Layer | Thickness (cm) | Number of pebbles | Long axis (cm) | Short axis (cm) |
Sandy layer | 70 | 24 | 6.5 4.5 4.4 2.4 3.0 3.0 3.2 2.7 2.0 2.4 1.8 2.0 2.1 1.2 1.0 0.9 1.2 1.7 1.0 0.7 0.5 0.6 0.3 0.4 | 3.6 2.5 1.7 2.1 0.6 1.5 2.0 1.3 1.3 1.6 1.0 1.1 1.3 0.6 0.3 0.1 0.5 0.8 0.4 0.3 0.3 0.2 0.2 0.2 |