İkiztepe: Late Chalcolithic Shores

İkiztepe sits on the southern rim of the Black Sea in what is today Samsun Province. Archaeological layers dated between c. 3959 and 3094 BCE reflect a Late Chalcolithic occupation phase characterized by coastal settlement, mortuary activity, and material connections across northern Anatolia. Excavations at İkiztepe have revealed cemeteries, domestic architecture, and craft debris that speak to a community oriented toward the sea and inland exchange networks.

The material culture—ceramics with regional motifs, shell and bone tools, and burial rites—suggests continuity with earlier Chalcolithic traditions in Anatolia while also revealing new local practices. Archaeological data indicates interaction with interior river valleys and coastal trading routes; limited evidence points to the circulation of raw materials and ideas rather than wholesale population replacement.

From a broader perspective, İkiztepe falls within a tapestry of Late Chalcolithic sites where social complexity increased without the full urbanization seen later. Radiocarbon dates anchor the site in the mid-to-late 4th millennium BCE, a period of subtle demographic shifts. While the archaeological record records local lifeways, ancient DNA from twelve individuals provides a complementary line of evidence to trace biological connections and mobility across Anatolia and the Near East.

Bullets:

• Coastal Late Chalcolithic occupation in İkiztepe, Samsun Province (3959–3094 BCE)
• Material links to wider northern Anatolian and Near Eastern networks
• Archaeology suggests local continuity with regional exchange

Twelve individuals from İkiztepe LateC were analyzed for uniparental markers and genome-wide ancestry. While this sample is modest, genetic results illuminate maternal and paternal lineages present in a Late Chalcolithic Anatolian community and provide cautious clues about regional affinities.

Y-chromosome diversity among the analyzed men includes haplogroups J (1), G (1), and a GHIJK-class assignment (1). Haplogroup J and G are both known from Neolithic and Chalcolithic Anatolia and the Near East, where they are often associated with early farmer and local male lineages. The GHIJK designation is broad and reflects limited resolution in a small number of samples; it should not be over-interpreted.

Mitochondrial DNA shows a stronger signal: J (3), I5 (1), U (1), K (1), and X (1). Maternal haplogroups such as J and K are commonly found across Anatolia and the Near East in Neolithic and later periods, consistent with archaeological expectations for regional continuity in maternal lines. The presence of U and X hints at deeper Paleolithic and Eurasian connections, but numbers are small.

Genome-wide ancestry (limited by sample size) appears consistent with predominantly Anatolian farmer-related ancestry with possible minor inputs from neighboring regions. Archaeogenetic comparisons suggest continuity with earlier Anatolian Neolithic populations, though localized admixture and mobility along the Black Sea coast are plausible. Overall, the genetic evidence is informative but preliminary: with n=12, patterns merit further sampling to confirm regional trends.

Bullets:

• Y: J, G, and a broad GHIJK signal—ties to Anatolian/Near Eastern male lineages
• mtDNA: predominance of J and presence of K, I5, U, X—consistent with regional maternal continuity