A Re-evaluation of Late Prehistoric and Archaic Chronology in the Rio Grande Delta of South Texas, The University of Texas at Austin.

Samples that cite this reference

Lab number Site Province / State Normalized age δ13C (per mil)
Beta-51889 41ZP144 650 ± 60
GX-15254 41WY67 (human burial, isolated) 4495 ± 350