Clay particles are about 1,000 times smaller than sand particles (A). Clays have many forms. For example, kaolinite has book-like leaves (B), halloysite is made of balls (C), and (D) shows grains of quartz bound by lattices of iron oxide in the iron pan of a podzol. The shape of clay particles can only be seen by using a powerful scanning electron microscope.
Using this item
Reference: Les Molloy, Soils in the New Zealand landscape: the living mantle. Lincoln: New Zealand Society of Soil Science, 1988, plates 1.3, 1.4
© New Zealand Society of Soil Science
This item has been provided for private study purposes (such as school projects, family and local history research) and any published reproduction (print or electronic) may infringe copyright law. It is the responsibility of the user of any material to obtain clearance from the copyright holder.