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Definition of Cambrian period
1. Noun. From 544 million to about 500 million years ago; marine invertebrates.
Group relationships: Paleozoic, Paleozoic Era
Generic synonyms: Geological Period, Period
Lexicographical Neighbors of Cambrian Period
Literary usage of Cambrian period
Below you will find example usage of this term as found in modern and/or classical literature:
1. An Introduction to Historical Geology: With Special Reference to North America by William John Miller (1916)
"... CHAPTER VI THE Cambrian period THE Cambrian represents the earliest period of
the great Paleozoic era, and the rocks which make up the Cambrian system ..."
2. A College Text-book of Geology by Thomas Chrowder Chamberlin, Rollin D. Salisbury (1909)
"THE PALEOZOIC EKA CHAPTER XVI THE Cambrian period FORMATIONS AND PHYSICAL HISTORY
The great crustal movements which brought the Proterozoic era to a close ..."
3. An Introduction to Geology by William Berryman Scott (1907)
"CHAPTER XXVI PALAEOZOIC ERA —Cambrian period THE Palaeozoic is the oldest of the
three main groups into which the normal fossiliferous strata are divided; ..."
4. Elements of Geology by Eliot Blackwelder, Harlan Harland Barrows (1911)
"CHAPTER XIII THE Cambrian period The Cambrian rocks. ... it is evident that before
the Cambrian period began, most of North America had been for a time dry ..."
5. International Library of Technology: A Series of Textbooks for Persons by International Textbook Company (1908)
"The Cambrian period ushers in the Silurian period, or Invertebrate age. The rocks
are metamorphosed crystalline sandstone, slates, and schists, ..."
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