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Lecture 8

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Environmental Science
Nick Eyles

EESA06 Lecture 8 Page 1EESA06 Lecture 8Japan Earthquake Pacific plate going beneath the Philippine plate both going underneath Japanese mainland Tokyo is dangerous Tsunami wave height was low butJapan as a whole moved east 25metresnormal is 253cmyearo plates were locked build up of stress and energyo recurrence intervalplates locked for 1000years superquakesvertical upliftis what killed peopletsunami and lowered shorelineGeologic Time and Stratigraphy The Earth is 456 Billion Years OldHow did we find this out 1 Early idea on stratigraphy the study of rock layers as in a book2 How layers get bentbroken lost chapters 3 Relative age of rocks this one is older than 4 Absolute age isotopic age dating ex 50 million years 5 The Geological Timescale 456 to today similar to a book Ancient Greeks recognized fossils embedded in rocks now on top of mountains How did they get thereuplifted Stratabeds older at bottom deposition and accumulation of older layers o Can use these to correlate rocks from one location to another o Aliogeographytrying to find out what it was like in ancient timesDiluvium Meaning of a floodAfrica was moving towards North America collided with east coastStrict biblical interpretation of earths historyrocks and landscapes result from Noahs FloodMore than one flood recognizednew life created each time so each layer contains different life formsArchbishop Ussher 15811625 th Declared in 1625 that Earth formed at 9am on October 26 4004BConly 6000 years old Based on counting generation in the BibleButGeorgius Agricola 14941555father of mining geologyRecognizes that fossil remains are of marine organisms in 1531 Nicolas Steno 163186mountains can be raised and lowered land can be conveyed from one place to anotherThe Scottish Enlightment c17301830Industrial Revolution more rational beliefsJoseph Black Pioneer Chemist James Hutton Farmer interest in soil formation Adam Smith Economist Free Trade James Watt Steam Engine Energy Walter Scott WriterAn English visitor to Edinburgh remarked here I stand at what is called the Cross of Edinburgh and can in few minutes take 50 of genius and learning by the hand Rational outlookscience basedIndustrializationMapping of Oil shale rocks building of canals
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