen
adjective
Cretacic  adj.  (Geol.) Of, pertaining to, or designating, the period of time following the Jurassic and preceding the Tertiary, generally given as from 144 million years b. p. to 65 million years b. p.. Also called.
Cretaceous acid, an old name for carbonic acid.
Cretaceous formation (Geol.), the series of strata of various kinds, including beds of chalk, green sand, etc., formed in the Cretaceous period; called also the chalk formation. See the Diagram under Geology.
Cretaceous period (Geol.), the time in the latter part of the Mesozoic age during which the Cretaceous formation was deposited, and at the end of which the dinosaurs died out. See Cretaceous.






Collaborative International Dictionary of English 0.48








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"Cretaceous period" Quotes from Famous Books



... years, which was close to maximum for an exploring expedition. They had entered eleven systems, and made landings on eight planets. Three had been reasonably close to Terra-type. There had been Fafnir; conditions there would correspond to Terra during the Cretaceous Period, but any Cretaceous dinosaur would have been cute and cuddly to the things on Fafnir. Then there had been Imhotep; in twenty or thirty thousand years, it would be a fine planet, but at present ...
— Naudsonce • H. Beam Piper

... cornerstone of the Rockies was laid. The geologic clock ticked out its centuries until the swamps of the Coal Period were full of Peter's Oldest Inhabitants in the form of Dinosaurs and then came the Cretaceous Period and the Great Architect looked down and bade the Rockies arise, and tooled them into beauty with His blue-green glaciers and His singing rivers, and touched the lordliest peaks with wine-glow and filled the azure valleys with music ...
— The Prairie Mother • Arthur Stringer

... to a time so remote that we cannot measure it even by hundred of thousands of years, and let us visit the territories of Utah and Wyoming. Those highlands were very different then from what they are now. Just risen out of the seas of the Cretaceous Period, they were then clothed with dense forests of palms, tree-ferns, and screw-pines, magnolias and laurels, interspersed with wide-spreading lakes, on the margins of which strange and curious animals fed and ...
— A Book of Natural History - Young Folks' Library Volume XIV. • Various

... is a well-marked old crest line extending from the Grizzly Peak Mountains on the north, in Plumas County, at least as far south as Pyramid Peak, in Eldorado County. At sometime in the later part of the Cretaceous period the first breaks took place, changing the structure of the range from symmetrical to monoclinal and outlining the present form ...
— The Lake of the Sky • George Wharton James

... the opinion of Von Buch and M. d'Orbigny, the two formations belong to the same age. I must here add, that Professor E. Forbes, who has examined my specimens from this place and from the Peuquenes range, has likewise a strong impression that they indicate the Cretaceous period, and probably an early epoch in it: so that all the palaeontologists who have seen these fossils nearly coincide in opinion regarding their age. The limestone, however, with these fossils here lies at ...
— South American Geology - also: - Title: Geological Observations On South America • Charles Darwin



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