Crossed polars image of reversely zoned clinopyroxene in high-Mg andesite from Whaleback volcano, near Mt. Shasta, CA; image diameter ca. 2 mm (M. Streck). Originally uploaded in Cutting Edge:Petrology.
Image 13653 is a 3110 by 4219 pixel JPEG Uploaded:
Provenance Dave Mogk, Montana State University-Bozeman
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