Figure 4.

Mineralogy of Shovelers Sink clay size fraction. (A) TEM image showing flakes of smectite-dominated clay minerals (I/S), quartz (Qz), potassium feldspar (KF), plagioclase, and titania (TiO₂) grains. (B,C) HRTEM image and selected area diffraction pattern taken from the area indicated by the large arrow in (A), showing the curled edge of a clay aggregate with lattice fringes corresponding to (001) smectite with ca. 10-Å layer spacing; the size of this spacing was likely reduced in the vacuum of the TEM. (D) EDAX results for an I/S aggregate. A small amount of potassium is detected, indicating that the smectite contains an illite component.