Figure 6. Ordering of facies occurrence. (A) Illustration of facies distribution in a scan line measured from outcrops. Numbers 1, 2, 3, and 4 are assigned to facies H, M, L, and U, respectively. If two facies with successive numbers (e.g., H and M, M and L, and L and U) occur adjacent to each other, the difference between their assigned numbers is 1. (B) Frequency distribution of the difference between the numbers of two adjacent facies. N = number of observations.