Figure F27. Medium-grained basalt of Sample 185-801C-37R-5 (Piece 1A, 37-40 cm) in (A) plane-polarized light and (B) crossed polars. Pyroxenes and plagioclases are intergrown, which denotes common growth during relatively slow cooling within flow interior. Note the small amount of dark interstitial material on the top and bottom of the photograph. Magnification = 50×; field of view = 5 mm.