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Date: 2003-09-18 15:50:58Geologic time scale Cambrian explosion Anomalocaris Opabinia Hallucigenia Brachiopod Trilobite Marrella Cambrian Paleozoic Phanerozoic Burgess Shale fossils | 1 Cambrian ExplosionAdd to Reading ListSource URL: faculty.evansville.eduDownload Document from Source WebsiteFile Size: 123,21 KBShare Document on Facebook |