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cambrian stage 2 in a sentence

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  • Its earliest occurrence in Yunnan dates to the Upper Meishucunian ( ~ Tommotian / Cambrian Stage 2)
  • Graham Budd synthesises various schema to produce a compatible view of the SSF record of the Cambrian explosion, divided slightly differently into four intervals : a " Tube world ", lasting from, spanning the E-?boundary, dominated by Cloudina, Namacalathus ans pseudoconodont-type element; a " Sclerite world ", seeing the rise of halkieriids, tommotiids, and hyoliths, lasting to the end of the Fortunian ( c . 525 Ma ); a brachiopod world, perhaps corresponding to the as yet unratified Cambrian Stage 2; and Trilobite World, kicking off in Stage 3.
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