Fig. 6
From: Physical characteristics of scoriae and ash from 2014–2015 eruption of Aso Volcano, Japan
Pictures of scoriae fractured by shear deformation. Pairs a, b, c, d, and e, f show photographs of Samples 1, 3, and 5 in Table 1 before and after shear deformation, respectively; a shows the scoria before Run 1, and b is after Run 3. b Shows shrinkage. d Shows fracturing into several blocks with various sizes. f Shows partial fracturing. High-porosity parts denoted by the yellow circles fracture and generate small particles, but other parts shrink