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Unformatted text preview: 70% quartz 30% k-spar speckled black and white, felsic intrusive, intermediate magma 90% olivine, 10%plagioclase feldspar <10% quartz, not much else light green, brown spots, felsic intrusive, intermediate magma black, white specks, bubbly looking, mafic tiny amounts of quartz at 15% aphenitic 0%, though there may be crytals not viewable to naked eye black, shiny, ultra mafic extrusive, lava that's been cooled extremely fast <10% feldspar crystals extrusive, forms from volcanic ash light grey, intermediate 35% quartz, 45% feldpsar, 15% biotite pinkish, speckled black, felsic pegmatitic, a little bit porphyritic 35% quartz, 45% felspar, 20% biotite speckled brown and black, some red tints, felsic tiny bits of <10% quartz pinkish tint, brownish, felsic 75%+ plagioclase feldspar extrusive, intermediate magma...
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This note was uploaded on 04/10/2012 for the course GEO 3112 taught by Professor Erickelly during the Fall '11 term at University of Texas.
- Fall '11