EESC 1175 Lecture : The Age of the Earth.docx
11 Mar 2014
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James ussher: age of the earth = 6,018 years old. Based on biblical events in the old testament, he found that the world was crated on october 23 rd , 4004 bc at 9 a. m: scientists" calculations, age of the earth = 4. 6 billion years old. Based on evidence found in rocks and radiometric dating. Rocks and geological time scale: oldest rocks = 4. 0 billion years old, oldest minerals = 4. 5 billion year old. Anthropocene = most recent period of time in earth history (past few hundred years) in which humans have significant global impact on the planet: paul crutzen. Holocene = last 10,000 years since the end of the last ice age. Relative age vs. absolute age: absolute age of the earth, when did the earth cool and solidify into its present state from the hot, Methods to estimating the age of the earth. Cooling of the earth from a molten state.
