Figure F43. Variolitic plagioclase concentrated at the margin of a xenolith. The acicular plumose crystals extend slightly but distinctly into the host volcanic matrix (Sample 193-1189B-15R-2 [Piece 10, 61-64 cm] in plane-polarized light; width of view = 1.38 mm. Photomicrograph ID# 1189B

Figure F43. Variolitic plagioclase concentrated at the margin of a xenolith. The acicular plumose crystals extend slightly but distinctly into the host volcanic matrix (Sample 193-1189B-15R-2 [Piece 10, 61-64 cm] in plane-polarized light; width of view = 1.38 mm. Photomicrograph ID# 1189B_40; thin section 134).