EESA06H3 Lecture Notes - Lecture 2: Mid-Ocean Ridge, Continental Crust, Oceanic Crust
Document Summary
Very little in geoscience makes sense without the theory of plate tectonics. >>>history (earlier theories and the development of plate tectonic theory) >contracting earth theory (de beaumon thought that the earth was shrinking as it was cooling) Inconsistency #1: scientists found evidence of ice cover in areas where there are no ice now, and these areas are strangely distributed. (eg. africa) however when you move the contents together, the glacial evidence makes sense. Inconsistency #4: mountain belts along the continental margins/edges. Inconsistency #5: ->>isostacy: force balance: the weight is balanced by buoyancy. The amount found under water depends on density and weight. Expanding earth theory (the continents look like they t together so maybe at one point they were and the earth is expanding and that"s why the continents are now separated) By alfred wegener, a meteorologist, not even a geologist, what a troll.
