Plate P12. A, B. Dolomite breccia showing areas of dolomicritic matrix in-fill and coarse cemented veins (Sample 201-1230A-31X-1, 0–19 cm; 229.6 mbsf). Anhedral dolomite of coarse sparitic areas with almost perfect hexagonal shape. C. Sample 201-1230A-30X-1, 0–5 cm; 226.3 mbsf. D. Sample 201-1230A-31X-1, 1–19 cm; 229.6 mbsf.