Unit VI - Volga River composite section (Barremian): Barremian, Russian Federation
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Bivalvia
- Pectinida
- Pectinidae
|
|||||||
Mclearnia imperialis
|
|||||||
Gastropoda
- Patellidae
|
|||||||
Cymbula sp.
Adams and Adams 1854
|
|||||||
Cephalopoda
- Belemnitida
|
|||||||
Praeoxyteuthis cf. hibolitiformis
|
|||||||
Praeoxyteuthis ex gr. jasicofiana
|
|||||||
Praeoxyteuthis sp.
|
|||||||
see common names |
Geography
Country: | Russian Federation |
Coordinates: | 54.2° North, 48.4° East (view map) |
Paleocoordinates: | 47.3° North, 50.6° East |
Basis of coordinate: | stated in text |
Geographic resolution: | local area |
Time
Period: | Cretaceous | Epoch: | Early/Lower Cretaceous |
Stage: | Barremian | 10 m.y. bin: | Cretaceous 2 |
Key time interval: | Barremian | ||
Age range of interval: | 129.40000 - 125.00000 m.y. ago |
Stratigraphy
Local bed: | 23 m | ||||
Regional section: | Volga River | ||||
Stratigraphic resolution: | group of beds | ||||
Stratigraphy comments: No lithostratigraphic data reported. Collection from 22-24 m thick claystone, between 18 and 28 m above the base of the composite collection. This unit occupies the lower part of the Early Barremian succession. The top of the unit in well defined in all sections and represented by a SG. The SG is a distinctive half-meter glauconite layer, which was considered to represent the Hauterivian-Barremian boundary (Baraboshkin et al., 2001). |
Lithology and environment
Primary lithology: | concretionary,pyritic,black lithified silty claystone |
Secondary lithology: | green lithified siltstone |
Includes fossils? | Y |
Includes fossils? | Y |
Lithology description: Rhythmic alteration of black silty claystones and light grey and greenish siltstones or fine sandstones. The claystone contains weathered pyrite and rare horizons of carbonate concretions. The beds are intensively bioturbated and occasionally contain thin layers of sandy tempestites. | |
Environment: | marine indet. |
Geology comments: No paleoenvironmental data reported. |
Taphonomy
Modes of preservation: | body,recrystallized,replaced with silica |
Size of fossils: | macrofossils |
Preservation of anatomical detail: | poor |
Collection methods and comments
Collection methods: | selective quarrying,surface (float),surface (in situ),field collection |
Reason for describing collection: | biostratigraphic analysis |
Collection method comments: Figured material is deposited in the Museum of the Earth of the Moscow State University, Russia (MSU); some material is also reposited in the Dept of Geology and Paleontology at the University of Hannover, Germany (SGPI). | |
Taxonomic list comments:Modern nomenclatural usage. Includes all faunal group. |
Metadata
Database number: | 57132 | ||
Authorizer: | A. Hendy | Enterer: | A. Hendy |
Modifier: | A. Hendy | Research group: | marine invertebrate |
Created: | 2005-12-03 09:50:43 | Last modified: | 2013-11-25 13:37:23 |
Access level: | the public | Released: | 2005-12-03 09:50:43 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
15436. | E. J. Baraboshkin and J. Mutterlose. 2004. Correlation of the Barremian belemnite successions of northwest Europe and the Ulyanovsk Saratov area (Russian Platform). Acta Geologica Polonica 54(4):499-510 [A. Miller/A. Hendy/A. Hendy] |