Devonian period

Definitions

  • WordNet 3.6
    • n Devonian period from 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites
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Usage

In literature:

We have an even greater difficulty here, as plant remains are not preserved at all until the Devonian period.
"The Story of Evolution" by Joseph McCabe
Palaeozoic or Primary Age: { Devonian } Age of Fishes { Silurian } with ten or twelve Periods.
"Atlantic Monthly, Vol. XII. July, 1863, No. LXIX." by Various
It was a much less strenuous time than the Devonian period; it was like a very long summer.
"The Outline of Science, Vol. 1 (of 4)" by J. Arthur Thomson
The next period of the Palaeozoic is known as the Devonian age, or the age of fishes.
"The Meaning of Evolution" by Samuel Christian Schmucker
In the Devonian period the cephalopods began to make a distinct advance in numbers, and in development.
"Encyclopaedia Britannica, 11th Edition, Volume 8, Slice 3" by Various
The trachyte of the Drachenfels was probably the neck of a volcano which burst through the fundamental schists of the Devonian period.
"Volcanoes: Past and Present" by Edward Hull
The volcanic outbursts which followed became feebler in the Devonian and Carboniferous periods and ceased with the Permian.
"Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 4" by Various
On top of the Devonian lies the "Carboniferous" series, which complete the series of the primary period.
"Nature's Miracles, Volume 1" by Elisha Gray
Fishes of ancient times; of the Devonian period.
"A Guide for the Study of Animals" by Worrallo Whitney
We have undoubted fossil evidence that winged insects lived in the Devonian and became numerous in the Carboniferous period.
"Encyclopaedia Britannica, 11th Edition, Volume 13, Slice 4" by Various
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