Pukara of the Precordillera — 700 BP

Carved by wind and light, the Precordillera foothills of the Atacama hold the traces of communities active during the Late Intermediate Period (c. 12th–13th centuries CE). Archaeological data indicates occupation at Pukara-linked loci where small settlements clustered near seasonal water sources and caravan routes that threaded between coastal and highland ecologies. Radiocarbon-calibrated materials framing this individual place it between 1155 and 1260 CE, a time of regional reorganization after earlier highland polities.

Material culture in nearby sites suggests localized forms of architecture, pottery styles, and exchange in obsidian and marine goods, pointing to networks of mobility rather than large-scale empire. Limited evidence suggests that Pukara-associated groups in this part of the Precordillera adapted highland lifeways to an arid margin: mixed herding, opportunistic cultivation where microclimates allowed, and intensified trade across ecological zones.

Because this dataset currently rests on a single sampled individual, interpretive caution is essential. The archaeological context offers atmospheric, place-based clues about social grouping and landscape use, but broader claims about population movements, cultural boundaries, or sociopolitical structure require larger and better-dated series of sites and human remains.

Ancient DNA from the Pukara-associated individual yields Y-chromosome haplogroup Q and mitochondrial haplogroup B2 — lineages common among Indigenous peoples of the Americas. These assignments align broadly with continental patterns in South America where haplogroup Q is frequently observed on the paternal line and haplogroup B2 on the maternal line.

Because the dataset comprises only one genome (sample count = 1), genetic inferences must remain tentative. The presence of Q and B2 is consistent with genetic continuity in the Central Andean and coastal-Highland contact zones, but it does not by itself resolve questions about population structure, migration pulses, or local admixture events during the Late Intermediate Period. Archaeological signals of exchange and mobility could correspond to genetic gene flow, but linking specific cultural interactions to demographic change requires larger sample sizes and comparative datasets spanning the region and time periods before and after 1155–1260 CE.

Future aDNA sampling from neighboring Pukara sites, contemporaneous coastal settlements, and highland centers will be essential to test whether this individual reflects local continuity, incoming groups, or broader networked ancestry. For now, the genetic profile offers a cinematic but cautious bridge between a single life and the longue durée of Andean population history.