'Uniformitarianism' presentation slideshows

Sedimentology and Sedimentary Processes

Sedimentology and Sedimentary Processes. Virginia T. McLemore. Sedimentology. "The scientific study of sedimentary rocks and of the processes by which they were formed; the description, classification, origin and interpretation of sediments" (Glossary of Geology, AGI, 1974)

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Theories of Evolution

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Geologists

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Lecture 8a: Stratigraphy, Paleomagnetism

Lecture 8a: Stratigraphy, Paleomagnetism. Questions How is stratigraphy related to analysis of sedimentary environments? What happens when sea-level varies? How do variations in the terrestrial magnetic field get recorded in rocks and used by geologists to reconstruct history? Reading

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The Rock Record

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Sedimentary Rocks

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What do you think this is?

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Uniformitarianism Versus Catastrophism

Uniformitarianism Versus Catastrophism. Page 234in your textbook. The Principle of Uniformitarianism. Scientist James Hutton, the author of Theory of the Earth, proposed that geologic processes such as erosion and deposition has occurred on the Earth over time. This process takes a long time.

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Laws of Geologic History

Laws of Geologic History. Law of Superposition . The oldest layer is at the bottom and the youngest layer is at the top. Law of Crosscutting - In a series of horizontal sedimentary beds, if there is an inclusion which cuts vertically through them, it must be younger than the sediment beds.

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KEY CONCEPT There were theories of biological and geologic change before Darwin.

KEY CONCEPT There were theories of biological and geologic change before Darwin. Early scientists proposed ideas about evolution. . Evolution is the biological change process by which descendants come to differ from their ancestors.

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Early Ideas about Evolution

Early Ideas about Evolution . Early Ideas about Evolution. Aristotle (384-332BC) Theory of Spontaneous Generation : Organisms could originate from non-living matter. Flooding of the Nile river left muddy soil followed by an emergence of frogs. Conclusion: Frogs come from muddy soil.

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Explain Uniformitarianism (2-3 sent):

Names:. Uniformitarianism vs. Catastrophism. Explain Uniformitarianism (2-3 sent):. Explain Catastrophism (2-3 sent):. (Type answer in here). (Type answer in here). Picture:. Picture:. Relative Dating vs. Absolute Dating. Explain RELATIVE DATING (2-3 sent):.

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