Figure F36. Thin section photomicrographs of basalt, Site U1374. Highly olivine-augite-plagioclase-phyric basalt from Unit III showing large olivine, titanaugite, and small plagioclase phenocrysts (A) under plane-polarized light and (B) with crossed polars (Sample 330-U1374A-3R-2, 108–110 cm; Thin Section 118). C. Aphyric basalt from Unit X showing glassy groundmass, unaltered groundmass olivine, and flow-aligned plagioclase laths (Sample 330-U1374A-19R-1, 50–53 cm; Thin Section 147) (plane-polarized light). D. Highly olivine-plagioclase-augite-phyric basalt from Unit XII. Large plagioclase phenocrysts are abundant in this unit and are often partly resorbed and filled with interconnecting inclusions of dark glass (Sample 330-U1374A-24R-1, 77–80 cm; Thin Section 158) (plane-polarized light).
Previous | Close | Next | Top of page