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Lecture 5 - Lecture notes for Geosciences...

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Lecture notes for Geosciences 040-Arthur/Marone (copyright Pennsylvania State University, 2005) September 13th, Lecture 5 Reading: Chapt. 6 in Garrison The Physical Properties of Seawater. Water, The Wonder Substance But first, some slides that we did not get to last lecture and a brief review of The Origin of Ocean Basins Check out the plate motion history animation for past 200 million years Some important Questions to Consider (find the answers and rephrase these in the form of multiple choice questions): Are the ocean basins static and unchanging in size and shape through time? What is the approximate age of the oldest oceanic crust in present-day ocean basins? Why is there no oceanic crust older than this? What is the "Wilson Cycle"? What are some important lines of evidence that demonstrate seafloor creation at the midocean ridge? What processes drive plate tectonics? What major changes occur as seafloor ages?
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