Images of White Sands National Park Study Site Footprints
Figure 2. Top left: USGS research geologists Kathleen Springer and Jeff Pigati collecting seeds embedded in an ancient human footprint for radiocarbon dating. Top right: Multiple human trackways from Track Horizon 1 (white arrows), Track Horizon 3 (red arrows), and Track Horizon 4 (black arrows). Bottom left, right: Closeup photographs of excavated human trackways from Track Horizon 4.
Credit: Jeff Pigati & Kathleen Springer, USGS