EESA10H3 Lecture Notes - Lecture 2: Paradigm Shift, Glacial Erratic, Divergent Boundary
22 Oct 2017
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Eesa06h3: lecture 02 how planet earth evolves: continental drift vs plate tectonics. Formation of planet earth: 4,500 million years before present. (cid:858)magnetic stripes(cid:859) on the ocean floor and (cid:858)wander paths(cid:859) for continents: 1965 (fred vine) Mid-ocean ridges and (cid:858)hot spots(cid:859): 1965 (tuzo wilson) Computer reconstruction of pangea by edward bullard (1965) Plate tectonics and the wilson cycle of supercontinents: 1967 (tuzo wilson); called a (cid:858)revolution in earth sciences(cid:859) Maps being generated during this time showing what the earth looks like. Pangea: all the lands: consists of n. america and asia, gondwana (southern continents) Wegener proposes that continents were plowing through the ocean floor which he called (cid:862)continental drift(cid:863), and thought the spinning process of the planet was the driving force (mechanism) for continental drift. Matching rock types of the same age from one continent to another to reconstruct supercontinents. Reassembled pangea and looked at rock types of the same age.
