Cretaceous period


  • WordNet 3.6
    • n Cretaceous period from 135 million to 63 million years ago; end of the age of reptiles; appearance of modern insects and flowering plants
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Webster's Revised Unabridged Dictionary
    • 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.
    • ***


In literature:

Eastern America, it may be recalled, is much higher than western until the close of the Cretaceous period.
"The Story of Evolution" by Joseph McCabe
The immense development of plants with the habit of Cycads, during the Mesozoic Period up to the Lower Cretaceous, has long been known.
"Darwin and Modern Science" by A.C. Seward and Others
Lastly, true Crocodiles are known to have existed in considerable numbers in the Cretaceous period.
"The Ancient Life History of the Earth" by Henry Alleyne Nicholson
Secondary Age: { Cretaceous } Age of Reptiles { Jurassic } with at least twenty Periods.
"Atlantic Monthly, Vol. XII. July, 1863, No. LXIX." by Various
All from the Cretacic period.
"Dinosaurs" by William Diller Matthew
Of the history of the Amazonian Valley during the periods immediately following the Cretaceous, we know little or nothing.
"The Atlantic Monthly, Volume 18, No. 105, July 1866" by Various
Gradually, however, they took a subordinate place, and by the close of the Cretaceous period the angiosperms had gained the upper hand.
"Encyclopaedia Britannica, 11th Edition, Volume 7, Slice 6" by Various
The Cretaceous Period of the earth's eventful history is named for the lime rock which we know as chalk.
"Earth and Sky Every Child Should Know" by Julia Ellen Rogers
Beds of sand, sandstone, limestone, belonging to the Cretaceous Period.
"Principles of Geology" by Charles Lyell
The eruptions began towards the close of the Cretaceous period and continue to the present day.
"Encyclopaedia Britannica, 11th Edition, Volume 5, Slice 6" by Various
And now following on these came our Wealden strata, the beginning of the Cretaceous period.
"The Geological Story of the Isle of Wight" by J. Cecil Hughes
F. Kossmat has shown that the Atlantic had substantially its present form during the Cretaceous period.
"Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 8" by Various
"A Manual of Elementary Geology" by Charles Lyell
The tertiary period began with the close of the cretaceous.
"A Manual of the Antiquity of Man" by J. P. MacLean
Denmark belongs to the Cretaceous period, as does also a large part of Russia between the Volga and the basin of the Dnieper.
"The New Gresham Encyclopedia" by Various
Following the Cretaceous period came the Tertiary period, during which the continent assumed very nearly its present outline.
"North America" by Israel C. Russell
These early mammals lingered on to so late a period as the Eocene; but the majority of the genera were Triassic, Jurassic, and Cretaceous.
"The Cambridge Natural History, Vol X., Mammalia" by Frank Evers Beddard
The fossils occur in rocks of the Secondary Period, from the Trias to the early Cretaceous.
"The Life of Crustacea" by William Thomas Calman
The great hiatus in our knowledge lies in the period between the Cretaceous and the Eocene.
"Encyclopaedia Britannica, 11th Edition, Volume 14, Slice 3" by Various

In news:

With its antediluvian palmettos, teeming sloughs and oxbow lakes, and mighty live oaks, a trip to Brazos Bend can feel like time-travel to the Cretaceous Period.
A period of violent tectonic thrusting during the Cretaceous reorganized the rocks into their current arrangement.
Purported Cretaceous period protester supporting civil rights of Lenny the Tyrannosaurus Bataar during federal court proceedings.
Taunting and name-calling go all the way back to the Cretaceous period, according to Donaldson's ( The Gruffalo ) tale of dinosaur species that don't see eye to eye.
A relentless dinosaur hunter unearths an entire ecosystem from the middle cretaceous period, not to mention some exotic new cousins of T. By Heather Pringle, Photography by Grant Delin.
A model of the head of Uberabatitan Ribeiroi, a Late Cretaceous period dinosaur, is seen at the Federal University, in Rio de Janeiro.
Ten years after its discovery, a vanishingly rare tree from the Cretaceous Period is a scientific darling and may soon become a commercial success too.
The geological time scale , with its familiar Cretaceous, Cambrian, and Eocene periods, works great as a calendar for the history of the Earth.
Those are the "Dinosaurs Unearthed " — 24 animatronic prehistoric creatures, five full-sized skeletons and nearly 40 fossil replicas and eggs from the Triassic, Jurassic and Cretaceous periods.

In science:

The main factors often cited as the reason that the latter part of the Cretaceous was one of the warmest periods in Earth’s history (e.g., ), are that the land mass did not occupy the poles and that the global sea level was highest than ever (thus moderating the temperatures).
The Spiral Structure of the Milky Way, Cosmic Rays, and Ice Age Epochs on Earth
Chicxulub impact structure in Yucatan Peninsula, in Mexico, has a diameter of about 200Km, was produced 65 million years ago at the end of Cretaceous Period and is thought to be linked to the dinosaur extinction.
Astrophysics datamining in the classroom: Exploring real data with new software tools and robotic telescopes
The classic example is that of the dinosaurs, whose extinction at the end of the Cretaceous period 65 million years ago cleared the way for the subsequent dominance of the mammals and eventually the evolution of the human race.
Simple models of evolution and extinction