Fig. 2. Scanning electron micrographs of the fine clay fraction from the Webster soil; (A) low magnification scanning electron microscopy (SEM) illustrating numerous large (10–50 µm) and only a few small (0.5–5 µm) particles, (B) medium magnification SEM stereo pair of typical large smectite particles, and (C) high magnification SEM stereo pair of thin crumpled and thicker more rigid platy particles.