Late date of human arrival to North America: Continental scale differences in stratigraphic integrity of pre-13,000 BP archaeological sites
Fig 4
Map of sites used in this study.
(1) Dry Creek and Owl Ridge, (2) Holzman South, Swan Point, and Broken Mammoth, (3) Cooper’s Ferry, (4) Alm Shelter; (5) Helen Lookingbill; (6) Hell Gap; (7) Gault and Debra L. Friedkin, (8) Shawnee-Minisink. Light blue polygons show the estimated extent of the continental ice sheets at 14,900 BP from Dalton et al. [57]. Digital elevation model of North America is from the USGS Global Multi-resolution Terrain Elevation Dataset [58].