Figure F5. Aphyric nonvesicular medium-grained basalt from Unit 1 (massive flow) (interval 336-U1382A-3R-2, 99–103 cm [Piece 11]). Red boxes show location of thin section and photomicrographs. A. Photograph of basalt piece with typical patchy alteration. B. Photomicrograph of granular to intersertal texture (thin section = 25 mm wide; plane polarization). C. Same as B in cross-polarized light.
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