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Key events in the Carboniferous
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Viséan
Serpukhovian
Bashkirian
Moscovian
Kasimovian
Gzhelian
Asselian
Sakmarian
Artinskian
Kungurian
Tournaisian
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CRC
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Essex and Braidwood fauna
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Earliest polycyclic psaronius found
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Smaller psaronius type tree ferns found
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Symplocopteris, first example of tree fern, a zygopterid
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Key events of the Carboniferous Period.
Axis scale: millions of years ago.