ESS102H1 Lecture Notes - San Andreas Fault, Divergent Boundary, Drummond Matthews
Document Summary
Differences between 2 hypothesis sea-floor spreading accounts for the magnetic aspect. Sea-floor spreading made it into the 20th century. Harry hess mid 1900"s mapped deepest part of ocean found guyots = flat-topped mountains (as if tops were eroded but 2km below the surface) paper history of ocean. Basins 1960-2 explanation for guyots = new oceanic crust (& mantle) generated at. Mor guyots formed near mors and sink as the move away because ocean depth increases (aside, darwin - formation of coral reefs built up from submerged volcanoes, volcanoes had once broken above sea-level) What used to be a mountain just at sea-level moves further away from the mor: magnetic sea-floor anomalies. Fred vine, drummond matthews, lawrence morely 1963 explain magnetic bands along mors. Vine matthews hypothesis very difficult to read, Vine-matthews-morely hypothesis bands formed together at mor then separated as the mor created new rock that"s why you have the parallel lines.
