Figure F5. Olivine (Ol)-phyric basalt. A–C. Thin Section 91; Sample 345-U1415N-2R-1, 5–7 cm (Piece 1). (A, B) Brown Cr-spinel (Cr-spl) with black aureole of Fe3+-rich spinel in a matrix of olivine-phyric basalt. (C) Representative texture of the matrix of olivine-phyric basalt. Cpx = clinopyroxene, OX = oxide. D. Oscillatory zoned plagioclase (Pl) phenocrysts in olivine-phyric basalt (Thin Section 89; Sample 345-U1415N-1R-1, 52–54 cm [Piece 10]). The boundary between the core and rim of plagioclase is resorbed. Note that oscillatory zoning is cut by the boundary. A, C, and D are under crossed polars; B is in reflected light.
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