Seafloor spreading

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Ngày đăng: 29/11/2016, 22:46

Today’s Lecture: Review Plate Margin Types with Slides and Videos Quiz on Monday preceded by review session PLATE TECTONICS Overview PLATE TECTONICS Plate boundaries types ● divergent boundaries ● convergent boundaries ● transform fault boundaries Source of “mantle upwellings” Hawai’i ridg e le t n ma re o c Hotspots (like Hawai’i) (probably from core-mantle boundary) Ridges: probably shallow (upper mantle source) Distribution of Earthquakes ●ocean crust structure: pillow basalts, sheeted dikes, gabbro PLATE TECTONICS 3) Supporting evidence
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