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Related terms:
phyla
trilobite
geochemical
ediacaran
body fossils
cambrian
arthropods
ordovician
burgess shale
early cambrian
fossils
mass extinction
cambrian explosion
fossil record
multicellular
photosynthesis
extinction
million years ago
geology
Wikipedia sources: Cambrian explosion Paleontology Trilobite Animal Cambrian Context for words: trace fossils |
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