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Unformatted text preview: Dark Very Dark Coarse Fine Porphyritic Glassy Vesicular Pyroclastic x x x x x Light colored feldspar floating in sea of black fine textured matrix Porphyritic basalt 1. x x x Light, dark gray, feldspars, black gerromageisan minerals Diorite 2. x x black volcanic crystalline rock Basalt 3. x x pink feldspars, black gerrogmagnesian minerals, transparent quartz Granite 4. x x red, black ,dense glass,sharp edges conchoidal fracture Obsidian 5. x x White grayish, glassy, light weight. Pumice...
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This note was uploaded on 10/17/2010 for the course GLG 101 GLG/101 GE taught by Professor Jebainbarasu during the Spring '10 term at University of Phoenix.
- Spring '10