Lecture 10 - Quote of Day Reputation is what other people...

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Unformatted text preview: Quote of Day Reputation is what other people know about you. Honor is what you know about yourself. (Lois Bujold) http://www.quotationspage.com/subjects/honor/ Chapter 4 Igneous Rocks and Volcanism subatomic particles (54) atoms / elements minerals / molecules rocks Earth solar system universe igure 4.1 Igneous Rocks and Volcanism Rock Cycle Figure 1.21 Some principles and terminology Igneous rocks form as molten rock cools and solidifies Two broad groups of igneous rocks are Extrusive (volcanic ) rocks formed from crystallizing molten rocks on the earths surface (lava ) Intrusive (plutonic ) rocks formed from magma crystallizing at depth Molten rock has three components: Liquid portion or melt Solids (crystallizing minerals, xenoliths) Volatiles (dissolved gases in the melt, including water vapor (H 2 O), carbon dioxide (CO 2 ), and sulfur dioxide (SO 2 )) Slow cooling of magma allows atoms to become organized and eventual crystallize to form minerals There is a predictable sequence of minerals that crystallize from a melt. Texture, which describes the size and arrangement of mineral grains, depends in part on how quickly the melt cools / crystallizes Fast rate => many small crystals Slow rate => fewer but larger crystals Very fast rate => glass Igneous textures igure 4.8igure 4....
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This note was uploaded on 04/18/2011 for the course EAS 101 taught by Professor Kirschner during the Spring '11 term at Saint Louis.

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Lecture 10 - Quote of Day Reputation is what other people...

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