The existence of anomalous concentrations of copper and cobalt in the leaves and twigs of trees growing downslope, over, and at least 200 feet upslope from the ore suboutcrop supports the inference that geochemical anomalies in near-surface soils may involve the biochemical cycle. Metals taken up from deep soils or ground water at depths up to at least 60 feet enter the aerial parts of the plant, and then the topsoil.

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