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The top documents tagged [original number of atoms]
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Radiometric Dating. First Attempted in 1905 Compare U and Pb content of minerals Very crude but quickly showed ages over a billion years Skepticism about
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Radiometric Dating of Rocks 1896-1898 Radioactivity discovered by: Henri Becquerel and Marie and Pierre Curie
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Fossils and evolution Rates of deposition of sediments Cooling of the Earth from a molten state Radiometric Dating Methods for Estimating the Age of the
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James Ussher (mid 1600's) Georges Buffon (mid 1700s) Lord Kelvin (late 1800's) 75,000 yr 100 m.y. Charles Walcott (1893) 75 m.y. 4004 B.C
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Determination of the Age of the Earth (Second Method)
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To answer the question, “Why are mammoth bones found in northern Illinois?” one simply needs to look at the geologic cross sections in the area. Relative
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Determination of the Age of the Earth (Second Method)
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