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- Lab number
- SI-2422
- Material dated
- Seeds
- Taxa dated
- Zea mays
- Type of date
- Archaeological
- Locality
- Wayne
- Date uploaded
- January 18, 2024
- Updater
- Wyoming Team
- Date updated
- December 31, 2020
- Measured Age
- 1765 ± 70
- Normalized Age
- 2075 ± 70
- δ13C (per mil)
- -12.0
- Context
- The uncorrected date was 1765 (310 years was originally added by the Smithsonian lab as a correction factor instead of the 220 years used on the other corn dates from the same cache). The date shown here uses the standard correction used by Geib and Bungart (1989) and accepted by Schroedl and Coulam. Shelled corn cached in a skin bag, probably Unit IVc; recovered during 1973 testing. Date corrected for fractionation by lab. Rose Spring C/N proj pts in assoc; 4 of 6 provenienced arrow shafts are from Stratum Vb. Terminal Archaic, intensive use of site; probably 2 separate occupational periods, finally ending at ca. AD 650.
- Additional information
- radiometric
- Comments
- Corrections per Geib (1996) and Schroedl and Coulam (1994); maize cache average date of 1824 +39 BP; assumed 13C of -12