Figure F58. A. Plagioclase-rich xenolith in Sample 192-1183A-54R-5 (Piece 4B, 64-66 cm), Unit 2B, showing interstitial glass-filled (devitrified) patches between plagioclase crystals. Other areas in the xenolith contain more irregular glass-filled areas (Fig. F59, ). B. Another example of interstitial patches from the same xenolith. (Field of view = 2.8 mm; plane-polarized light; [A] photomicrograph ID# 1183A_001 and [B] photomicrograph ID#1183A

Figure F58. A. Plagioclase-rich xenolith in Sample 192-1183A-54R-5 (Piece 4B, 64-66 cm), Unit 2B, showing interstitial glass-filled (devitrified) patches between plagioclase crystals. Other areas in the xenolith contain more irregular glass-filled areas (Fig. F59). B. Another example of interstitial patches from the same xenolith. (Field of view = 2.8 mm; plane-polarized light; [A] photomicrograph ID# 1183A_001 and [B] photomicrograph ID#1183A_002.)