Figure F24. Main alteration features in Units 1, 3, and 7. A. Sample 203-1243B-5R-2, 29-32 cm (PPL; field of view = 2.75 mm; photomicrograph 1243B-27). B. Sample 203-1243B-5R-2, 29-32 cm (XPL; field of view = 2.75 mm; photomicrograph 1243B-32). C. Sample 203-1243B-6R-2, 105-109 cm (PPL; field of view = 2.75 mm; photomicrograph 1243B-19).