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5 Cards in this Set
- Front
- Back
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Cambrian Period
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570 Million Years Ago
only aquatic life no chordates (spinal chord) |
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Devonian Period
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408 million years ago
land plants: ferns, trees were present insects some fish could venture forth on land |
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Carboniferous Period
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360 million ears ago
coal age great forests insects: dragonflies, roaches amphibians |
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Triassic period
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245 million years ago
dinosaurs appeared |
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Cenozoic Period
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66.4 million years ago
age of mammals la brea tar pits antelope, bison, horses, saber-tooth cats |
