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
↓
TypeMember
Thickness9–120 m (30–394 ft)
Lithology
Primarycarbonate mudstones
Othercarbonate-rich siliciclastic mudstones and Wackestones
Location
RegionIdaho, Utah
CountryUnited States
Type section
Named forSpence Gulch
Named byCharles 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
Main article: Burgess Shale type fauna

Generic list of the fauna of the Spence Shale:[4][5][6]

Arthropoda

Soft-bodied

Agnostida

Trilobita

Brachiopoda

Mollusca

Lophotrochozoa

Echinodermata

Hemichordata

Priapulida

Lobopodia
  • Acinocricus

Porifera

Problematica

Algae

Cyanobacteria

Trace Fossils
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See also

References
  1. 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.
  2. Walcott, C.D. 1908. Cambrian Geology and Palaeontology. Smithsonian Museum, Miscellaneous Collections, 53.
  3. 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.
  4. 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.
  5. 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.
  6. 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.


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