EOSC 116 Lecture 1: eosc 116 notes.docx
1 Dec 2014
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Inner core- solid metallic composition: plate tectonics, grand unifying theory, the theory describes how the plates and the continents they contain are pushed and pulled around the surface of the earth ii. Plate boundaries: divergent (constructive, moving apart, mid atlantic. Notable b/c one of few observed on land: convergent (destructive, toward each other, collision, continent- continent collision. Chain of volcanic islands develops: ocean continent. Oceanic goes under it is more dense. Such as the cascades: transform, move past each other, most famous. North american plate moves past the pacific plate: rock classification. Igneous: crystalize from molten material, if cools at surface earth it"s called. Volcanic r extrusive: if cools inside the earth it is called. Plutonic or intrusive: cool slow so have very large crystals, metamorphic, formed by the alteration of pre-existing rocks using metamorphism. Process includes heat and/or pressure and often fluids: sedimentary, formed from a number of processes.
