[[File:Cambrian Trilobite Olenoides Mt. Stephen.jpg|thumb|300px|Ogyopsis klotzi from the Mt. Stephen Trilobite Beds (Middle Cambrian) near Field, British Columbia, Canada.; Photograph taken by Mark A. Wilson (Department of Geology, The College of Wooster), August 2009.]]
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==Useful links==
==Useful links==
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* [[Wikipedia:Cambrian|Cambrian (Wikipedia)]]
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* [https://en.wikipedia.org/wiki/Cambrian Wikipedia article]
* [http://www.ucmp.berkeley.edu/cambrian/cambrian.php University of California Museum of Paleontology article]
* [http://www.ucmp.berkeley.edu/cambrian/cambrian.php University of California Museum of Paleontology article]
* [http://science.nationalgeographic.com/science/prehistoric-world/cambrian/ National Geographic article]
* [http://science.nationalgeographic.com/science/prehistoric-world/cambrian/ National Geographic article]