Beeman Formation
| Beeman Formation | |
|---|---|
| Stratigraphic range: | |
| Type | Formation |
| Underlies | Holder Formation |
| Overlies | Gobbler Formation |
| Thickness | 350–500 ft (110–150 m) |
| Lithology | |
| Primary | Shale |
| Other | Limestone, conglomerate |
| Location | |
| Coordinates | Lua error: callParserFunction: function "#coordinates" was not found. |
| Region | New Mexico |
| Country | United States |
| Type section | |
| Named for | Beeman Canyon |
| Named by | L.C. Pray |
| Year defined | 1954 |
Beeman Formation (the United States) Beeman Formation (New Mexico) | |
The Beeman Formation is a geologic formation in the Sacramento Mountains of New Mexico.[1][2] It preserves fossils dating back to the Kasimovian Age of the Pennsylvanian Period.[3]
Description
[edit | edit source]The Beeman Formation consists of cyclic[4] shale and argillaceous limestone with some conglomerate. The thickness is 350–500 ft (110–150 m).[5] The formation overlies the Gobbler Formation and is overlain by the Holder Formation.[1]
The formation is interpreted as cyclic deposition on a continental shelf following rejuvenation of the Pedernal uplift of the Ancestral Rocky Mountains.[4]
Fossils
[edit | edit source]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 crab Euproops danae.[7]
History of investigation
[edit | edit source]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]
See also
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References
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- ^ a b c Pray, 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.
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