EESA06H3 Lecture Notes - Very-Long-Baseline Interferometry, Mid-Ocean Ridge, Oceanic Trench
Document Summary
* tectonics study of the origin and arrangement of the broad structural features of the earth"s surface (folds, faults, mountain belts, continent & earthquake belts) * basic idea of plate tectonics the earth"s surface is divided into a few large, thick plates that move slowly and change in size. The 2 sides of the ridge are moving in opposite directions like slow conveyor belts. Early case for continental drift: wegener noted that south america, africa, india, antarctica & australia has almost identical late. Reassembled the continents to form a giant supercontinent = pangaea. If continents are arranged according to wegener"s pangaea reconstruction: glaciations in the southern hemisphere is confined to small area and the absence of widespread glaciations in the northern hemisphere becomes easier to explain. Pangaea laurasia (northern supercontinent) & gondwanaland (southern supercontinent) Laurasia (northern supercontinent: north america & eurasia. Gondwanaland (southern supercontinent: southern hemisphere continents & india. Reconstructed old climate zones (paleoclimatology) and the ancient sedimentary rocks.