Coasts & Cove: Mesolithic France

From the rocky headlands of Hoedic and Téviec in Brittany to riverine graves near Achères and Maisons-Alfort in the Paris Basin, the people we group as France_Mesolithic emerge from the end of the last Ice Age into a warming, reshaping world. Radiocarbon dates for the assemblage span roughly 9078 BCE to 5000 BCE, a long arc in which coastal resources and inland woodlands both sustained human communities. Archaeological layers at Téviec and Hoedic preserve shell middens, bone tools, and burial contexts that speak to repeated seasonal presence and maritime expertise. In eastern localities such as Mont Saint Pierre (Grand Est, Marne) and the site at Champigny, material traces emphasize riverine fishing and woodland hunting.

Archaeobotanical and faunal remains indicate a mosaic environment: increasing forest cover inland alongside rich estuarine zones on the Atlantic coast. These landscapes shaped mobility patterns, exchange networks, and funerary choices. Limited skeletal sampling (11 individuals) constrains our ability to generalize across all Mesolithic France; nevertheless, the combined archaeological and genetic record sketches communities adapted to diverse micro-environments, negotiating both continuity with Upper Paleolithic traditions and innovations that anticipate Neolithic transformations.

The genetic snapshot from 11 individuals attributed to France_Mesolithic offers a bridge between osteology and ancestry. Maternal lineages are dominated by haplogroup U (five individuals), with U5b represented in three—patterns consistent with broader Western European hunter-gatherer (WHG) signatures documented elsewhere. These mtDNA results align with archaeological interpretations of long-term regional continuity: maternal lineages commonly observed among Mesolithic Europeans recur in the French record.

Y-chromosome results are less straightforward. Several samples are labeled as haplogroups L (4) and M (1), assignments that are unexpected for later European chronologies where haplogroups such as I and R are more common. This discrepancy may reflect several possibilities: true presence of rare or now-extinct paternal lineages in Mesolithic France; differing haplogroup nomenclature or low-resolution calls in some ancient DNA analyses; or contamination and analytical uncertainty. Given the modest sample count and potential for reclassification as reference databases grow, these Y-DNA findings should be treated cautiously.

Genome-wide affinities (where available) point toward predominant WHG ancestry with local variation. Archaeogenetic data therefore reinforce an image of Mesolithic communities rooted in Western hunter-gatherer genetic landscapes, while also indicating unexpected paternal diversity that invites further study.