Figure F46. Photomicrographs of alteration in the altered palagonitized crystal vitric tuff (Sample 200-1223A-5X-CC, 16-19 cm). A. Glass core replaced by clays in a shard with a palagonitized rim (plane-polarized light). B. Palagonitized shard with its rim replaced by clays (plane-polarized light). C. Zeolites in a matrix (plane-polarized light). D. Matrix zeolites (crossed polars). E. Enlarged portion of C, showing zeolite intergrowths. F. Zeolites in matrix (plane-polarized light).

Figure F46. Photomicrographs of alteration in the altered palagonitized crystal vitric tuff (Sample 200-1223A-5X-CC, 16-19 cm). A. Glass core replaced by clays in a shard with a palagonitized rim (plane-polarized light). B. Palagonitized shard with its rim replaced by clays (plane-polarized light). C. Zeolites in a matrix (plane-polarized light). D. Matrix zeolites (crossed polars). E. Enlarged portion of C, showing zeolite intergrowths. F. Zeolites in matrix (plane-polarized light).\