Figure F23. Mineralized volcanic breccia (Subunit 1256D-42a) and volcanic breccia interbedded with sheet flow (Subunit 1256D-42b). The breccia consists of angular fragments of glassy to cryptocrystalline basalt embedded in altered glass, sulfides, and late carbonate. Pieces indicated by arrows in Subunit 1256D-42b are brecciated. A. Interval 309-1256D-122R-1 (Piece 12, 5066 cm). B. Interval 309-1256D-122R-1 (Piece 13, 6780 cm). C. Interval 309-1256D-123R-1 (Piece 4, 1520 cm). D. Interval 309-1256D-122R-2 (Pieces 2 and 3, 1530 cm).
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