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Geology Lab Worksheet

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Geology
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Park University
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Running head: GEOLOGY LAB WORKSHEET GEOLOGY LAB WORKSHEET Name: Institution: Date: 1 GEOLOGY LAB WORKSHEET GEOLOGY LAB WORKSHEET Igneous rock inquiry A. Analysis of rock samples Sample 1 Name of the rock: Diorite The color of the rock: Grey to dark-grey Rock composition: Feldspar, Plagioclase, Biotite, Pyroxene, Hornblende Rock texture: It is speckled, Phaneritic and coarse-grained Mineral composition: Intermediate Sample 2 Name of the rock: Obsidian The color of the rock: Tan Rock composition: Felsic Rock texture: Glassy or vitreous Mineral composition: Mafic Sample 3 Name of the rock: Andesite The color of the rock: Light-grey Rock composition: Amphibole, Biotite, Pyroxene Rock texture: Porphyritic Mineral composition: Intermediate 2 GEOLOGY LAB WORKSHEET 3 Sample 4 Name of the rock: Granite The color of the rock: Light-colored, pink, orange Rock composition: Quartz, Feldspar, Mica Rock texture: Phaneritic Mineral composition: Felsic Sample 5 Name of the rock: Pegmatitic granite Color of the rock: Brownish Rock composition: Quartz, Feldspar, Mica Rock texture: Felsic Mineral composition: Felsic Sample 6 Name of the rock: Scoria Color of the rock: Dark-brown Rock composition: Plagioclase, Olivine, and Pyroxene Rock texture: Vesicular Mineral composition: Mafic B. Classification of the rocks I would classify the rocks according to their mineral composition. Based on the identity of the rocks above, sample 4 and sample 5 would be in the felsic group, sample 2 ...
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