EESA06H3 Lecture Notes - Lecture 2: Francis Bacon, Bruce C. Heezen, Marie Tharp
Document Summary
North america and europe can be "fitted together": 1600 (francis bacon) Mid-ocean ridges and trenches: 1957 (marie tharp and bruce heezen) 1965 "wander paths" for continents (ted irving) and "magnetic stripes" on the ocean floors (fred vine. 1610 -> first suggestion that the continents had been together. Did not suggest that they had moved together. Looked at the coastlines of europe, western africa. Atlantic ocean had been separated through strong currents. Ancestral continents (before and after separation) -> 1858. No implication that the continents had been together and then drifted apart. Permanentism: continents are fixed in position connected by land bridges which sink to create oceans. Continents grew in size but did not move. Expanding earth model: result of earth expanding and stretching. Result of contraction, and shrinkage of the earth. Where continents drift as "sheets" that are moved by tidal forces. Recognized that the mountains were the result of continents moving.
