EESA06H3 Lecture Notes - Supercontinent, Laurasia, Magnetometer

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Eesa06 week 2 monday, january 13, 2014 lecture 2. Formation of planet earth 4 500 million years before present (4. 5 ga) Continental drift and pangea: 1912 (alfred wegener: alfred wegener german geologist. Sea floor spreading: 1960 (harold hess: bathometric map shows the depth of the water. Magnetic stripes on the ocean floor and wander paths for continents: 1965 (fred vine: fred vine graduate student. Mid ocean ridges and hot spots: 1965 (tuzo wilson: tuzo wilson professor of geophysics. Plate tectonics and wilson cycle: 1967 (tuzo wilson) Wegener proposed that continents moved by plowing through the sea floor . This hypothesis was rejected by most na geologists, accepted by most southern geologists. Pangea consists of laurasia (north america & parts of asia) and gondwana (southern. Striations scratches on the rocks surfaces caused by glacial ice sheets. If southern continents were put together, there as an ice cap in antarctica and it flows out to australia, india, and brazil (fig 1. 1)

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