6.Dating & fossilization

6.Dating & fossilization - Yosemite Sequoia More...

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Charles Darwin On the Origin of Species (1859) Speciation by Natural Selection “Descent with Modification” Evolutionary Fitness Not Progressive
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Darwin synthesized earlier views by incorporating: A biblical creator as an initiator and monogenesis. Linnaean homologies to deduce common ancestry. Malthusian competition. Lamarkian environmental force. Cuvier’s extinction. Cuvier’s anatomical metrics. Lyell’s Uniformaterianism gave Smith’s faunal succession sufficient time.
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Fossil deposition
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Fossilization: something best avoided
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Fossil Frequencies
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Fossilization Permineralization Replacement and recrystallization Compression Fossils
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Relative Dating Paleo Magnetism
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Chronometric/Absolute Dating Dendo-cronology
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Unformatted text preview: Yosemite Sequoia More than 2K YBP Chronometric/Absolute Dating Radioactive Decay Radiometric Dating Radio Carbon dating Half-Life The time it takes for an element to lose half its radioactive energy Constant, proportional rates accelerator mass spectrometer Potassium-Argon dating Half-life of 1.33 Million years, 10K~3Billion years B.P. Thermo-luminescent/ESR Dating 80K to 10M YPB Many Perspectives & Revision 1470 An ancestor or not? Original K-40/Ar-40 date: 2.9mya Index Fossil: recent Pig tooth near fossil Sample of volcanic ash contaminated Re-test ash, revised date: 1.8mya Importance: co-existing species of Homo rudolfensis. Dating Deep Time...
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6.Dating & fossilization - Yosemite Sequoia More...

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