A soil formed in place on a parent material gradational into the rock from which it is derived. In other words it has not been transported and therefore still has a genetic relationship with the geological material it rests upon. Where residual soils overlie ore deposits, vestigial traces of the ores may be detected by studying the mineralogy or chemistry of the soil, even where the latter is highly weathered. Hence the usefulness of residual soils in geochemical prospecting (Hawkes and Webb, 1962, Chapter 9).
- Hawkes, H.E., and Webb, J.S., 1962. Geochemistry in Mineral Exploration. New York: Harper and Row. 415 pp.Google Scholar