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PlateTectIINOTES.docx - EES:1030 Plate Tectonics II Study...

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EES:1030Plate Tectonics IIStudy Guide Questions1.Can a single tectonic plate contain both oceanic and continental crust?2.How do oceanic and continental crust differ from each other?3.Know the different types of boundaries that we talked about today and theircharacteristics (topography, earthquake and volcanic activity, etc.). You should alsorecognize the examples that we talked about in lecture today (i.e., you should know thatthe Andes are at a convergent boundary).4.Given a description of the characteristics of a hypothetical boundary, be able to inferboundary type (for example, if I tell you I am studying a boundary with linear offsets offeatures on the Earth’s surface, no volcanoes and shallow earthquakes, you should be ableto tell me that this sounds like a transform boundary).5.Know which boundaries are destructive, conservative, and creative.6.Be familiar (very, very familiar) with Wadati-Benioff zones. You should recognize thename and be able to describe them. You should also know what they tell us about, interms of plate tectonics.7.What might you expect to happen to Africa in the next 50 million years, given what weobserve currently in its rift systems?8.What do hot spots tell us about, and what is a hot spot? Know the two examples fromlectures.Lecture DetailsBusiness-The first reading quiz and Guided Learning Exploration are due this Sunday, September 6that11:59 PM! Make sure to complete them by that time.Review: Recall, lithosphere is a mechanicalterm and crust is a chemicalterm.The Earth’s crust (the topmost part of the lithosphere) can be oceanic or continental, and the twocrust types have very different densities. This is going to be important for determining howtectonic plates interact.The complete theory of plate tectonics:tectonic plates (made up of rigid lithosphere- the crustand top part of mantle) move around on the ductile asthenosphere, form anew at mid oceanridges, and are subducted and recycled in trenches, where we observe a resulting pattern of deepearthquakes. We also have areas on the Earth where plates slide past each other.Interestingly, we still aren’t 100% sure how plate tectonics works (what portion of platemovement is due to mantle convection? Ridge push/slab pull?), but we know that it happens.

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Term
Fall
Professor
BradleyCramer

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