EESA06H3 Lecture 2: Plate Techtonics

• School: UTSC
• Department: Environmental Science
• Course: EESA06H3
• Professor: Michael Ekers

Document Summary

Eesa06 lecture 2 continental drift vs plate tectonics. How planet earth evolves: continental drift vs plate tectonics. Formation of planet earth: 4500 million years before present. (cid:862)co(cid:374)ti(cid:374)e(cid:374)tal drift(cid:863) a(cid:374)d pa(cid:374)gea : 1912 alfred wegener: (cid:862) ea floor spreadi(cid:374)g(cid:863): (cid:1005)9(cid:1010)(cid:1006) (cid:894)harold hess(cid:895) (cid:862)mag(cid:374)eti(cid:272) stripes(cid:863) o(cid:374) the o(cid:272)ea(cid:374) floor a(cid:374)d (cid:862)(cid:449)a(cid:374)der paths(cid:863) for (cid:272)o(cid:374)ti(cid:374)e(cid:374)ts : (cid:1005)9(cid:1010)(cid:1009) (cid:894)fred. Mid o(cid:272)ea(cid:374) ridges a(cid:374)d (cid:862)hot spots(cid:863): (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:862)re(cid:448)olutio(cid:374) i(cid:374) earth s(cid:272)ie(cid:374)(cid:272)es(cid:863) Important to note the difference between continental drift and plate tectonics: continental drift - old idea, pangea - idea that was advanced in 1912 by alfred wagner. Early 17th century - mercantilism (global trade beginning) Maps being generated for the first time for selling. Francis bacon looked at the maps and thought that some of the continents seemed like they had been together at some point.