Figure F65. Close-up photograph of volcaniclastic rock composed of angular fragments of cryptocrystalline basalt embedded in a matrix of altered glass and phyllosilicate (Subunit 1256D-4a) (interval 206-1256D-20R-1, 32-50 cm).

Figure F65. Close-up photograph of volcaniclastic rock composed of angular fragments of cryptocrystalline basalt embedded in a matrix of altered glass and phyllosilicate (Subunit 1256D-4a) (interval 206-1256D-20R-1, 32-50 cm).