Figure F10. Photomicrographs of zonation in plagioclase (Sample 197-1203A-35R-4 [Piece 1F, 47-49 cm]) (cross-polarized light). A. Field of view = 10 mm; photomicrograph 1203A-59. B. Field of view = 2.5 mm; photomicrograph 1203A-60.