EESA06H3 Lecture Notes - Lecture 2: John Tuzo Wilson, Mid-Ocean Ridge, Edward Bullard
4 Apr 2018
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Lec 02: how planet earth evolves: continental drift vs plate tectonics key points: Formation of planet earth: 4,500 million years before present - continental drift" and. Pangea: 1912 (alfred wegener) - sea floor spreading": 1962 (harold hess) - magnetic stripes" on the ocean floor and wander paths" for continents: 1965 (fred vine) Mid-ocean ridges and hot spots": 1965 (tuzo wilson) Computer reconstruction of pangea by edward bullard (1965) -plate tectonics and the. Wilson cycle of supercontinents: 1967 (tuzo wilson); called a revolution in earth sciences": re-assembling pangea (alfred wegener) Wegner proposed that continents moved by plowing through the sea floor which he called continental drift . This hypothesis was rejected by most geologist. Pangea consist of: laurasia (north america and asia) and gondwana (southern. Looked at rock types of the same age. Igneous rocks deposited by volcanoes, sedimentary rocks= sediments of oceans, metamorphic to change subjected to heat and pressure, the environmental fingerprint has been changed.
