Term applied to the general chemical composition of the soils or rocks of a region, against which the presence of anomalously high (or low) values may be gauged. Used especially in geochemical prospecting (Hawkes and Webb, 1962, p. 22–26).
- Hawkes, H.E., Webb, J.S., 1962. Geochemistry in Mineral Exploration. New York: Harper & Row, 415 pp.Google Scholar