Abstract

Various facies of sedimentary rocks have characteristic assemblages of trace elements. The characteristic assemblages may be useful, not only in assisting in the correlation of some specific geological horizons, but also in determining the trace element content of the soils built from these horizons. No longer can it be considered prudent to think of adding any limestone merely to improve the pH, the structure, and the Ca content of a particular soil: the trace element content of a limestone involved in making soil may be a vital factor in determining the quality of that soil, whether that soil be used for agriculture or for forestry. In some instances human health may be involved.

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