[1][2] It preserves fossils dating back to the Kasimovian Age of the Pennsylvanian Period.

[3] The Beeman Formation consists of cyclic[4] shale and argillaceous limestone with some conglomerate.

[1] The formation is interpreted as cyclic deposition on a continental shelf following rejuvenation of the Pedernal uplift of the Ancestral Rocky Mountains.

[6] The formation has also produced a lacustrine fauna from one of its shell beds, including the horseshoe crab Euproops danae.

[7] The unit was first named by Lloyd C. Pray in 1954[1] and a type section was designated in 1959.