|Geology 12 - Historical Geology|
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1. The Western Cordillera of North America has a terribly complicated tectonic history throught the Mesozoic and Cenozoic. Describe the change in plate configurations in this part of the world from the Jurassic to the Eocene to the present. What is the evidence for each step of the history you are describing?
2. The East Coast of North America (Appalachian region) had a violent history throughout the Paleozoic. Describe the evolution of the East Coast from the Cambrian to the Permian, giving the evidence for each step of the history. Feel free to use a chart if that helps your organization.
3. Although the continents are well spaced around the globe today, geologists say that in the Late Paleozoic all the world's continents were assembled into a single supercontinent, Pangaea. What is the evidence 1) that this continent existed, 2) that it finished forming in the Late Paleozoic, and 3) that it broke up again in the Triassic?
4. Marine life undergoes two major changes in the Phanerozoic: from the Cambrian to the rest of the Paleozoic, and from the Paleozoic to the Mesozoic, with a minor change going into the Cenozoic. Describe the big patterns of life in each of these periods and the organisms that dominated in each of these times (Cambrian, Middle and Late Paleozoic, Mesozoic)
5. What is the evidence for the impact hypothesis and for the volcanic hypothesis for the Cretaceous extinctions?
6. Multicellular life barely survived the Permian extinction event. Describe in detail at least three possible causes of the extinction, and the evidence supporting each.