Geologic Timeline
Period/Epoch
AGE
(Millions
of years
ago)
Relative
Time
Extant Divisions
that Evolved

Silurian/
439-409
Middle
Psilophyta
Late
Lycophyta
Devonian/
409-363
Middle
Pterophyta
Middle
Bryophyta
Late
Sphenophyta
Carboniferous/Mississippian
363-325
Early
Coniferophyta
Carboniferous/Pennsylvanian
325-290

Cycadophyta
Triassic/
245-208
Middle
Gnetophyta
Jurassic/
208-145
Early
Ginkgophyta
Cretaceous/
145-65
Middle
Anthophyta
Late
Antherocephyta

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