EESA06H3 Lecture Notes - Lecture 2: Paleomagnetism, Enhanced Data Rates For Gsm Evolution, Mantle Plume
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How planet earth evolves: continental drift vs plate tectonics key points: Formation of planet earth: 4,500 million years before present. (cid:858)mag(cid:374)etic stripes(cid:859) o(cid:374) the ocea(cid:374) floor a(cid:374)d (cid:858)(cid:449)a(cid:374)der paths(cid:859) for co(cid:374)ti(cid:374)e(cid:374)ts: (cid:1005)9(cid:1010)(cid:1009) (cid:894)fred. Mid-ocea(cid:374) ridges a(cid:374)d (cid:858)hot spots(cid:859): (cid:1005)9(cid:1010)(cid:1009) (cid:894)tuzo wilso(cid:374)(cid:895) Computer reconstruction of pangea by edward bullard (1965) Plate tectonics and the wilson cycle of supercontinents: 1967 (tuzo wilson); called a (cid:858)re(cid:448)olutio(cid:374) i(cid:374) earth scie(cid:374)ces(cid:859) Wegner proposed that continents moved by plowing through the sea floor which he called (cid:862)co(cid:374)ti(cid:374)e(cid:374)tal drift(cid:863) This hypothesis was rejected by most geologist. Pangea consist of: laurasia (north america and asia) and gondwana (southern. Looked at rock types of the same age. Igneous rocks deposited by volcanoes, sedimentary rocks= sediments of oceans, metamorphic to change subjected to heat and pressure, the environmental fingerprint has been changed. Matching rock types of the same age from one continent to another to reconstruct supercontinents. There wasn"t a mechanism to establish how the rocks moved.
