Figure F11. Close-up photograph and photomicrograph of aphyric basalt representative of Unit 7 (pillow lava). A, B. Interval 336-U1382A-12R-1, 81–86 cm (Piece 18): (A) sparsely vesicular aphyric basalt with cryptocrystalline to glassy groundmass with intersertal texture, (B) cryptocrystalline to glassy groundmass with intersertal texture that is sparsely vesicular (thin section = 25 mm wide; single polarization). C, D. Interval 336-U1382A-12R-1, 101–104 cm (Piece 21): (C) cryptocrystalline to glassy aphyric basalt with grayish-brown patchy alteration, (D) intersertal texture with euhedral olivine mostly replaced by brown clay, with tabular and needle plagioclase with intergrown anhedral clinopyroxene (thin section = 25 mm wide; cross polarization).
Previous | Close | Next | Top of page