11_Age of Earth - Shock Metamorphism and Regoliths...

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Shock Metamorphism and Regoliths Questions for this lecture What are shock waves, how are shock pressures distributed in the target, and how do the rocks respond at different distances from the impact? What are shatter cones and where do they form? What are planar microstructures, diaplectic glass, and polymorphs? How is the intensity of shock metamorphism estimated? How do the T-P conditions of shock metamorphism compare to regional metamorphism? What is a regolith, and how do its constituents and properties change with maturity? What are the biologic consequences of a large impact on Earth?
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Age of the Earth and the Solar System ?
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Age of the Earth and the Solar System Questions for this lecture : How do radioactive age-dating schemes work? Why is the U-Pb dating system so powerful? What is the age of the Earth, how was it determined, and who first made this measurement? Why do we use refractory inclusions to date the age of the solar system, and what is its age? How are extinct radionuclides used to date early solar system materials and events? How can we date events like the Moon-forming impact and the Earth’s core formation?
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Detrital zircon crystal from Jack Hills, Australia; Age from Pb isotopes is 4.4 billion years The oldest known thing on Earth
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Decay of radioactive Rb (N) into its radiogenic daughter isotope (D), as a function of half lives.
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This note was uploaded on 11/10/2011 for the course GEOL 380 taught by Professor Mcsween during the Spring '11 term at University of Tennessee.

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11_Age of Earth - Shock Metamorphism and Regoliths...

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