EESA06H3 Lecture Notes - Lecture 2: Seafloor Spreading, Frederick Vine, Exploration Geophysics
Document Summary
Week 2: lecture #2: monday january 12, 2015. How planet earth works: continental drift vs plate tectonics. Paradigm: revolution in thinking, major shift in ppl"s attitude (digital age) Formation of planet earth: 4,500 million years before present. Introduced the term continental drift" and pangea: 1912 (alfred wegener) Magnetic stripes" on the ocean floor and wander paths" for continents: 1965 (fred. Mid ocean ridges and hot spots": 1965 (tuzo wilson) Plate tectonics and the wilson cycle of supercontinents: 1967 (tuzo wilson) Tuzo wilson; the father of plate tectonics. Polymath: jack of all trades, very good at a lot of things alfred wegener. Wegener proposed that continents moved by plowing through the sea floor continental. This hypothesis was rejected by most geologists. Gondwana (southern continents) figure 1. 1 (pg 3) Diff organism existing in diff continents, evidence that they were one tgt. 1960s, ppl thought ocean floor was deep and flat, but then they applied geophysics.
