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. G. Plagioclase-olivine glomerocrysts (Sample 197-1205A-29R-2, 55-58 cm) (cross-polarized light; field of view = 5 mm; photomicrograph 1205A-235). H. Highly embayed olivine phenocryst from Unit 21 (Sample 197-1205A-37R-5, 28-29 cm) (cross-polarized light; field of view = 5 mm; photomicrograph 1205A-257).