Fine-grained varved clay beds up to about 6 metres thick underlie a large area around Prince George. Small quantities of clay were taken from several locations in this general area. Mainly, clay was produced from a pit now located in Prince George.

In general the clay is light brown sandy, soft, and noncalcar- eous. It has a cone of 1.5 - 3.5, is red to brown burning and is suitable for common brick or tile.