Fig. 12

Relationships between shape parameters. A–B show sphericity plotted against Krumbein roundness. The other plots show elongation plotted against Krumbein roundness (C–D), sphericity (E–F), and compactness (G–H). Colors represent grain size (left) and vesicularity (right). Each crushed pyroclast is represented by multiple data: one for each grain size bin that constitutes a fraction > 1% of the entire crushed pyroclast. Each data point shows the mean shape parameter values for grains within that particular grain size bin. Grain sizes > 700 µm are left out to enhance visibility of data, and because their shape is not correlated to vesicularity (Figs. 10 and 11)