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Several invertebrate groups - PowerPoint PPT Presentation

Earth Systems 3209

Earth Systems 3209. Reference: Chapters 6, 8; Appendix A & B. Unit: 2 Historical Geology . Unit 2: Topic 4.2 . Life Forms and Geologic Time. Focus on . . . recognizing that the Phanerozoic Eon represents the emergence of the first visible life in rocks.

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Warm Up 1/15/08

Warm Up 1/15/08. The most common Precambrian fossils are layered mounds of calcium carbonate called ____. a. prokaryotes c. stromatolites b. trilobites d. chert Most of the molecular oxygen in the early atmosphere of Earth resulted from a. decaying primitive plants and animals.

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639 views • 18 slides

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Several invertebrate groups - PowerPoint PPT Presentation

Earth Systems 3209

Warm Up 1/15/08