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About: End-Botomian mass extinction     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : yago:WikicatExtinctionEvents, within Data Space : dbpedia.demo.openlinksw.com associated with source document(s)

Type: yago:Abstraction100002137yago:Event100029378yago:PsychologicalFeature100023100yago:YagoPermanentlyLocatedEntityyago:WikicatExtinctionEvents New Facet based on Instances of this Class

The end-Botomian mass extinction event, also known as the late early Cambrian extinctions, refer to two extinction intervals that occurred during Stages 4 and 5 of the Cambrian Period, approximately 513 to 509 million years ago. Estimates for the decline in global diversity over these events range from 50% of marine genera up to 80%. Among the organisms affected by this event were the small shelly fossils, archaeocyathids (an extinct group of sponges), trilobites, brachiopods, hyoliths, and mollusks.