Spence Shale
| Spence Shale | |
|---|---|
| Stratigraphic range: Cambrian, Miaolingian, Wuliuan ~ | |
 Hyolitha, Spence Shale | |
| Type | Member |
| Thickness | 9–120 m (30–394 ft) |
| Lithology | |
| Primary | carbonate mudstones |
| Other | carbonate-rich siliciclastic mudstones and Wackestones |
| Location | |
| Region | Idaho, Utah |
| Country | United States |
| Type section | |
| Named for | Spence Gulch |
| Named by | Charles Doolittle Walcott |
The Spence Shale is the middle member of the Langston Formation in southeastern Idaho and northeastern Utah. It is exposed in the Bear River Range, the Wasatch Range and the Wellsville Mountains. It is known for its abundant Cambrian trilobites and the preservation of Burgess Shale-type fossils.[1]
The type locality is Spence Gulch in southeastern Idaho, near the town of Liberty. It was first described by Charles Doolittle Walcott in 1908.[2]
Stratigraphy
[edit | edit source]The Spence Shale spans the Albertella and Glossopleura biozones.[3]
Fauna
[edit | edit source]Generic list of the fauna of the Spence Shale:[4][5][6]
- Anomalocaris
- Canadaspis
- Caryosyntrips
- Dioxycaris
- Hurdia
- Isoxys
- Leanchoilia
- Meristosoma
- Mollisonia
- Sidneyia
- Tuzoia
- Utahcaris
- Waptia
- Yohoia
- Alokistocare
- Alokistocarella
- Amecephalus
- Athabaskia
- Bathyuriscus
- Bythicheilus
- Chancia
- Ehmaniella
- Glossopleura
- Kochina
- Kootenia
- Ogygopsis
- Olenoides
- Oryctocara
- Oryctocephalites
- Oryctocephalus
- Pagetia
- Piochaspis
- Polypleuraspis
- Ptychoparella
- Solenopleura
- Syspacephalus
- Thoracocare
- Utia
- Zacanthoides
Algae
[edit | edit source]- Archaeonassa
- Arenicolites
- Aulichnites
- Bergaueria
- Chloephycus
- Conichnus
- Coprolite
- Cruziana
- Dimorphichnus
- Diplichnites
- Gordia
- Gyrophyllites
- Halopoa
- Lockeia
- Monomorphichnus
- Nereites
- Phycodes
- Phycosiphon
- Planolites
- Protovirgularia
- Rusophycus
- Sagittichnus
- Scolicia
- Taenidium
- Teichichnus
- Tomaculum
- Treptichnus
- Trichophycus
See also
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- List of fossiliferous stratigraphic units in Idaho
- List of fossiliferous stratigraphic units in Utah
- Paleontology in Idaho
- Paleontology in Utah
References
[edit | edit source]- ^ Kimmig, J., Strotz, L.C., Kimmig, S.R., Egenhoff, S.O., Lieberman, B.S. 2019. The Spence Shale Lagerstätte: an important window into Cambrian biodiversity. Journal of the Geological Society of London, 176, 609–619.
- ^ Walcott, C.D. 1908. Cambrian Geology and Palaeontology. Smithsonian Museum, Miscellaneous Collections, 53.
- ^ Kimmig, J., Strotz, L.C., Kimmig, S.R., Egenhoff, S.O., Lieberman, B.S. 2019. The Spence Shale Lagerstätte: an important window into Cambrian biodiversity. Journal of the Geological Society of London, 176, 609–619.
- ^ Kimmig, J., Strotz, L.C., Kimmig, S.R., Egenhoff, S.O., Lieberman, B.S. 2019. The Spence Shale Lagerstätte: an important window into Cambrian biodiversity. Journal of the Geological Society of London, 176, 609–619.
- ^ Wen, R., Babcock, L.E., Peng, J., Robison, R.A. 2019. New edrioasteroid (Echinodermata) from the Spence Shale (Cambrian), Idaho, USA: further evidence of attachment in the early evolutionary history of edrioasteroids. Bulletin of Geosciences, 94, 115–124.
- ^ Hammersburg, S.R., Hasiotis, S.T., Robison, R.R. 2018. Ichnotaxonomy of the Cambrian Spence Shale Member of the Langston Formation, Wellsville Mountains, Northern Utah, USA. Paleontological Contributions, 20, 1–66.
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