ES Chapter 21-14 Phanerozoic Eon Notes

ES Chapter 21-14 Phanerozoic Eon Notes - (Mid December) Age...

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Chapter 21-24 Visible Life
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Phanerozoic Eon – “visible life” 1. Paleozoic Era (old life) 2. Mesozoic Era (middle life) 3. Cenozoic Era (recent life)
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Paleozoic Era 570 mya to 225 mya (November and part of December on our calendar) Trilobites were common animals (see p. 287)
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Paleozoic Era Sea scorpions (2 m). Land plants appeared in middle Paleozoic. Sharks, rays, and bony fish existed. Tropical jungle like forest were prevalent by the end of the era. Insects (some huge) were the predominant animals.
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Mesozoic Era 225 mya – 65 mya
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Unformatted text preview: (Mid December) Age of the Reptiles Dinosaurs roamed Earth. Birds and mammals started evolving during the last part of the Mesozoic. Cenozoic Era Recent Life (65 mya to present) (Last few days on our calendar.) age of mammals Ice Age began 3 mya (on New Years Eve.) Took 75000 years to form, stayed 10000 years, then retreated. Man evolved at 10:30 pm on New Years Eve. Geologic Time Scale Eons (divided into) Eras (divided into) Periods (divided into) Epochs...
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ES Chapter 21-14 Phanerozoic Eon Notes - (Mid December) Age...

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