Figure F47. Photomicrographs (both in plane-polarized light) of sanidine and altered mafic (probably clinopyroxene) phenocrysts, the latter now replaced by siderite, (A) from the top of Unit 5 in Sample 183-1139A-60R-2, 100-104 cm, and (B) from the middle of Unit 5 in Sample 183-1139A-61R-1, 74-76 cm.