Figure F160. Subtype of hyaloclastite consisting of basalt clasts and altered glassy clasts and glassy shards cemented by quartz, carbonate, and sulfide (mineralized volcanic breccia). A. Thin Section 80 (interval 309-1256D-122R-1 [Piece 19, 140–142 cm]). B. Spherulitic texture in cryptocrystalline basalt clasts of hyaloclastite (Thin Section 78; interval 309-1256D-122R-1 [Piece 16, 119–124]) (field of view = 5 mm; plane-polarized light, blue filter). Light spots are sulfides.
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