Template:Period start
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Revision as of 14:56, 3 January 2023 by imported>Fire (Created page with "<includeonly>{{#expr:{{#switch: {{Period id|{{{1|{{PAGENAME}}}}}}} <!-- Some other notable dates --> |burgess shale|middle middle cambrian<!--Middle middle is approximate; cf. Burgess Shale-->=508 |chengjiang=518 |sirius passet=518 |doushantou=570 <!-- Data from ICS chart | Supereon | Eon | Era | Period | Epoch/Series | Age/Stage | other division (other sources - not in ICS chart) The names from the ICS chart are always first...")
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