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Graphics Interchange Format  |  1998-11-13  |  29.0 KB  |  739x631  |  8-bit (52 colors)
   ocr: VOLCANIC ROCK CLASSIFICATION Phonolite 121 12 Tephri- Trachyte ALKALINE phonolite/ 9- L N Foidite Phono- 61 9 tephrite Trachy- andesite Trachy- a 2 SUBALKALINE dacite 31 Basaltic Tephrite- trachy- basanite landesite, 35 45 55 65 75 85 - / Abasalt Haay SiO2 (weight %) - - - Rhyolite A-7 Dacite Andesite 3 Basalt Basaltic andesite I Picro-Shergotty I basalt Zagami - - - - EETA79001B - A-3 I - I EETA79001A - 35 45 55 65 75 85 SiO2 (weight - %)