Figure F15. Photomicrographs of microstructures in olivine gabbros (cross-polarized light). A. Olivine gabbro mylonite indicating foliation defined by layers of plagioclase and clinopyroxene/olivine (Sample 336-U1382A-9R-1 [Piece 5], Thin Section 15). B. Plagioclase porphyroclast and matrix (Section 336-U1382A-8R-4 [Piece 3], Thin Section 19). C. Secondary prehnite and laumontite in plagioclase porphyroclast (Section 336-U1382A-8R-1 [Piece 4], Thin Section 14).
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