"ഫലകം:Period start" എന്ന താളിന്റെ പതിപ്പുകൾ തമ്മിലുള്ള വ്യത്യാസം
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വരി 3:
<!-- We can also include notable dates which are subject to change, e.g. Burgess shale-->
|burgess shale|mid middle cambrian<!--Mid middle is approximate; cf. Burgess Shale-->=508
|chengjiang=520<!--Must be in Stage 3. Current source required.-->
|sirius passet=
|doushantou=570
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