Figure F48. Photomicrographs of garnet-biotite gneiss. A. Poikiloblastic garnet (gt) in Unit 6 (clast in conglomerate, Sample 183-1137A-35R-2, 46-47 cm) in plane-polarized light; field of view width = 1.4 mm. B. Porphyroblastic garnet (gt) and biotite (bi) from Unit 9 (clast in tuff, Sample 183-1137A-44R-4, 44-46 cm) in plane-polarized light; field of view width = 2.8 mm.