
The Bluffs Rockshelters site is comprised of a north and south series, separated by 70 feet of open grassland, in a terminal sandstone outcropping of a south-trending ridge on a known north-south trail considered to have been heavily used by nomadic tribal groups as a migration route.
The south rockshelter series is an outcrop comprised of an east face, a south face, and a west face, the full sweep of the east face being 6.19 m. A small detached knob of rock sits 89 cm from the east face. A second large east-facing outcropping wall is sited approximately twenty feet directly below the south shelter series.
The south wall of the complex shows erosion and graffiti, and one abstract petroglyph--a regular series of short vertical gouges each underscored by a bored hole, high up on the rock face.
The west walls of the south series form an undulating s-curve partially shielded by shrubs and trees and evidencing relatively unweathered rock face. On the open west-facing walls are found three possible early images: an incised turkey track, an incised storage jar (distorted by lichen), and an abstract skull carved in relief from the rock face formed by the overhang meeting the shelter wall.
The 'table top' formed by the flat darkly-weathered overhang covering the east and west shelters is just under 4 m from west edge to east edge, 6.8 m from north edge to south edge, and divided into four 'tongues' of greatly varying size. In the front center area of the largest tongue is a faint etched image of what the investigators recognized as a porcupine, an animal which is rarely seen in the southeast district in present day but which could certainly have been sustained in an earlier era of more plentiful tamarack growth. The image was somewhat enhanced when dampened.
The small knob of rock standing apart from the east face shelters displayed a low, deep indentation on the south face in which was found evidence of cooking fires. On the upper southwest "corner" of the knob, where the sandstone face would be turned away from a scouring wind, was found a possible prehistoric abstract petroglyph: a small (10.5 cm w x 7.6 cm h) grooved, partially concave oval bisected in width by an s-curve; a narrow grooved 'horseshoe;' a series of five short vertical grooves with flared tops; and a second series of shorter vertical grooves.