Spence Shale
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]
| Spence Shale Stratigraphic range: Cambrian, Miaolingian, Wuliuan ~507.5-506 Ma | |
|---|---|
 Hyolithe, 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 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
The Spence Shale spans the Albertella and Glossopleura biozones.[3]
Fauna
Generic list of the fauna of the Spence Shale:[4][5][6]
Soft-bodied
- Anomalocaris
- Canadaspis
- Caryosyntrips
- Dioxycaris
- Hurdia
- Isoxys
- Leanchoilia
- Meristosoma
- Mollisonia
- Sidneyia
- Tuzoia
- Utahcaris
- Waptia
- Yohoia
Trilobita
- 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
Brachiopoda
- Acrothele
- Dictyonina
- Diraphora
- Lingulella
- Micromitra?
- Wimanella
Echinodermata
- Ctenocystis
- Gogia
- Lyracystis
- Ponticulocarpus
- Totiglobus
Hemichordata
- Margaretia
- Sphenoecium
Lobopodia
- Acinocricus
Porifera
- Brooksella?
- Protospongia
- Vauxia
Trace Fossils
- 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
References
- 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.
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Archived from the original on 31 July 2014. Retrieved 8 July 2014.
| Cambrian localities |  | |
|---|---|---|
| Ordovician localities | ||
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