Dark Canyon 71 [Deadwood Fm]: Dresbachian, South Dakota

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Agnostida - Diplagnostidae
Pseudagnostina douvillei (Bergeron 1899)
2 individuals
Agnostida - Agnostidae
Hadragnostus modestus (Lochman 1944)
1 individual
Trilobita - Ptychopariida - Lonchocephalidae
Terranovella dorsalis (Hall 1863)
9 individuals
Trilobita - Ptychopariida - Tricrepicephalidae
Tricrepicephalus coria
1 individual
Tricrepicephalus tripunctatus
10 individuals
Trilobita - Ptychopariida - Kingstoniidae
Ankoura triangularis
3 individuals
Kingstonia bealesoides
3 individuals
Kingstonia scrinium
1 individual
Blountia eleanora
1 individual
Blountia sp. Walcott 1916
21 individuals
Trilobita - Ptychopariida - Crepicephalidae
Coosina ariston (Walcott 1916)
39 individuals
Crepicephalus snowyenis
6 individuals
Coosia alethes (Walcott 1916)
23 individuals
Trilobita - Ptychopariida - Marjumiidae
Coosella sp. Lochman 1936
1 individual
Trilobita - Olenida - Asaphiscidae
Blountiella cordilleria
7 individuals
see common names

Geography
Country:United States State/province:South Dakota County:Rapid City
Coordinates: 44.1° North, 103.2° West (view map)
Paleocoordinates:12.2° South, 82.5° West
Geographic resolution:small collection
Time
Period: Cambrian Epoch: Furongian
10 m.y. bin: Cambrian 5
*Period:Late/Upper Cambrian *Epoch:Merioneth
*Local age/stage:Marjuman
Key time interval: Dresbachian Trilobite zone:  Crepicephalus
Age range of interval: 497 - 485.4 m.y. ago
* legacy (obsolete) database fields
Stratigraphy
Formation:Deadwood Member:lower
Stratigraphy comments: AGE: Dresbachian; refined by A. Hendy (6/2009) on the basis of biostratigraphic data (= Crepicephalus zone).
Lithology and environment
Primary lithology: "limestone"
Secondary lithology: sandstone
Environment:transition zone/lower shoreface
Taphonomy
Modes of preservation:body,cast
Collection methods and comments
Collection excludes:all macrofossils
Collection methods:bulk,field collection
Reason for describing collection:taxonomic analysis
Metadata
Also known as:DC 71
Database number:7375
Authorizer:M. Patzkowsky Enterer:K. Straub
Modifier:A. Hendy Research group:marine invertebrate
Created:2000-05-23 18:18:20 Last modified:2009-06-12 01:56:02
Access level:the public Released:2000-05-23 18:18:20
Creative Commons license:CC BY
Reference information

Primary reference:
450. J. H. Stitt and P. J. Perfetta. 2000. Trilobites, Biostratigraphy, and Lithostratigraphy of the Crepicephalus and Aphelaspis zones, Lower Deadwood formation (Marjuman and Steptoean Stages, Upper Cambrian), Black Hills, South Dakota. Journal of Paleontology 74(2):199-223 [M. Patzkowsky/K. Straub/P. Wagner]