Geological time scale, plants

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Last updated 11:15 AM on 6/12/26
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9 Terms

1
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Quaternary Period

0 – 1.8 Ma. Ice ages.

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Neogene Period

1.8 – 24 Ma. Establishment of regional differences in floras, including temperate floras and grasslands.

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Paleogene Period

24 – 65 Ma. First grasses, first horses, rapid diversification of mammals.

4
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Cretaceous Period

65 – 144 Ma. Extinction of dinosaurs, origin and diversification of Angiosperms.

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Jurassic Period

144 – 205 Ma. Rise of modern ferns, diversification of conifers.

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Triassic Period

205 – 248 Ma. Cycads and Ginkgos dominant. Massive biotic extinction at the Permian-Triassic boundary.

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Permian Period

248 – 295 Ma. Spread of upland floras into lowlands, demise of lowland swamps.

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Carboniferous Period

295 – 354 Ma. Major interval of coal formations, forest dominance by arborescent lycopods. First land winged insects, first land vertebrates.

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Devonian Period

354 – 416 Ma. Diversification of plants, first seed plants, first sharks.