Numbers | Nomenclature | Aspect | Dimensions (in m) | Colour | Iron % |
B1 | g34-34’ | Volume, with rounded extremities | 9 × 3.5 | brown | 24.4 |
B2 | j56 | plaque | 4 × 5 | orange | <10%, but there is an important peak of oxygen |
B3 | k70 | Elongated plaque | 8.5 × 4 | red | 44.6 |
B4 | k80 | plaque | 6 × 4 | red pale | <10%, but there is an important peak of oxygen |
B5 | l8 (type) | plaque | 5.5 × 4 | red | 50.4 |
B6 | l68 | Volume, with rounded extremities | 13 × 6.5 | red | 38.7 |
B7 | p23 | plaque | 4 × 3.5 | red | 32.7 |