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