EESA06H3 Chapter 2: Chapter 2 Notes
Document Summary
Tectonics: the study of the origin and arrangement of the broad structural features of the. Earth"s surface, including not only folds and faults, but mountain ranges, continents, & earthquake belts. Plate tectonics: the earth"s surface is divided into several large, thick plates that move slowly and change in size; intense geologic activity occurs at plate boundaries. Concept was developed in the late 1960s by combining continental drift & sea floor spreading theories. Continental drift: idea that continents move freely over earth"s surface, changing their positions relative to each other. Sea floor spreading: idea that the sea floor forms at the crest of mid- oceanic ridges, then moves horizontally away from the ridge crest toward an oceanic trench. Noted in early 1900s that sa, africa, india, antarctica, & australia all had almost identical. People didn"t believe wegener at first because they thought that rocks were much too strong to be able to move about and crumple mountains, etc www. notesolution. com.
