Figure F50. 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 (Sample 309-1256D-122R-1 [Piece 19, 140–142 cm]). B. Spherulitic texture in cryptocrystalline basalt clasts of the hyaloclastite (Sample 309-1256D-122R-1 [Piece 16, 119–124 cm] (plane-polarized light, blue filter; field of view = 5 mm). Light spots are sulfides.