Well FT 3, Unit 4: Rhuddanian, Russian Federation
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Pterobranchia
- Graptoloidea
- Normalograptidae
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Normalograptus sp.
Legrand 1987
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Gastropoda
- Euomphalina
- Platyceratidae
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Platyceras aff. cornutum
(Hisinger 1837)
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| recombined as Platyostoma cornutum | ||||||||||
| "ex gr. P. cornutum" - originally entered as "Platyceras aff. cornutum" | ||||||||||
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Cephalopoda
- Dissidocerida
- Geisonoceratidae
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Geisonoceras kureikense
Zhuraleva 1964
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Cephalopoda
- Discosorida
- Entimoceratidae
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Edenoceras hiliferum
Miagkova 1967
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Bivalvia
- Cyrtodontida
- Antipleuridae
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Sibirinka amora n. gen., n. sp.
Bogolepova and Kříž 1995
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| nov. gen. et nov. sp. | ||||||||||
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Strophomenata
- Strophomenida
- Plectambonitidae
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Plectambonitidae indet.
Kozlowski 1929
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| gen. et sp. indet. | ||||||||||
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Strophomenata
- Strophomenida
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Kentronetes conulus
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| originally entered as "Kentronites conulus" | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Russian Federation | State/province: | Siberia | County: | Bahkta Region |
| Coordinates: | 49.4° North, 136.4° East (view map) | ||||
| Paleocoordinates: | 34.0° North, 64.6° East | ||||
| Basis of coordinate: | based on political unit | ||||
| Geographic resolution: | small collection |
Time
| Period: | Silurian | Epoch: | Llandovery |
| Stage: | Rhuddanian | 10 m.y. bin: | Silurian 1 |
| *Period: | Early/Lower Silurian | *Epoch: | Early/Lower Llandovery |
| *International age/stage: | Late/Upper Rhuddanian | *Local age/stage: | Early/Lower - Middle Mojerokan |
| Key time interval: | Rhuddanian | Zone: | Climacograptus cyphus |
| Age range of interval: | 443.80000 - 440.80000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Local bed: | Unit 4 | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Unnamed formation; shown as strat. equiv. of Chamba Fm. | |||||
Lithology and environment
| Primary lithology: | black lithified argillaceous siltstone |
| Secondary lithology: | "limestone" |
| Environment: | marine indet. |
| Geology comments: Black graptolitic mudstones and dark grey clayey cephalopod limestone. | |
Taphonomy
| Modes of preservation: | body |
Collection methods and comments
| Collection methods: | core,field collection |
| Reason for describing collection: | taxonomic analysis |
| Taxonomic list comments:Graptolites in mudstone, everything else in limestone. | |
Metadata
| Database number: | 3343 | ||
| Authorizer: | J. Alroy | Enterer: | M. Sommers |
| Modifier: | C. Visaggi | Research group: | marine invertebrate |
| Created: | 1999-07-30 12:21:14 | Last modified: | 2004-03-11 16:25:06 |
| Access level: | the public | Released: | 2000-11-20 13:53:19 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 185. | O. K. Bogolepova and J. Kříž. 1995. Ancestral forms of Bohemian type Bivalvia from the lower Silurian of Siberia (Tungusskaja Syneclise, Russia). Géobios 28(6):691-699 [J. Alroy/M. Sommers/P. Wagner] |