Figure 2
From: Reliability of Total Grain-Size Distribution of Tephra Deposits
Results of lognormal fitting of the TGSDs. (a) Pearson correlation coefficient r2 of the lognormal fitting vs. median grain-size of the distribution (μ); (b) median of the empirical distribution (Mdϕ) vs. median grain-size of the distribution (μ); (c) sorting (σϕ) of the empirical distribution vs. standard deviation of the lognormal distribution (σ); (d) μ vs. σ; (e) μ vs. plume height of the associated eruptions. Red circles: size distributions of co-PDC deposits. Black circles: all other size distributions.
