Rock_Introduction_1 - Common Rocks |o an Earth scientist,...

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Common Rocks |o an Earth scientist, rocks represent much " more than usable substances. They are the ma- terials of the Earth; understanding their origin and how they change allows us to begin to un- derstand Earth and its processes. It is often said that "the history of Earth is written in the rocks"—we just have to be smart enough to read the "words." In this exercise, you will investigate some of the common rocks that are found on and near Earth's sur- face. The criteria used to classify a rock as being of ei- ther igneous, sedimentary, or metamorphic origin are examined, as well as the procedure for identifying rocks within each of these three families. Objectives After you have completed this lab exercise, you should be able to 1. Examine a rock and determine if it is an igneous, sedimentary, or metamorphic rock. 2. List and define the terms used to describe the tex- tures of igneous, sedimentary, and metamorphic rocks. 3. Name the dominant mineral(s) found in the most
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This note was uploaded on 04/03/2011 for the course PHYS 114 taught by Professor Comptonw during the Summer '10 term at Purdue.

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