Figure F41. Quench textures and crystal morphologies of Unit 2 pillow rims from Hole 1224F. A. This full thin section scan, photographed in transmitted light, shows the progression downward from a glassy rim to completely coalesced dark-brown spherulites (Sample 200-1224F-4R-6, 11-13 cm; plane-polarized light). Near the rim, many of the dark-brown spherulites only mantle individual plagioclase crystals and stellate intergrowths. B. Another glassier pillow rim with abundant acicular plagioclase crystals and plagioclase-clinopyroxene intergrowth (Sample 200-1224F-11R-2, 13-16 cm; plane-polarized light). The crystals are mantled with thin dark spherulitic rims that coalesce toward the bottom of the photomicrograph. C. Euhedral olivine, partly altered at its rim, set in glass (Sample 200-1224F-11R-2, 13-16 cm; plane-polarized light). D. Euhedral and faintly zoned clinopyroxene microphenocryst set in glass (Sample 200-1224F-11R-2, 13-16 cm; plane-polarized light). E. A gabbro clot in fine-grained basalt (Sample 200-1224F-3R-1, 90-92 cm; plane-polarized light). Note the absence of titanomagnetite or other opaque minerals in the clot. F. Sample 200-1224F-3R-1, 90-92 cm; in cross-polarized light.

Figure F41. Quench textures and crystal morphologies of Unit 2 pillow rims from Hole 1224F. A. This full thin section scan, photographed in transmitted light, shows the progression downward from a glassy rim to completely coalesced dark-brown spherulites (Sample 200-1224F-4R-6, 11-13 cm; plane-polarized light). Near the rim, many of the dark-brown spherulites only mantle individual plagioclase crystals and stellate intergrowths. B. Another glassier pillow rim with abundant acicular plagioclase crystals and plagioclase-clinopyroxene intergrowth (Sample 200-1224F-11R-2, 13-16 cm; plane-polarized light). The crystals are mantled with thin dark spherulitic rims that coalesce toward the bottom of the photomicrograph. C. Euhedral olivine, partly altered at its rim, set in glass (Sample 200-1224F-11R-2, 13-16 cm; plane-polarized light). D. Euhedral and faintly zoned clinopyroxene microphenocryst set in glass (Sample 200-1224F-11R-2, 13-16 cm; plane-polarized light). E. A gabbro clot in fine-grained basalt (Sample 200-1224F-3R-1, 90-92 cm; plane-polarized light). Note the absence of titanomagnetite or other opaque minerals in the clot. F. Sample 200-1224F-3R-1, 90-92 cm; in cross-polarized light.