Lecture 4 Jan 28 2008 The rock cycle

Lecture 4 Jan 28 2008 The rock cycle - We understand NPR...

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We understand NPR stories!
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The Man in the Moon? http://www.stargazing.net/Dav id/moon/lunarpatterns.html http://www.planetfusion.co.uk/ ~pignut/see_man.html
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Rocks are made up of minerals. A rock is an aggregate of one or more minerals. A rock’s properties depend upon its mineralogy (identity and relative abundance) and its texture.
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granite biotite muscovite quartz albite orthoclase The vocabulary of mineralogy and petrology (rocks) give geologists a means of clearly describing what they observe.
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The rock cycle is a set of geologic processes relating the formation of the three rock types. [Processes in red. Rocks in black.] The rock cycle was proposed more than 200 years ago, long before the tectonic model of Earth’s processes.
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All igneous rocks form from the cooling and crystallization of molten rock called magma (inside Earth) to form intrusive rocks or lava (on the surface of Earth) to form extrusive rocks.
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Pressures are typically 0.001 to 8 kbar.
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This note was uploaded on 04/11/2008 for the course EVSC 280 taught by Professor Herman during the Spring '08 term at UVA.

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Lecture 4 Jan 28 2008 The rock cycle - We understand NPR...

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