ESCI 401 Lecture Notes - Lecture 5: Bruce C. Heezen, Mesosaurus, Oceanic Crust
8 Sep 2017
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What observations lead to the continental drift hypothesis, plate boundaries, convergent, subduction zone, i. e. : an oceanic plate submerging under an overriding continental plate (causes a thrust earthquake: normal faulting earthquake: the opposite of a thrust earthquake, a plate rises from under a falling plate, i. e. : mexico"s recent 2017 8. 1m earthquake: divergent. 1926: wegener just didn"t have his facts straight enough to convince anyone, he had the continents moving much too fast. 1962: harry hess, he proposed that continents do drift apart and new seafloor forms between them. 1963: two groups, vine and matthews, morley and larochelle, they realized that seafloor magnetic anomalies were a test of the seafloor spreading. 1965: j tuzo wilson, described tectonics around the globe in terms of rigid plates moving over earth"s surface including the basic types of plate boundaries. 1968: fairly complete model: plate tectonics! ix.
