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Figure F9. Thin section photomicrographs of veins in moderately olivine-augite-phyric microgabbro (Sample 330-U1375B-1R-1, 57–59 cm; Thin Section 228). Each pair is shown under plane-polarized light (left) and with crossed polars (right). A, B. Veins showing initial filling with green clay, followed by Fe oxyhydroxides and goethite. C, D. Vein showing initial filling by goethite, sometimes with a botryoidal habit, and then with carbonates. E, F. Vein filled with goethite and Fe oxyhydroxides.

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