Lab 2. Plate Tectonics - Plate Tectonics Lab 2 GEOL 1404...

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Plate Tectonics Lab 2 GEOL 1404 Historical Geology ----------------------------------------------------------------------------------------------------------- - Recall what you have learned about Earth’s internal structure. Some terms you should be familiar with include: core, mantle, crust, asthenosphere, lithosphere. Earth’s lithosphere is broken up into rigid plates that slide slowly over the plastically behaving asthenosphere. Geologists can confidently describe the motion of the plates with plate tectonics theory. This theory provides geologists with a powerful tool for explaining phenomena such as volcanism, earthquakes, mountain building, the distribution of the world’s biota and some mineral resources. Also it is key to anticipating the rock cycle and reconstructing Earth in earlier times. Types of Plate Boundaries 1.1 Geologists distinguish between three different types of plate boundaries: divergent, convergent, and transform. Plate boundaries have different types of stress according to the movement of the plates meeting at them. A boundary has tensional stress on it if the plates are pulling away from each other, thus making the boundary divergent . Plates coming together leads to compressional stress , making the plate boundary convergent . Shear stress results from two plates sliding past one another, which takes place at transform faults . Consider the pictures on the next page.
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This note was uploaded on 03/27/2012 for the course GEOL 2413 taught by Professor Moody during the Spring '10 term at Texas A&M University, Corpus Christi.

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Lab 2. Plate Tectonics - Plate Tectonics Lab 2 GEOL 1404...

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