Soil Clays (PDF)

G. Jock Churchman is adjunct senior lecturer at the University of Adelaide (Australia) and adjunct

associate professor at the University of South Australia. Jock Churchman's clay interests began with

a PhD in chemistry on halloysite at the University of Otago in his native New Zealand, followed

by industrial ceramic research (1970-1971). He held a postdoctoral fellowship in soil science at the

University of Wisconsin-Madison (1971-1973) and was employed at the New Zealand Soil Bureau

(1973-89), then at CSIRO (1989-2003), the University of Adelaide (2003-2012) and the University

of South Australia (2013-2014). He has also held visiting fellowships in soil science for one year at

Reading University (UK) and for six months at the University of Western Australia. His research

has encompassed halloysite; acid dissolution of montmorillonite; dust transport; clay mineral genesis;

clay-organic complexes; the influence of clay mineralogy on soil physical properties; clays in

sodic soils; the characteriation of bentonites and their industrial and environmental applications;

and the philosophy of soil science.

He has published nearly 150 refereed papers and coedited four books, most recently The Soil

Underfoot: Infinite Possibilities for a Finite Resource (CRC Press, 2014) and Natural Mineral

Nanotubes (CRC Press, 2015). He is a former editor (now emeritus) of Applied Clay Science. He

has received awards from the New Zealand Society of Soil Science, Soil Science Australia, the

Association Internationale pour l'Étude des Argiles (AIPEA) and the Clay Minerals Society.

Bruce Velde is an emeritus researcher for the Centre Nationale de Recherche Scientifique at the

Ecole Normale Supérieure in Paris. He did his PhD at Montana State University (1962) under the

direction of John Hower, then he did a postdoctoral