Figure F17. Main macroscopic and microscopic characteristics of Unit 7. A. Interval 203-1243B-17R-1, 0-21 cm. B. Sample 203-12437B-17R-1, 17-19 cm (PPL; field of view = 2.75 mm; photomicrograph 1243B-45). C. Sample 203-1243B-15R-1, 84-87 cm (PPL; field of view = 2.75 mm; photomicrograph 1243B-46).