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Optical Mineralogy

Mike // Undergrad Geology major at SUNY Oswego // Focus in Petrology/Mineralogy

Rhyolite // Left XPL, Right PPL Glassy Matrix Biotite Plagioclase Feldspar (oligoclase and albite) Quartz with undulose extinction Spherulites with cristobalite and alkali feldspar

#geology #minerals #mineralogy #optical mineralogy #quartz #rhyolite #feldspar #microscope #geologist #mica #biotite mica #biotite #spherulites #undulose extinction

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