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| Stratigraphic diagram of the deposits at Arenosa Shelter showing the radiocarbon dates and estimated ages of the major cultural layers (dark gray) on the left and the vertical distributions of select "key markers" (dart and arrow points) on the right. The artifacts were laid atop the chart and photographed on a sunny day to create this instructive graphic. The shapes of some of the projectile points are obscured by shadow. TARL archives. |