Figure F18. Main macroscopic and microscopic characteristics of Unit 8. A. Interval 203-1243B-18R-1, 28-53 cm. B. Sample 203-12437B-18R-1, 23-26 cm (PPL; field of view = 2.75 mm; photomicrograph 1243B-47). C. Sample 203-1243B-18R-1, 23-26 cm (PPL; field of view = 2.75 mm; photomicrograph 1243B-49). D. Sample 203-1243B-18R-1, 23-26 cm (XPL; field of view = 2.75 mm; photomicrograph 1243B-48).