Coastal Iron: Croatia_EIA

The Croatia_EIA assemblage spans roughly 1051–200 BCE, a time when the karst and littoral zones of present-day Croatia hosted communities negotiating new technologies and wider networks. Archaeological data indicates settlement continuity from Late Bronze Age traditions alongside visible Iron Age innovations: iron tools, modified pottery forms, and grave rites that reflect local choices rather than wholesale replacement. Sites in this dataset — Jazinka Cave, Smiljan, Skradnik-Sultanov grob, Mala Metaljka, Osor-St. Peter, Sv. Križ Brdovečki, and Sv Petar Ludbreski — each preserve snapshots of regional lifeways across several centuries.

Material culture suggests selective adoption of Hallstatt-associated forms in some inland contexts and Mediterranean imports along the coast, consistent with archaeological models of increasing interaction rather than abrupt migration. Limited evidence suggests that communities maintained long-term ties to upland pastoralism and coastal exchange. The radiocarbon-calibrated range of these samples places them squarely within the Early Iron Age horizon of the central and western Balkans, a period characterized by heterogenous cultural identities and fluid contact zones. While the archaeological record provides a vivid stage — rock-cut tombs, cave burials, and small cemeteries — the genetic data (see below) helps illuminate who was buried here and how maternal lineages were distributed across these landscapes.

Seventeen individuals in the Croatia_EIA dataset provide a modest but informative window into maternal ancestry during the Early Iron Age. The mtDNA record is dominated by lineages common in Europe and the Near Mediterranean: HV (3 samples), T (3), H3b (2), U (2), and T2b (1). These maternal haplogroups are broadly consistent with long-standing European Neolithic farmer and post‑Neolithic maternal diversity; for example, haplogroup H and HV are frequent across Europe, while T and U have varied histories associated with both Neolithic and later movements. Six of the 17 samples either carried less-resolved haplogroups or lacked confident mtDNA calls in the summary data, so the mtDNA counts should be seen as partial.

No clear common Y-DNA pattern is reported for this set, and archaeological records indicate that preservation and sampling biases often limit male-line conclusions. Because Y-chromosome data are undetermined or sparse, we cannot draw robust inferences about paternal ancestry, patrilocality, or male-driven migrations from this dataset alone. Autosomal ancestry (not summarized here) would be required to resolve contributions from Steppe-derived, Balkan Neolithic, and Mediterranean sources more precisely.

While 17 genomes are a useful start, the geographic clustering of samples and uneven preservation make broader population-level claims preliminary. Still, the maternal diversity observed aligns with a picture of the Early Iron Age Balkans as a place of mixed local continuity and connectivity, where long-established maternal lineages persisted alongside cultural exchanges across the Adriatic.