Ikiztepe Horizon: Black Sea Chalcolithic

Perched on the southern rim of the Black Sea, the tell of İkiztepe in Samsun Province preserves the layered pulse of Chalcolithic life along Anatolia’s northern coast. Archaeological excavations at İkiztepe reveal a horizon archaeologists call the Ikiztepe Culture — a regional expression of settlement, craft, and burial practice that flourished roughly between 3500 and 3100 BCE. Material culture from the mound and associated satellite sites indicates persistent coastal occupation, trade connections into the interior, and a local pottery and funerary vocabulary that distinguishes this community from neighboring groups.

Archaeological data indicates continuity with earlier Anatolian farming traditions: domesticated crops and livestock, permanent settlement features, and long-lived ceramic styles that trace back to Neolithic developments. Limited evidence suggests maritime and riverine exchange along the Kızılırmak and Black Sea littoral, which would have shaped social networks and resource flows. The Ikiztepe horizon emerges as a regional node where long-standing Anatolian farmer ancestries and coastal trade intersect, setting the stage for demographic and cultural transformations in later millennia. Because the genetic sample size is very small, these origins are best framed as a tentative portrait rather than a conclusive demographic model.

Ancient DNA from İkiztepe is sparse but evocative. Three genome-wide samples dated to 3500–3100 BCE provide the first genetic window into this coastal Anatolian community. Two of the three male individuals carry Y-chromosome haplogroup G, a lineage commonly associated with early Neolithic farmers in Anatolia and the Caucasus. This prevalence is consistent with archaeological signals of continuity from earlier farming populations.

Mitochondrial haplogroups are currently undetermined in the public summary for these three samples, and genome-wide ancestry proportions are provisional because of the very small sample count. With only three genomes, statistical power is low; any population-level inference must be framed as preliminary. Nevertheless, the observed Y-G presence aligns with broader patterns where Anatolian farmer-related ancestry persisted in northern Anatolia during the Chalcolithic. There is no clear, robust signal of substantial Steppe-derived ancestry in this tiny dataset, but absence of evidence is not evidence of absence. Expanded sampling and higher-coverage genomes are required to test for admixture events, sex-biased migrations, or continuity versus replacement scenarios.

In short: current genetic data hint at farmer-derived continuity at İkiztepe, but the dataset is too small (<10 samples) to draw firm demographic conclusions.