EESB15H3 Lecture Notes - Craton, Uniformitarianism, Laurasia
Document Summary
Na craton: core of continent, old crust that"s built. The east and west coast are younger and added after craton was built. Geologic theory history: persian geologist avicenna: mountains had not always been there but took events in time, predating humans (11th century, shen kuo thought earth was very old (11th century) In the west : most theories based on christian religion , in 1800s the church dictated age of earth. Archbishop usher from ireland dated earth based on famous people"s life span , said earth was 5600 years old. When sediment is found (till), when marine fossils are found in the mountains, is caused by floods: george cuvier ( french) : looked at fossils and didn"t find transitional fossils of mammals. He didn"t believe in evolution slowly overtime, but rather violent big events like meteor . didn"t find difference in fossils of cats of his time and ancient egypt , believed in.
