The unit contains middle to upper Missourian (Kasimovian)
fusulinids[5] and
conodonts, including several species of the fusulinid Triticites and the conodont Idiognathodus symmetricus, related species, and species of Streptognathodus. These species indicate that the Beeman Formation is entirely Kasimovian in age.[3] The formation has a diverse
coprofauna.[6] The formation has also produced a
lacustrine fauna from one of its shell beds, including the
horseshoe crabEuproops danae.[7]
History of investigation
The unit was first named by Lloyd C. Pray in 1954[1] and a type section was designated in 1959.[5] Pray originally assigned the formation to the Magdalena Group, but the Magdalena Group has subsequently been abandoned.[8][2]
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abKues, B.S.; Giles, K.A. (2004). "The late Paleozoic Ancestral Rocky Mountain system in New Mexico". In Mack, G.H.; Giles, K.A. (eds.). The geology of New Mexico. A geologic history: New Mexico Geological Society Special Volume 11. pp. 95–136.
ISBN9781585460106.
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abcPray, L.C., 1959, "Stratigraphic and structural features of the Sacramento Mountain Escarpment, New Mexico", IN Pray, L.C., leader, Guidebook for joint field conference in the Sacramento Mountains of Otero County, New Mexico: Society of Economic Paleontologists and Mineralogists, Permian Basin Section, Field Trip Guidebook, Joint field conference of Society of Economic Paleontologists and Mineralogists, Permian Basin Section, and Roswell Geological Society, Alamogordo, NM, p. 86-130.