It preserves fossils dating back to the late Pennsylvanian to early Permian.

The Crestone Conglomerate Member consists of about 1,100–2,000 meters (3,600–6,600 ft) of red conglomerate, conglomeratic sandstone, sandstone, and minor siltstone and shale.

[1] The formation is exposed in the Sangre de Cristo Mountains in both southern Colorado and northern New Mexico.

[2] The informal lower members contains sparse fossiliferous limestone beds containing crinoids, brachiopods, stromatolites, fusulinids, and conodonts.

[1] Outcrops near the headwaters of the Pecos River include tetrapod footprints, identified as Batrachichnus, Limnopus, Ichniotherium, Tambachichnium, Dimetropus, and Dromopus.