Caleta Huelen: Coastal Voices c.1100 BP

Along the wind-swept coves of coastal Chile, the people represented by samples from Caleta Huelen 12 lived during the late first and early second millennium CE — broadly dated between 750 and 1150 CE (≈1100 BP). Archaeological data from the wider coastal zone during this interval indicate persistent small-scale fishing and foraging settlements, episodic mobility, and networks of exchange that connected littoral and inland groups. The designation “Middle Horizon Caleta Huelen” used for this assemblage situates these individuals within a regional sequence of cultural change but does not imply direct affiliation to the highland Middle Horizon political systems; coastal lifeways often retained distinct trajectories.

Genetically, the tiny sample set (n = 3) offers a tentative snapshot rather than a definitive portrait. The detected Y-chromosome lineage Q and maternal lineages B2 and A2 are well-known Pan-American haplogroups with deep roots in the Americas; their presence at Caleta Huelen 12 is consistent with long-standing coastal and continental population histories. Limited evidence suggests continuity with broader Andean and coastal populations, but the small number of genomes means any model of migration, admixture, or local continuity must remain provisional until larger datasets are available.

In short: the site captures a coastal community engaged with regional lifeways at ca. 1100 BP; the genetic markers align with Indigenous American lineages, but archaeological and genetic sampling remain sparse.

The genetic dataset from Caleta Huelen 12 comprises three individuals (n = 3). Results show one Y‑chromosome lineage assigned to haplogroup Q and mitochondrial haplogroups distributed as B2 (two individuals) and A2 (one individual). These lineages are widely documented across the Americas and are interpreted as deep, autochthonous Indigenous lineages rather than evidence of recent external input.

Haplogroup Q is the predominant Y‑lineage among many Indigenous populations of the Americas and its presence here is consistent with male-line continuity in coastal Chile. Maternal haplogroups B2 and A2 are among the most common Native American mtDNA clades; B2 is often associated with populations from both coastal and inland South America, while A2 is similarly widespread. The combination seen at Caleta Huelen 12 does not by itself indicate specific migration events or precise kinship ties within the community.

Crucially, sample size limits the strength of inference. With only three genomes, population-level statistics (admixture proportions, within-site diversity, demographic modeling) are underpowered. Archaeogenetic interpretation should therefore treat these data as preliminary indicators: they confirm the presence of classical Native American lineages at this coastal locale around 1100 BP, but larger and more geographically distributed samples are required to resolve questions about local continuity, gene flow with highland groups, or demographic shifts associated with broader regional transitions.

Future work combining additional ancient genomes, isotopic dietary data, and detailed stratigraphic context could turn this evocative snapshot into a full portrait of biological and cultural history.