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Geologic Age
Geologic Age
425.6 - 423.0 Ma
Eon / Era / Period
Eon / Era / Period
What happened during this time?
What happened during this time?
Record of tracheids ~425 Ma, and therefore more evidence of vascular plants, in the fossil record (Edwards & Davies 1976)
Macivera gracilis, a zosterophyll from Canada (Kotyk et al., 2002)
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