Figure F63. Close-up photograph of pieces of hyaloclastite composed of angular to rounded glass fragments several centimeters to >10 cm and smaller (<1 cm) curved shards and angular fragments of glass with a matrix of altered glass and phyllosilicate (interval 206-1256D-21R-2, 20-50 cm).

Figure F63. Close-up photograph of pieces of hyaloclastite composed of angular to rounded glass fragments several centimeters to >10 cm and smaller (<1 cm) curved shards and angular fragments of glass with a matrix of altered glass and phyllosilicate (interval 206-1256D-21R-2, 20-50 cm).