Recently, I was talking about the practice géophasique to Château-Rouge. The consumption of clay is a practice out of the ordinary, she is one of those foods that aren’t really, and who does the become that under the force of rituals. I found a book in English that deals mainly with this type of eating practices, out of the ordinary. It is the work of MacClancy, Jeremy, Henry, Jeya, Macbeth, Helen, Consuming the inedible. Neglected Dimensions of Food Choice, Berghan Books, Oxford, 2007. Many articles (at least three or four) are devoted to the practice géophasique.