Ninemile 21, 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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4 specimens | |||||||||
| 2-2 | ||||||||||
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Kormagnostus seclusus
(Walcott 1884)
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1 specimen | |||||||||
| 1-0 | ||||||||||
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Trilobita
- Ptychopariida
- Catillicephalidae
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Welleraspis spp.
Kobayashi 1935
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3 specimens | |||||||||
| 3-0-0 (group #2) | ||||||||||
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Trilobita
- Ptychopariida
- Norwoodiidae
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Hardyoides tenerus
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6 specimens | |||||||||
| 6-0-0 | ||||||||||
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Trilobita
- Ptychopariida
- Marjumiidae
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Modocia centralis
(Whitfield 1877)
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14 specimens | |||||||||
| 13-1-0 | ||||||||||
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Modocia oweni
(Meek and Hayden 1861)
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4 specimens | |||||||||
| 1-2-1 | ||||||||||
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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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27 specimens | |||||||||
| 20-4-3 | ||||||||||
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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 county |
| Coordinates: | 43.7° North, 103.7° West (view map) | ||||
| Paleocoordinates: | 11.6° 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 St. David's |
| *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
Lithology and environment
| Primary lithology: | glauconitic,green lithified sandstone |
| Lithology description: section is 29 m thick. unit consists of glauconitic sandstone which is dark green, thin to medium-bedded, fine to medium sandstone that varies from 2.7 tp 3.9 m thick. | |
| Environment: | offshore |
Taphonomy
| Modes of preservation: | replaced with calcite,replaced with phosphate |
Collection methods and comments
| Collection excludes: | some genera |
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: Collection made by Christina Lochman-Balk. The lithologic descriptions of the section 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 specific 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 agnostids. | |
Metadata
| Database number: | 8275 | ||
| Authorizer: | M. Patzkowsky | Enterer: | P. Borkow | Research group: | marine invertebrate |
| Created: | 2000-07-03 19:26:55 | 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] |