W10_103_5c_time

W10_103_5c_time - Absolute Dating & The Age of the Earth...

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Absolute Dating How do we know how old rocks are? 3.96 Billion Year Old Gneiss Age of the Earth: Originally Based on Mythology Han Chinese Tradition: 23 Million Year Cycle Buddhist Tradition: In f nite Age (Cyclic)
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Archbishop James Ussher (1654) (1625-1656) 4004 BC October 23 9:00 AM Most scienti f c attempts are based on principle that: Age (Time) = Amount of Change Rate of Change Requires: 1. Natural Process 2. Occurs at a Constant Rate 3. Leaves a Geologic Record
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Georges Louis Leclerc Comte de Buffon (1779) 75,000 yrs Cooling of Molten Ball 1707-1788 William Thomson, Lord Kelvin (1862) (1824-1907) Cooling of Molten Ball 20-400 Million yrs
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John Joly (1899) Saltiness of the Oceans 90 Million yrs (1857-1933) John Phillips (late 1800’s) Accumulation of Sedimentary Rocks About 100-500 Million yrs
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George Darwin (late 1800’s) Evolution of the Moon About 100 Million yrs (1845-1912) The Discovery of Radioactivity (1896) Antoine Henri Becquerel Marie and Pierre Curie
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Becquerel’s Mistake Uraninite - Uranium Ore
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This note was uploaded on 01/11/2012 for the course GEO 103 taught by Professor Robviens during the Winter '10 term at Bellevue College.

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W10_103_5c_time - Absolute Dating & The Age of the Earth...

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