[GEOL 1020] - Final Exam Guide - Everything you need to know! (72 pages long)
29 Nov 2016
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Principle of radioactivity -- what is it? o. Closed within a mineral, decay which leads to daughter product. 1. mythological estimates: animism, babylonian, hinduism, judaism, zoroastrianism, christianity: all give rather different estimates based on religious teachings and interpretations. These are ideas that are faith-based and untestable: salts in the ocean. ), would take 90 ma to get the ocean this salty. a. However, it is well known that salt is constantly being recycled, so ocean is now in a steady state. a. i. Why assume that fresh water started salty? a. i. 1. 2. rates of sediment accumulation: estimates typically <100 ma, inaccurate because record is full of gaps, unconformities could be up to billions of years old! a. i. 2. earth"s temperature: great challenge to geologists in the 19th c. <40 ma. Refuted by the discovery of radioactivity in the late 19th century. a. i. Math was done wrong and it shows that there was 4 billion years.
