AMS dated maize pollen samples recovered from an ancient woodrat midden, CC-3, located in a south-facing cliff face 2.15 km NW of Pueblo Bonito in Chaco Canyon (Hall 2010).
| 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? |
|---|---|---|---|---|---|---|---|---|---|---|
| 503 | Beta-218109 | MicroSample | pollen | 3940 | 40 | 4383 | 4517 | 4248 | No | |
| 502 | Beta-222731 | MicroSample | pollen | 2650 | 40 | 2767 | 2849 | 2731 | No |