exp351_063

Volcanic “looking” glass: Volcanic glass is the uncrystallized product of rapidly cooling magma. Frank Tepley III (Igneous Petrologist, Oregon State University, USA) uses a microscope to look at thin sections in order to study volcanic glass. The glass provides information about its mineral composition and possibly about the volcano where it came from. (Credit: Bill Crawford, IODP/TAMU) [Photo ID: exp351_063]


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