• "Geology" means the study of the earth, and in particular the study of the origin, history and topographic form of rocks, ores and minerals, either under the ground or upon the surface, and their alteration by surface agencies, such as wind, water, ice and other agencies, and the economics of their use. [Amended by 1989 c.954 §1; 1993 c.260 §1]

    Oregon Legislature 1
    See also board, department