Ch 3 Homework

Rock b the magma formed in

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Unformatted text preview: series of crystallization to form different types of rock composition. For example, when magma cools, depending on the temperature, the rock is composed of certain minerals. The higher temperature, the more time it will take to cool, resulting in a granite rock. Granite rocks are composed of potassium feldspar, muscovite mica and quartz. However, if a rock cools more rapidly, these rocks will not contain the same minerals. For example, peridotite cools quickly and is composed mainly of olivine and some pryoxene because of the different reaction process of a rock cooling more quickly. 9. A. Laccolith B. Dike C. Batholith D. Sill 10. The student is wrong about the layer of basalt being a sill because of the presence of vesicles. The vesicles on the top portion of the basalt layer is evidence that they are extrusive rocks. This proves that the layer of basalt was most likely formed from magma flowing upward. At the surface, it cooled quickly enough to preserve openings from gas bubbles. The shale is sedimentary rock, making the layer on the top of the basalt form from the weathering of rocks over many years....
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This note was uploaded on 10/02/2013 for the course ENSC 210 taught by Professor Taylan during the Spring '13 term at Marist.

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