Figure F64. A. Steeply dipping boundary between medium-grained troctolite (Interval 58; 0–50 cm) on the left and coarse-grained olivine gabbro (Unit 59; 50–56 cm) on the right. The olivine-plagioclase magmatic foliation is clearly parallel to the boundary (interval 345-U1415J-10R-1A, 47–55 cm [Piece 6B]; wet image). Red box (tick mark shows upward direction) indicates location and orientation of image in C. B. Gradational, vertical boundary defined by modal variation in olivine and plagioclase within troctolite (Interval 73; interval 345-U1415J-18R-1A, 129–142 cm [Piece 17]; dry image). The vertical olivine-plagioclase magmatic foliation parallels the boundary. C. Steeply dipping boundary between medium-grained troctolite on the left and coarse-grained olivine gabbro on the right (under crossed polars). Magmatic foliation and orange birefringent clinopyroxene oikocryst extend across the boundary. Red boxes indicate the location and orientation of images in Figures F11A and F11D. Red arrow indicates foliation orientation.
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