Table 1.
Radiocarbon dates on maize remains and wood charcoal from floors and features in excavated units at Paredones and Huaca Prieta
| Sample no. | Provenience | δ13C | Conventional radiocarbon (yrs BP) | 1σ-Calibrated age range (BP) | 2σ-Calibrated age range (BP) | Material |
| Unit 3 (Huaca Prieta) | ||||||
| AA76977 | Unit 3, floor 2 | −22.8 | 3530 ± 36 | 3827–3693 | 3849–3636 | Wood charcoal |
| Beta233649 | Unit 3, floor 3 | −10.2 | 1090 ± 40 | 973–911 | 1052–809 | Corn cob |
| AA76978 | Unit 3, floor 5a | −19.6 | 3567 ± 40 | 3841–3717 | 3901–3643 | Wood charcoal |
| AA76979 | Unit 3, floor 5b | −19.6 | 3758 ± 40 | 4142–3978 | 4216–3901 | Wood charcoal |
| Beta247695 | Unit 3, stratum 8, below floor 6 | −20.8 | 4000 ± 40 | 4510–4296 | 4520–4245 | Organic sediment |
| Unit 16 | ||||||
| Beta263319 | Unit 16, floor 3 | −11.7 | 830 ± 40 | 728–678 | 767–664 | Corn cob |
| AA86935 | Off-mound domestic unit 16, floor 13 | −22.6 | 6310 ± 33 | 7251–7162 | 7266–7021 | Wood charcoal |
| Unit 20 (Paredones) | ||||||
| AA86938 | Unit 20, stratum 5–6 | −11.2 | 1130 ± 27 | 1051–936 | 1055–831 | Corn cob |
| AA86936 | Unit 20, stratum 5b | −23.8 | 4783 ± 31 | 5578–5330 | 5583–5324 | Wood charcoal |
| Beta263322 | Unit 20, stratum 6a | −9.3 | 1310 ± 40 | 1268–1143 | 1279–1076 | Corn cob |
| AA86932 | Unit 20, stratum 6b-18 | −23.5† | 4770 ± 35 | 5577–5321 | 5582–5321 | Husk fragment |
| AA86937 | Unit 20, stratum 6b-18 | −25.8 | 4849 ± 31 | 5589–5479 | 5603–5333 | Charred wood |
| Unit 15/21 (Huaca Prieta) | ||||||
| AA86941 | Unit 21, floor 2-3-16 | −10.6 | 3599 ± 29 | 3889–3728 | 3956–3704 | Charred corn cob |
| AA86931 | Unit 21, floor 3-2 | −25.2 | 3638 ± 29 | 3957–3838 | 3982–3728 | Wood charcoal |
| AA86946 | Unit 21, floor 9 | −11.9 | 3783 ± 41 | 4148–3988 | 4235–3928 | Charred corn cob |
| AA75322 | Unit 21, floor 26 | −29.4 | 5018 ± 86 | 5860–5599 | 5911–5488 | Wood charcoal |
| AA85507 | Unit 15, first mound layer | −25.6 | 6522 ± 54 | 7429–7323 | 7474–7268 | Wood charcoal |
| Unit 22 (Paredones) | ||||||
| AA86934 | Unit 22, floor 6 | −13.4 | 4181 ± 34 | 4809–4570 | 4821–4527 | Charred corn cob |
| Beta263988 | Unit 22, floor 10 | — | 105.4 ± 5 | 132–44 | 133–34 | Corn cob |
| Beta263320 | Unit 22, floor 10, capa 14 | −24.5 | 4590 ± 40 | 5308–5062 | 5435–5044 | Charred material |
| Beta263321 | Unit 22, floor 15 | −25.6 | 4790 ± 40 | 5580–5331 | 5585–5325 | Charred material |
| AA86947 | Unit 22, floor 16, fill 10 | −24.0 | 4898 ± 49 | 5644–5483 | 5711–5335 | Wood charcoal |
| AA88761* | Unit 22, floor 18-3 | −30.7 | 1.0751 ± 0.0047 (postbomb) | — | — | Corn cob |
| Beta27823* | Unit 22, floor 18-3 | −9.8 | 750 ± 40 | 679–571 | 722–563 | Corn cob |
| Beta27804* | Unit 22, floor 18-3 | −9.0 | 770 ± 40 | 720–578 | 729–569 | Corn cob |
| Beta282127* | Unit 22, floor 18-3 | −9.2 | 790 ± 40 | 721–662 | 738–572 | Corn cob |
| OS86020* | Unit 22, floor 18-3 | −10.3 | 5900 ± 40 | 6734–6569 | 6775–6504 | Husk and shank |
| AA83260 | Unit 22, floor 24 | −26.0 | 5750 ± 60 | 6561–6405 | 6640–6319 | Wood charcoal |
| Bird's HP-3 (Huaca Prieta) | ||||||
| AA81926 | HP-3, stratum 5 | −28.0 | 3394 ± 40 | 3634–3485 | 3688–3464 | Wood charcoal |
| AA86943 | HP-3, stratum 14 | −24.6 | 3806 ± 28 | 4213–3999 | 4233–3985 | Wood charcoal |
| AA86940 | HP-3, stratum 19 | −25.6 | 3875 ± 30 | 4287–4104 | 4406–4090 | Wood charcoal |
| AA81924 | HP-3, stratum 22 | −23.5 | 3687 ± 40 | 4063–3876 | 4084–3838 | Wood charcoal |
| AA81927 | HP-3, stratum 23 | −17.3 | 3728 ± 40 | 4084–3927 | 4147–3875 | Wood charcoal |
| Beta278050 | HP-3, stratum 28(33) | −14.9 | 3740 ± 40 | 4087–3931 | 4149–3839 | Charred corn cob |
| AA82121 | HP-3, upper stratum 52 (39) | — | 5980 ± 40 | 6789–6676 | 6882–6657 | Cotton yarn |
| AA81907 | First mound layer: lower stratum 52–53 | −23.8 | 6170 ± 45 | 7154–6899 | 7162–6808 | Wood charcoal |
*Dates processed on same integrated cob/shank/husk from floor 18.
†Aberrant δ13C assay. All dates in Table 1 were calibrated using shcal04 (25).