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12 Cards in this Set
- Front
- Back
What are the 4 eons in the gts? |
1. Hadean 2. Archean 3. Proterozoic 4. Phanerozoic |
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What are the eras under Phanerozoic Eon? |
1. Paleozoic Era 2. Mesozoic Era 3. Cenozoic Era |
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What are the PERIODS under the Paleozoic ERA? |
1. Cambrian Period 2. Ordovician Period 3. Silurian Period 4. Devonian Period 5. Carboniferous Period 6. Permian Period |
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What are the PERIODS under Mesozoic Era? |
1. Triassic Period 2. Jurassic Period 3. Cretaceous Period |
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What are the PERIODS under Cenozoic? |
1. Paleogene Period 2. Neogene Period 3. Quaternary Period |
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What is the largest unit in the GTS? |
EON |
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What is the smallest unit in GTS |
Epoch |
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10-100 million years |
ERA |
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Not more than 100 million years |
Period |
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What are the geologic and Biological Events during the Hadean Eon? |
- Meteorite Bombardment - Severe magmatism and volcanic eruptions - NO LIFE |
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What are the geological and biological events during the Archean Eon? |
- formation of islands - existence of stromatolites (cyanobacteria/ blue green algae) |
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What are the geological and biological events during the Proterozoic Eon? |
- atmosphere with O2 - snowball earth |