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The Modena alluvial plain is located on the northern side of the northern Apennines fold-and-thrust belt, where streams draining the chain flow toward the northeast into the Po River. The alluvial plain is characterized by a spectacular abundance of archaeological sites of various ages and can be considered a natural laboratory for the reconstruction of the recent sedimentary evolution of the Po Plain. Detailed modal analyses of modern sands of the Modena Plain streams indicate that the provenance signal can be distinguished on the basis of key components, such as quartz, feldspar, carbonate, and lithic fragments. The compositional fields of the streams depend on the extent of the watershed, the recycling of older fluvial sediments, and the sediment input from tributary streams.

The modal analyses demonstrate that sand composition of the major rivers (Panaro and Secchia) has not changed during the Holocene …