Lightning Creek X18, Deadwood Formation, Custer county South Dakota - Stitt 1998: Menevian, South Dakota
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Agnostida
- Agnostidae
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? Kormagnostus beltensis
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3 specimens | |||||||||
| 2-1 | ||||||||||
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Kormagnostus seclusus
(Walcott 1884)
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1 specimen | |||||||||
| 0-1 | ||||||||||
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Trilobita
- Ptychopariida
- Plethopeltidae
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Arapahoia spatulata
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1 specimen | |||||||||
| 1-0-0 | ||||||||||
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Trilobita
- Olenida
- Cedariidae
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Cedarina dakotaensis
Stitt 1998
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3 specimens | |||||||||
| 1-2-0 | ||||||||||
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Lingulata
- Lingulida
- Obolidae
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Dicellomus sp.
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| see common names | ||||||||||
Geography
| Country: | United States | State/province: | South Dakota | County: | Custer |
| Coordinates: | 43.7° North, 103.7° West (view map) | ||||
| Paleocoordinates: | 11.7° South, 87.6° West | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Cambrian | Epoch: | Miaolingian |
| 10 m.y. bin: | Cambrian 4 | ||
| *Period: | Late/Upper Cambrian | *Epoch: | Late/Upper Caerfai |
| *International age/stage: | Menevian | *Local age/stage: | Marjuman stage |
| Key time interval: | Menevian | Zone: | Cedarina dakotaensis |
| Age range of interval: | 504.5 - 499.5 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Deadwood | ||
| Local section: | Lightning Creek | Local bed: | 18 feet from base of section, but not in place |
| Stratigraphic resolution: | bed |
Lithology and environment
| Primary lithology: | dolomitic,glauconitic,gray,red or brown lithified grainstone |
| Secondary lithology: | "shale" |
| Lithology description: section is 19.8 m thick. samples taken from limestone, 5.5 to 7.6 m thick of mosthly grayish-brown, and reddish-purple, thin bedded glauconitic, slightly dolomitic, fossiliferous grainstone interbedded with lime grainstone, shale and fine grained sandstones. the flat pebbles consist of laminated peloidal limestone or lime mudstone. grainstones are probably tempestites. | |
| Environment: | shoreface |
Taphonomy
Collection methods and comments
| Collection excludes: | some genera |
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: Collections made by Christina Lochman-Balk. The lithologic descriptions of the sections are derived from Lochman-Balk's field notes and Stitt's field reconnaissance. | |
| Taxonomic list comments:Species of Arapahoia, Menomonia, Hardyoides, Welleraspis, Kormagnostus, and Kingstonia are found in the Black Hills, but their presence in measured beds is not given. Abbreviations are as follows: if three numbers (cranidia-pygidia-librigenae) for polymeroids and two numbers (cephala-pygidia) for agnostostids. | |
Metadata
| Database number: | 8248 | ||
| Authorizer: | M. Patzkowsky | Enterer: | P. Borkow | Research group: | marine invertebrate |
| Created: | 2000-07-02 17:02:23 | Last modified: | 2001-08-30 17:52:51 |
| Access level: | the public | Released: | 2001-03-27 12:03:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 558. | J. H. Stitt. 1998. Trilobites from the Cedarina dakotaensis zone, lowermost part of the Deadwood Formation, (Marjuman Stage, Upper Cambrian), Black Hills South Dakota. Journal of Paleontology 72(6):1030-1046 [M. Patzkowsky/P. Borkow/J. Alroy] |