Spence Shale facts for kids

Quick facts for kids Spence Shale Stratigraphic range: Cambrian, Miaolingian, Wuliuan ~507.5-506Ma PreЄ Є O S D C P T J K Pg N ↓
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 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.

The type locality is Spence Gulch in southeastern Idaho, near the town of Liberty. It was first described by Charles Doolittle Walcott in 1908.

Stratigraphy

The Spence Shale spans the Albertella and Glossopleura biozones.

Fauna

Generic list of the fauna of the Spence Shale:

Arthropoda

Soft-bodied

• Anomalocaris
• Canadaspis
• Caryosyntrips
• Dioxycaris
• Hurdia
• Isoxys
• Leanchoilia
• Meristosoma
• Mollisonia
• Sidneyia
• Tuzoia
• Utahcaris
• Waptia
• Yohoia

Agnostida

• Pentagnostus
• Ptychagnostus

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

Mollusca

• Latouchella
• Scenella
• Wiwaxia

Lophotrochozoa

• Haplophrentis
• Hyolithellus
• Hyolithes

Echinodermata

• Ctenocystis
• Gogia
• Lyracystis
• Ponticulocarpus
• Totiglobus

Hemichordata

• Margaretia
• Sphenoecium

Priapulida

• Ottoia
• Selkirkia
• Wronascolex?

Lobopodia

• Acinocricus

Porifera

• Brooksella?
• Protospongia
• Vauxia

Problematica

• Banffia
• Eldonia
• Siphusauctum

Algae

• Marpolia

Cyanobacteria

• Morania

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