Figure F69. Chalcopyrite-sphalerite bearing clast in volcaniclastic sandstone. Both images are from Unit 31, interval 193-1189B-17R-1, 98-100 cm. A. Overview showing the relationship of the clast to the surrounding sedimentary matrix (in cross-polarized light; width of view = 1.4 mm [Photomicrograph ID# 1189B_61; thin section 139]). B. Increased magnification reflected light view of opaque phases (chalcopyrite and sphalerite) from the previous image (width of view = 0.7 mm [Photomicrograph ID# 1189B

Figure F69. Chalcopyrite-sphalerite bearing clast in volcaniclastic sandstone. Both images are from Unit 31, interval 193-1189B-17R-1, 98-100 cm. A. Overview showing the relationship of the clast to the surrounding sedimentary matrix (in cross-polarized light; width of view = 1.4 mm [Photomicrograph ID# 1189B_61; thin section 139]). B. Increased magnification reflected light view of opaque phases (chalcopyrite and sphalerite) from the previous image (width of view = 0.7 mm [Photomicrograph ID# 1189B_62; thin section 139]).