Place each of the igneous rocks supplied by your instructor on a numbered piece of paper. Then complete the igneous rock chart in Figure 2.12 and identify each specimen. To identify an igneous rock, follow these steps.
Step 1: Identify the texture of the rock.
Step 2: Determine the minerai composition of the rock by
a. Identifying the abundance of major minerals
or
b Estimating the mineral composition USing the color index
Step 3: Use the Igneous rock identification key In Figure 2.10 to identify the rock.
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Chapter 2 Solutions
APPS & INV IN EARTH SCIENCE, LAB MANUAL
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