Figure F12. Photograph of interval 187-1155B-8R-3, 68-72.5 cm, showing a pillow margin with calcite veins running parallel to the glass margin and an associated wedge-shaped infill? of micritic calcite. Fresh glass is enclosed by palagonite. The boundary between the calcite vein/micritic limestone and altered glass is marked by a thin black layer of Mn oxide. Spotty Mn oxide is present within the calcite vein and the limestone.