Figure F60. Thin-section photomicrograph of an apparently clastic interval within Unit 27. The image shows the contact between a fine-grained quartz-illite altered "clast" (top right) and the dark clay rich matrix of the rock (interval 193-1188F-1Z-2, 8-10 cm, in plane-polarized light; width of view = 2.75 mm. Photomicrograph ID# 1188F

Figure F60. Thin-section photomicrograph of an apparently clastic interval within Unit 27. The image shows the contact between a fine-grained quartz-illite altered "clast" (top right) and the dark clay rich matrix of the rock (interval 193-1188F-1Z-2, 8-10 cm, in plane-polarized light; width of view = 2.75 mm. Photomicrograph ID# 1188F_11; thin section 58).