Perttula et al. 2016, The Caddo Archaeology of the San Pedro Creek Valley, Houston County, in East Texas

Samples that cite this reference

Lab number Site Province / State Normalized age δ13C (per mil)
Beta-206843 41HO216 (Butler Branch) 1520 ± 70 -26.5
Beta-206844 41HO216 (Butler Branch) 770 ± 40 -26.0