Cumulative number-size distributions for characteristics of section 1.1. (a) The distribution of both erosion and accretion cell lengths. This distribution is well described by an upper-truncated power law (UTPL) (Eq. 3) with truncation size, rT, equal to 7 km and scaling exponent, α, equal to 0.65. (b) The distribution of erosion values. This distribution is consistent with an upper-truncated power law with upper truncation size, rT, equal to 25 m. (c) The distribution of accretion values. This distribution is consistent with an upper-truncated power law with upper truncation size, rT, equal to 12 m.