GLG103 LAB 02 - Igneous_Rock_Worksheet_Completed (2).doc

GLG103 LAB 02 - Igneous_Rock_Worksheet_Completed (2).doc -...

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LAB 2 – GLG 103 IGNEOUS ROCK WORKSHEET Name: Sharon Alvarez Complete the table by including the characteristics and the identity of each unknown rock.
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SPECIMEN NUMBER COARSE-GRAINED, FINE-GRAINED, PORPHYRITIC, GLASSY, OR FRAGMENTAL? TWO GRAIN SIZES? LIGHT, INTERMEDIATE, OR DARK COLOR? NAME ANY VISIBLE MINERALS: Quartz: gray, glassy w/irregular fracture Mica: silvery or black flakes Amphiboles/Pyroxenes: black, blocky to splintery looking Feldspar : black, or pink to white, semi- chalky, and blocky
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