Figure F46. Particularly intense and pervasive replacement of groundmass by celadonite in a dusky green halo in Sample 192-1186A-31R-1 (Piece 3B, 44-48 cm). Note the vesicle filled with celadonite (upper left) (field of view = 2.8 mm; plane-polarized light; photomicrograph ID# 1186A_231).