Abstract
Nodules 0.1–0.7 mm in diameter seen in thin sections of the C horizon of a soil from the Peace River area of Alberta were analyzed. Energy-dispersive X-ray analysis (EDXRA) showed their composition (%) to be approximately MgO, 3; Al2O3, 22; SiO2, 52; K2O, 4; CaO, 2; Fe2O3, 10. X-ray analysis by Gandolfi camera showed strong glauconite lines and weak lines for quartz and kaolinite. The presence of these relatively large glauconite nodules in an otherwise fine-grained material is incompatible with its presumed lacustrine origin. Presumably, the glauconite nodules were inherited from the Smoky River shale, and the C horizon material may be residual.
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