Figure F16. Photomicrographs showing plagioclase phenocrysts. A. Plagioclase megacryst with inclusion of olivine (Sample 197-1205A-15R-2, 138-140 cm) (cross-polarized light; field of view = 5 mm; photomicrograph 1205A-211). B. Rounded plagioclase phenocry

Figure F16. Photomicrographs showing plagioclase phenocrysts. O. Sheared, relict olivine phenocryst in Subunit 29b (Sample 197-1205A-44R-2, 110-112 cm) (cross-polarized light; field of view = 1.25 mm; photomicrograph 1205A-262).