Figure F230. Contact between quartz-bearing oxide diorite of Unit 1256D-82 (top and right of image) and finer grained gabbro of Unit 1256D-81 (lower left corner) (Thin Section 65; Sample 312-1256D-214R-1, 34–35 cm) (field of view = 2.8 mm; plane-polarized light).
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