Industrial clays, other than potential sources of alumina of the Columbia Basin

During World War II, the Columbia Basin in Idaho, Oregon, Washington, and the western portion of Montana developed into an important industrial area because of the abundance of hydroelectric ,Power and industrial raw materials. The industries that were established led to a substantial increase in Population, and additional industrial and population expansion is indicated at the present time. This inventory of known industrial clay deposits in the Columbia Basin area is prepared as an aid in the development of the area.