Figure F17. Close-up photograph of pervasively bleached vesicular volcanic rock with a zoned alteration pattern toward a darker gray, less strongly bleached kernel (interval 193-1188A-9R-1, 16-29 cm).

Figure F17. Close-up photograph of pervasively bleached vesicular volcanic rock with a zoned alteration pattern toward a darker gray, less strongly bleached kernel (interval 193-1188A-9R-1, 16-29 cm).