A collection of resources that I have found helpful in my wild clay explorations.
Paper Resources:
Progress Reports on Clays and Shales of Montana, Montana Bureau of Mines and Geology:
Digital Resources:
Digitalfire.com Reference Library, by Tony Hansen
International Wild Clay Research Project at Montana State University
Research, by Nicolle Hamm
Ceramic Action, by Matt Fiske
Pioneer Pottery
by Michael Cardew
Wild Clay: Creating ceramics and glazes from natural and found resources
by Matt Levy, Hitomi Shibata, and Takuro Shibata,
Ceramic Science For The Potter
by W.G. Lawrence
Glazes from Natural Sources
by Brian Sutherland
Science for Potters
by Linda Bloomfield
Chinese Glazes : Their Origins, Chemistry, and Recreation
by Nigel Wood
Roadside Geology Series
by Donald W. Hyndman and David Alt