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Figure F5. Typical appearance of troctolite in Unit III (Troctolite Series). Troctolite is, in general, equigranular with a granular texture showing a remarkable degree of homogeneity in both modal composition and grain size. Troctolite generally consists of olivine (30–54 vol%) and plagioclase (45–70 vol%), with trace amounts of clinopyroxene and oxide (Cr-spinel). A. Sample 345-U1415P-16R-1, 85–94 cm (Piece 9). B. Sample 345-U1415P-20R-2, 3–12 cm (Piece 1).

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