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. E, F. Plagioclase phenocrysts from Subunit 14b (Sample 197-1205A-29R-2, 55-58 cm) (cross-polarized light; field of view = 5 mm): (E) zoned, fractured, and strained plagioclase phenocryst (photomicrograph 1205A-236); (F) highly embayed plagioclase phenocryst (photomicrograph 1205A-237).