Lead Bell Shale, location: 781: Delamaran, Utah

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Ctenocystoidea - Ctenocystoida - Ctenocystidae
Ctenocystis utahensis Robison and Sprinkle 1969
Eldoniidae
Eldonia ludwigi Walcott 1911
Hyolithida - Hyolithidae
Hyolithes comptus
Haplophrentis reesei Babcock and Robison 1988
Hyolithes idahoensis Resser 1938
Rhynchonellata - Orthida - Bohemiellidae
Wimanella sp. Walcott 1908
Tergomya - Scenellidae
Scenella radians
unclassified
Wiwaxia corrugata (Matthew 1899)
Luolishaniida - Collinsovermidae
Acinocricus stichus Conway-Morris and Robison 1988
unclassified
Arthropoda indet. Latreille 1829
Tuzoida - Tuzoiidae
Tuzoia retifera Walcott 1912
Radiodonta - Anomalocarididae
Anomalocaris nathorsti Walcott 1911
unclassified
Branchiocaris pretiosa (Resser 1929)
Malacostraca
Dioxycaris argenta
Canadaspidida - Canadaspididae
Canadaspis cf. perfecta (Walcott 1912)
Megacheira - Leanchoiliida - Leanchoiliidae
Leanchoilia hanceyi Briggs and Robison 1984
Palaeoscolecida - Cricocosmida - Palaeoscolecidae
Palaeoscolex ratcliffei García-Bellido et al. 2013
Selkirkiimorpha - Selkirkiidae
Selkirkia cf. columbia Conway Morris 1977
Selkirkia spencei Conway Morris and Robison 1986
Hexactinellida - Reticulosa - Protospongiidae
Brooksella sp. Bassler 1941
Demospongiae - Vauxiidae
Vauxia gracilenta Walcott 1920
Vauxia magna Rigby 1980
unclassified
Marpolia sp. Walcott 1919
Morania fragmenta Walcott 1919
Bryopsidophyceae - Caulerpales - Caulerpaceae
Margaretia dorus Walcott 1931
unclassified
Yuknessia simplex Walcott 1919
Canadidae
Canadia sp. Walcott 1911
see common names

Geography
Country:United States State/province:Utah
Coordinates: 42.0° North, 112.0° West (view map)
Paleocoordinates:5.7° South, 89.7° West
Basis of coordinate:estimated from map
Geographic resolution:local area
Time
Period: Cambrian
10 m.y. bin: Cambrian 3
Key time interval: Delamaran Trilobite zone:  Glossopleura
Age range of interval: 511 - 506.5 m.y. ago
Stratigraphy
Formation:Lead Bell Shale
Stratigraphic resolution:bed
Stratigraphy comments: Listed as Lower to Middle Cambrian; Glossopleura zone
Lithology and environment
Primary lithology:gray poorly lithified silty "shale"
Lithology description: Hard, medium-dark gray, flaggy parting, noncalcareous mudshale
Environment:platform/shelf-margin reef
Geology comments: Briggs and Robison (1984) notes that the fauna includes a mixture of typically deeper and shallower species since the carbonate bank was poorly developed during this time and there was little barrier to intermingling; Liddell, Wright, and Brett (1997) note that Langston Fm. (Spence Shale) deepens from Antimony Canyon (primarily outer carbonate belt) to Miners Hollow [both Utah] to Oneida Narrows [Idaho] (outer detrital belt/deep ramp)
Taphonomy
Modes of preservation:body,soft parts
Degree of concentration:-single event
Size of fossils:macrofossils,mesofossils
Spatial orientation:life position
Articulated whole bodies:some
Size sorting:poor
Fragmentation:occasional
Feeding/predation traces:repair scars
Temporal resolution:snapshot
Spatial resolution:autochthonous
Collection methods and comments
Reason for describing collection:biostratigraphic analysis
Taxonomic list comments:Glossopleura, Oryctocephalus, and Peronopsis bonnerensis zones; loc. 781 bears most of the fauna
Metadata
Also known as:Spence Shale
Database number:77218
Authorizer:P. Novack-Gottshall Enterer:P. Hearn
Modifier:P. Wagner Research group:marine invertebrate
Created:2008-01-02 07:39:53 Last modified:2019-05-14 10:08:05
Access level:the public Released:2008-01-02 07:39:53
Creative Commons license:CC BY
Reference information

Primary reference:
26137. D. E. G. Briggs and R. A. Robison. 1984. Exceptionally preserved nontrilobite arthropods and Anomalocaris from the Middle Cambrian of Utah. University of Kansas Paleontological Contributions 111:1-23 [P. Novack-Gottshall/P. Hearn/J. Alroy]