I recently followed an ancient Native American trail out to a water tank and petroglyph site. What got my attention to this site was the report of historical inscriptions and the fact that it is way off of other Native American trails I knew about.
The petroglyphs themselves are unusual in that they are not all abstract geometric forms; some figures have bent arms and legs. This suggests they were made in the late historic period. There is also a horseback rider with what looks like a cowboy hat, which further suggests historic contact.
