Figure F1. Photograph of basalt breccia Section 187-1157A-3R-1 (Piece 6), which contains clasts of both aphyric and plagioclase-olivine phyric basalt. Chilled margins are evident on both clasts (i.e., the darker glassy area of the phyric basalt and the spherulitic chilled margin of the aphyric basalt emphasized in the lighter alteration halo).