Figure F31. Photomicrographs showing a cluster of apatite crystals, many of which are in optical continuity associated with orthopyroxene, clinopyroxene, plagioclase, and oxide (Sample 209-1275B-12R-2, 57–60 cm) (field of view = 2.75 mm). A. plane-polarized light: blue + dark gray filters; image 1275B_053. B. Two optically continuous apatite grains are designated as Ap1 and Ap2. cross-polarized light: blue filter + gypsum plate; image 1275B

Figure F31. Photomicrographs showing a cluster of apatite crystals, many of which are in optical continuity associated with orthopyroxene, clinopyroxene, plagioclase, and oxide (Sample 209-1275B-12R-2, 57–60 cm) (field of view = 2.75 mm). A. plane-polarized light: blue + dark gray filters; image 1275B_053. B. Two optically continuous apatite grains are designated as Ap1 and Ap2. cross-polarized light: blue filter + gypsum plate; image 1275B_051.