Figure F58. A–D. Thin section photomicrographs of flow alignment textures from an olivine-phyric lava flow from Unit XIII (Sample 330-U1374A-36R-4W, 76–78 cm; Thin Section 182). All photomicrographs are oriented with the black arrow pointing upward toward the top of the core. The flow texture (red arrow) is defined by a strong alignment of plagioclase laths, which are particularly apparent in (A) plane-polarized light and (B) with crossed polars. The reflected light images at (C) moderate and (D) high magnifications reveal two styles of titanomagnetite crystal growth: larger crystals that are euhedral–subhedral but randomly oriented and smaller crystals, often with aligned skeletal textures, particularly between plagioclase laths.
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