Geologic Time and Earth History

Geologic Time and Earth History - Geologic Time and Earth...

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Geologic Time and Earth History
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Two Conceptions of Earth History: Catastrophism Assumption: Great Effects Require Great Causes Earth History Dominated by Violent Events Uniformitarianism Assumption: We Can Use Cause And Effect to Determine Causes of Past Events Finding: Earth History Dominated by Small- scale Events Typical of the Present. Catastrophes Do Happen But Are Uncommon
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Two Kinds of Ages Relative - Know Order of Events But Not Dates Civil War Happened Before W.W.II Bedrock in Wisconsin Formed Before The Glaciers Came Absolute - Know Dates Civil War 1861-1865 World War II 1939-1945 Glaciers Left Wisconsin About 11,000 Years Ago
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Absolute Ages: Early Attempts The Bible Add up Dates in Bible Get an Age of 4000-6000 B.C. For Earth John Lightfoot and Bishop Ussher - 4004 B.C. (1584) Too Short
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Absolute Ages: Early Attempts Salt in Ocean Rivers bring dissolved solids to ocean If we know rate salt is added, and how much salt is in ocean, can find age of
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Geologic Time and Earth History - Geologic Time and Earth...

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