Figure F34. Part of a fine-grained patch in the mostly aphanitic upper part of Unit 4 (see Fig. F31, ). The patch shows subophitic texture and is composed mostly of clinopyroxene and plagioclase, although altered olivine is also present (dark grains with euhedral outlines [center left]) (Sample 192-1186A-37R-1 [Piece 5B, 114-118 cm]) (field of view = 2.8 mm; crossed polars; photomicrograph ID# 1186A

Figure F34. Part of a fine-grained patch in the mostly aphanitic upper part of Unit 4 (see Fig. F31). The patch shows subophitic texture and is composed mostly of clinopyroxene and plagioclase, although altered olivine is also present (dark grains with euhedral outlines [center left]) (Sample 192-1186A-37R-1 [Piece 5B, 114-118 cm]) (field of view = 2.8 mm; crossed polars; photomicrograph ID# 1186A_220).