BC-51 (LA 40395)

Information

The site of BC-51 (also known as LA 40395 or 29SJ395) is a small unit-pueblo site south side of the Chaco Wash (opposite to Pueblo Bonito and Pueblo Del Arroyo) in the Chaco Canyon (Washburn et al. 2011:1637). The site was excavated by the University of New Mexico field school between 1936-1937 under Frank Hibben (Washburn et al. 2011:1637). The vessels (two bowls and one pitcher) from this site were used as the control samples for the chemical study performed by Washburn et al. (2011:1637).

In this chemical analysis, theobromine and theophylline were recorded when the "substance was present at 5 ng/mL or higher. At concentrations less than 5ng/mL, signal noise precluded detection with confidence" and "the same convention applies to caffeine except that the quantification limit was 10 ng/mL" (Washburn et al. 2011, Supplementary Material).

Mapping coordinates approximate.

ID Other ID Type Subtype Uncal BP (years) ± 1 σ (years) Median cal BP (years) Lower cal BP (years) Upper cal BP (years) δ13C Contaminated?
Sample 52 ChemicalSample Caffeine, Theobromine, and Theophylline
Sample 53 ChemicalSample Caffeine, Theobromine, and Theophylline
Sample 56 ChemicalSample Caffeine, Theobromine, and Theophylline

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References Cited

Washburn, Dorothy K., William N. Washburn and Petia A. Shipkova
     2011    The Prehistoric Drug Trade: Widespread Consumption of Cacao in Ancestral Pueblo and Hohokam Communities in the American Southwest. Journal of Archaeological Science 38(7):1634-1640.