Figure F11. Unit 13 consists of completely bleached and sparsely vesicular volcanic rock that shows jigsaw breccia texture caused by the fracturing and silicification in the vein halos (interval 193-1188A-14R-1, 42-50 cm). A. Close-up photograph of hand specimen. B. Line drawing sketch of hand specimen highlighting fractures and alteration halos.

Figure F11. Unit 13 consists of completely bleached and sparsely vesicular volcanic rock that shows jigsaw breccia texture caused by the fracturing and silicification in the vein halos (interval 193-1188A-14R-1, 42-50 cm). A. Close-up photograph of hand specimen. B. Line drawing sketch of hand specimen highlighting fractures and alteration halos.