ESS102H1 Study Guide - Final Guide: Edmond Halley, Mount Vesuvius, Exhalation
Document Summary
Charles darwin the evolutionist observation (common sense) Lord kelvin the physicist theory (precise calculation) (the 2 different ways of doing science) Estimated age of the earth: 2 billion yrs. Glacial boulders edward lhwyd catalogued fossils estimated that one rock fell every 20 yrs. Estimated age of the earth: more than 200,000 (but boulders could have been thrown down the slopes by the flood) so inaccurate. Saltiness of the ocean edmund halley 1715 said salt content of the oceans can determine age. John joly irish 1900s - developed radiotherapy calculated age of earth from sodium content in oceans. Sodium supplied at constant rate from dissolution of rocks 3. Estimated age of the earth: 95 +/- 5 million years. Accumulation/erosion of sediments herodotus 450bc studied nile and red sea red sea would fill up with silt in 5,000 yrs. John phillips mid 1800s calculated how long it took sedimentary rocks to accumulate in ganges basin.
