GEOL 102 1st Edition Lecture 7 Outline of Last Lecture II. Zones within the earthIII. lithosphereIV. AsthenosphereV. Glass BlowerVI. Oceanic lithosphere Outline of Current Lecture VII. Continuum of ocean lithosphereIX. Continental lithosphereX. IsostacyXI. Why are ocean basins present?XII. Understanding shapes of the oceans and ocean floorsCurrent LectureVIII. Continuum of oceanic lithospherea. High densityb. Thini. 0-70 kmIX. Continental lithospherea. Continent b. Granite rock typei. Crystallized from a molten rockii. Course-grained igneous iii. Crystallized slower than the basalt found in oceanic lithosphere1. Can see the grains, so it crystallized quicklyc. Light colored i. Low in Fe, Mgii. High in Sid. Low density e. Thicki. 70-100 kmThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.X. Isostacy a. The lithosphere is floating on the asthenosphere b. Lithosphere sinks down into athenosphere until it displaces its weightc. Once the weight of the object is displaced (moved out of the way) it floats XI. Why are ocean Basins present? ***a. Oceanic lithosphere is thinner b. Isostacyc. Oceanic lithosphere is more dense, so it will sink more XII. Understanding shapes of oceans and ocean floorsa. Continental drifi. Wegner proposed this is 19151. German meteorologist ii. What evidence could we use to prove this hypothesis?1. Similar rocks on divergent continents 2. Similar fossils/ life forms “ “ 3. If it fits togetheriii. Antarctica 1. Found coala. Coal is formed in swamps when plants fall in and die b. The fossil leaves within that were identical to those in NewZealand, which has a dramatically different climate than
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