Shell-Ringed Hearth Moves Ice Age Arrival in Italy Back by Thousands of Years

A hearth ringed with marine shells at Riparo Mochi, a rock shelter near the French-Italian border, has pushed back the arrival of Ice Age hunter-gatherers in Italy by 2,000 to 3,000 years. Radiocarbon dates on the shells fall between 30,000 and 30,800 years ago.

Fabio Santaniello of the University of Trento and his colleagues reopened the eastern deposit. They recovered more than 7,500 stone artifacts, along with the intact hearth, Noailles burins and other tools. The work is published in the Journal of Archaeological Science: Reports.

The date solves a puzzle. The Noaillian is a Middle Gravettian culture, and it is thought to have spread from northern Spain and France eastward into Italy. Riparo Mochi lies on the narrow coastal corridor that newcomers would have had to cross. Yet older dates placed the Noaillian in southern Italy 31,000 to 30,000 years ago, while Mochi, much closer to France, seemed to show it only around 28,000 years ago. The new dates bring the two regions into line.

The earlier digs ran from 1938 to 1959. They used broad artificial levels, and fine sediment was rarely sieved. The new team followed the natural boundaries of the soil and mapped the 3D position of every artifact. They water-sieved all the excavated earth through fine mesh. That recovered tiny bone fragments, bladelets and chipping debris that older methods would have missed.

The tools also tell a different story than expected. Burins were long assumed to engrave bone and antler with their pointed tips. Under high-powered microscopes, the tips showed no wear. The long side edges did, in a pattern that points to cutting skin and meat. Other finds show how the camp worked. Microgravettes were fitted onto shafts as hunting tips. Scrapers and wedges shaped wooden shafts and split bone, either for marrow or to make blanks for bone tools.

The authors argue that the Noaillian arrived as a complete package of behavior and quickly replaced local habits rather than blending with them. That suggests real migration into thinly settled coastal lands, not just the spread of ideas through trade. The arrival matches Greenland Stadial 5.1, about 30,500 years ago, when Europe turned cold and dry. The researchers suggest that this pushed people east along the Mediterranean toward milder refuges in Italy.

The case shows how a modern re-excavation can overturn both a long-accepted date and the assumed use of a familiar tool. Old finds are only as reliable as the methods that recovered and dated them.

Compiled from the reports below. Read the originals.