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Millions of years ago Era Period Quaternary Cenozoic 1.6 Tertiary 66.4 Cretaceous 144 Mesozoic Jurassic 208 Tnassic 245 Permian 286 Pennsylvanian Carboniferous 320 Mississippian 360 Paleozoic Devonian 408 Silurian 438 Ordovician 508 Cambrian 570 Precambrian Which method is most likely used to identify what happened before the start of'the Paleozoic era?
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Millions of years ago Era Period Quaternary Cenozoic 1.6 Tertiary 66.4 Cretaceous 144 Mesozoic Juras...
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