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Geologic context and track-maker demographics of White Sands Study Site

By Climate Research and Development Program August 2021 (approx.)
diagram of composite stratigraphy of human footprint layers
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Left: Oxygen isotope (δ18O) data from Greenland ice core records highlighting Dansgaard-Oeschger (D-O) events 1-8. Middle: Composite stratigraphy of the human footprint layers, radiocarbon ages, and dominant hydrologic regime for sediments exposed in the trench. Filled circles denote radiocarbon samples. Trackway horizons (TH) 1-8 are shown in their correct stratigraphic positions. Right: Summary of footprint evidence on each horizon. Modified from Bennet et al. 2021.

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Credit: Jeff Pigati & Kathleen Springer, USGS

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