Rhyolite is a volcanic rock equivalent to intrusive granite. Photomicrograph, thin section, polarized light.

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Photo credit: © José María Barres Manuel / Alamy / Afripics
License: Royalty Free
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Keywords: extrusive, geology, igneous, light, microscope, petrographic, petrology, photomicrograph, polarized, polarizing, rhyolite, riolita, rock, section, thin, volcanic