Chesterton Soil Concretions: Ilmenite and Not Iron-Manganese Cementing Matrix

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Science  08 Jun 1979:
Vol. 204, Issue 4397, pp. 1077-1078
DOI: 10.1126/science.204.4397.1077


Dark reddish-brown spherules are common in soils of the Chesterton soil series of a high marine terrace in southern California. The spherules are concretionary in structure and are bound by ilmenite rather than by an iron-manganese complex. The spherules have been mislabeled both with respect to structure and mineralogy.