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University of California Museum of Paleontology introduction to the Cambrian. ... The Cambrian Period marks an important point in the history of life on earth; it is the time when most of the major groups of animals first appear in the fossil record. This event is sometimes called the "Cambrian Explosion",
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Almost every metazoan phylum with hard parts, and many that lack hard parts, made its first appearance in the Cambrian. The only modern phylum with an adequate fossil record to appear after the Cambrian was the phylum Bryozoa, which is not known before the early Ordovician.
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Cambrian - Wikipedia, the free encyclopedia
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An intro to the Cambrian Period, includes a review of each of the geological sub-divisions and the various forms of life that lived during this time ... A mid Cambrian scene, a reconstruction of the famous Burgess Shale site in what is now British Columbia, Canada. In the foreground a swimming Laggania cambria has captured...
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Cambrian explosion - Wikipedia, the free encyclopedia
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Cambrian: the beginning of the Paleozoic Era. ... Animals with hard-shells appeared in great numbers for the first time during the Cambrian. The continents were flooded by shallow seas. The supercontinent of Gondwana had just formed and was located near the South Pole.
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Serving west San Jose students, and information on administration, directory of schools, and contact numbers. ... Cambrian School District is made up of five schools nestled in a four square mile area in West San Jose. Cambrian is a place where you can expect:
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1. When did the Cambrian period take place? ... The Cambrian period began with the retreat of the Proterozoic ice at the end of an ice age. The period ended with many small mass extinctions, which were possibly caused by ocean temperature cooling, and culminated in a mass extinction which killed off a number of unique taxa.
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Pamela Gore's article about the Cambrian fossil record. ... Precambrian-Cambrian Transition ... Placement of Precambrian-Cambrian boundary is problematic; usually below "shelly" faunas. Originally at first trilobites.
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This stunning and unique evolutionary flowering is termed the "Cambrian explosion," taking the name of the geological age in whose early part it occurred. But it was not as rapid as an explosion: the changes seems to have happened in a range of about 30 million years, and some stages took 5 to 10 million years.
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