39MP3 is an archaeological site in McPherson County, South Dakota. It consists of a panel of rock art, on which designs have been pecked. The designs on this panel appear to resemble heads of bison, a theme echoed in other rock art panels in the area. (with 11 rock art sketches) (from partly NPS-funded project directed by Linea Sundstrom)

The site was listed on the National Register of Historic Places in 1993.

See also National Register of Historic Places listings in McPherson County, South Dakota

References