Current evidence allows multiple models for the peopling of the Americas

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Science Advances  08 Aug 2018:
Vol. 4, no. 8, eaat5473
DOI: 10.1126/sciadv.aat5473
  • Fig. 1 Northwest North America with archeological sites older than 10,000 calibrated years before the present (Supplementary Materials) and proposed colonization routes: IFC and NPC.

    Glacial ice extent (white) from (48), and archeological site and geological sample locations summarized in (12, 78). Laurentide Ice Sheet limits (dotted lines) from (55). ka, thousand years; IFC, ice-free corridor; NPC, North Pacific coast.

  • Fig. 2 Sea-level curves by region and periods above modern sea level (in thousands of calibrated years before the present) (that is, pre-Clovis occupations would be potentially accessible if they are extant), adapted from data in (38, 79).
  • Fig. 3 Chronology of the central IFC.

    OSL and IRSL dates indicate minima ages of deglaciation and pro-glacial lake drainage (55), and calibrated 14C dates indicate minima dates for fauna and vegetation (12, 35, 61, 63, 8082). Demic expansion estimates of Native American ancestors from (13). All dates are shown with 1 SD.

Supplementary Materials

  • Supplementary Materials

    This PDF file includes:

    • Table S1. Late Pleistocene and Early Holocene components illustrated in Fig. 1.
    • Fig. S1. Locations mentioned in the text.
    • References (83141)

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