Biological Impact of Exposure to Extremely Fine-Grained Volcanic Ash

Figure 1

Representative SEM image of Pichincha’s volcanic ash: (a) at 10000x magnifications; (b) at 5000 magnifications. The images illustrate angular- and round-shaped particles. (c) Granulometry of fine-grained volcanic ash of the 5th of October 1999 eruption of the PVC, using the MIRA3 SEM software based on 1004 particles.

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(b)

(c)