Fig. 5

R2 values of 1st to 8th order polynomial trendlines fitted to mean vesicularity and grain shape (sphericity, elongation, compactness, and Krumbein roundness) observations for individually crushed pyroclasts
R2 values of 1st to 8th order polynomial trendlines fitted to mean vesicularity and grain shape (sphericity, elongation, compactness, and Krumbein roundness) observations for individually crushed pyroclasts