These are polymorphic figures a typical portable rock art motif seen in many postings on this blog. They are of similar execution to achieve the images on the same kind of stone material, probably desired for its solid white color and light-reflective properties.
The presence of two artifacts from the same in-situ site, with similar modifications and with typical iconic properties, supports the hypothesis that these are intentional art works. Being with the oldest directly dated artifact in America makes them the oldest dated American art and among the 10 or 20 oldest dated artworks in the world.
Read the archaeologist's report and the geochronologist's report here.