The Devil's Trails: Middle Pleistocene Human Footprints Preserved in a Volcanoclastic Deposit of Southern Italy

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Abstract
Three fossilized trackways of human footprints were discovered in a pyroclastic flow dated to 385–325 ka, along the western margin of the Roccamonfina volcanic complex in Southern Italy. The pyroclastic flow is zeolite-rich and was probably emplaced at a relatively low temperature, forming a nonwelded pyroclastic deposit. The well-preserved footprints show the interesting strategies used by ancient humans in descending steep slopes. The footprints, short and very broad, are entaxonic, plantigrade, with an average length of 24cm and an average width of 10 cm. The three trackways are narrow with an oblique pace of about 60 cm and a stride of about 120 cm. If dating constraints are correct, the Roccamonfina human fossil footprints are the oldest known in Europe and among the oldest in the world. Moreover, they are preserved on a steep slope lying in a subaerial setting and are associated with handprints. For their potential in preserving evidence of behavior, these tracks provide unique insight into the activities of some of the earliest known Europeans.

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