Clovis points from the Gault site. From the left: an unfinished preform, nearly finished; two finished (and then broken); and two used (and repeatedly resharpened) specimens. The yellow staining is caused by iron-rich groundwater, while the white encrustation is calcium carbonate, which is also carried by groundwater. In some areas of the site, the lower Clovis deposits are beneath the water table and can only be reached during dry spells and with the aid of pumping.
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