Spence Shale

Spence Shale
Stratigraphic range: Cambrian, Miaolingian, Wuliuan
~507.5-506 Ma

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Spence Shale; Stratigraphic range: Cambrian, Miaolingian, Wuliuan; ~507.5-506 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
	, Spence Shale
Type	Member
Thickness	9–120 m (30–394 ft)
Lithology
Primary	carbonate mudstones
Other	carbonate-rich siliciclastic mudstones and
Location
Region	Idaho, Utah
Country	United States
Type section
Named for
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 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 and biozones.^[3]

Fauna[]

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

Arthropoda[]

[]

Agnostida[]

Pentagnostus
Ptychagnostus

Trilobita[]

Brachiopoda[]

Mollusca[]

Priapulida[]

Lobopodia[]

Acinocricus
Hallucigenia

Porifera[]

Problematica[]

Algae[]

Marpolia

Cyanobacteria[]

Morania

[]

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". Retrieved 17 December 2021. {{cite web}}: |author= has generic name (help)

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[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.

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v t Burgess Shale-type preservation
Cambrian localities	Burgess Shale Chengjiang Emu Bay Shale Kinzers Formation Pioche Shale Poleta Formation Sirius Passet Spence Shale Wheeler Shale
Ordovician localities	Soom Shale Fezouata Formation Winneshiek Shale Llanfallteg Formation