Cambrian Period Phanerozoic

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trilobites


the cambrian first period of paleozoic era , starts 541 to 485 million years ago. cambrian sparked rapid expansion in evolution in event known cambrian explosion during greatest number of creatures evolved in single period in history of earth. plants algae evolved, , fauna dominated armored arthropods, such trilobites. marine phyla evolved in period. during time, super-continent pannotia began break up, of later recombined super-continent gondwana.








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