Geoscience Reference
In-Depth Information
Figure 10.10 SEM images showing (a) spherical particles, (b) enlarged image of pores, (c)
ovoid-shaped carbon, and (d) spherules with scaly material.
Source: Photographs courtesy of B. Basavalingu.
Figure 10.11 (a and b) SEM images of carbon particles showing well-developed octahedral
facets adhered to the inner walls of the broken spherical particles.
Source: Photographs courtesy of B. Basavalingu.
minute crystallites which are adhered to the inner walls' spheres, and these crystals
show well-developed octahedral facets (
Figure 10.11a and b
). The growth of these
crystallites resembles the zeolite crystals grown in vugs and cavities of volcanic
