Dzhagadzur, Bed 23, Transcaucasia: Wordian, Armenia
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Endothyridae
|
|||||||
|
Endothyra minima
|
|||||||
|
Pachyphloiidae
|
|||||||
|
Pachyphloia aff. ovata
Lange 1925
|
|||||||
|
Biseriamminidae
|
|||||||
|
Globivalvulina aff. cyprica
Reichel 1946
|
|||||||
|
Palaeotextulariidae
|
|||||||
|
Climacammina valvulinoides
Lange 1925
|
|||||||
|
Schwagerinidae
|
|||||||
|
Chusenella abichi
|
|||||||
|
Chusenella caucasica
|
|||||||
|
Chusenella sinensis
Sheng 1963
|
|||||||
|
Tetrataxidae
|
|||||||
|
Tetrataxis sp.
Ehrenberg 1854
|
|||||||
|
Rhynchonellata
- Athyridida
- Athyrididae
|
|||||||
|
Septospirigerella cf. baissalensis
Grunt 1965
|
|||||||
|
Rhynchonellata
- Orthida
- Schizophoriidae
|
|||||||
|
Orthotichia sp.
Hall and Clarke 1892
|
|||||||
|
Strophomenata
- Productida
- Productellidae
|
|||||||
|
Ogbinia dzhagrensis
Sarycheva 1965
|
|||||||
| see common names | |||||||
Geography
| Country: | Armenia |
| Coordinates: | 39.7° North, 45.2° East (view map) |
| Paleocoordinates: | 8.4° South, 41.4° East |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | small collection |
Time
| Period: | Permian | Epoch: | Guadalupian |
| Stage: | Wordian | 10 m.y. bin: | Permian 4 |
| Key time interval: | Wordian | ||
| Age range of interval: | 266.90000 - 264.28000 m.y. ago |
Stratigraphy
| Formation: | Arpa | ||||
| Local section: | Dzhadagzur | Local bed: | 23 | ||
| Local order: | top to bottom | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: 7 m thick.
Basal unit of the Midian stage of the Tethyan timescale. Kotlyar et al. (1989) identified two fusulinid zones, the lower Yangchienia thompsoni and the upper Chusenella abichi. In central Iran, Chusenella abichi occurs with Neoschwagerina margaritae (Leven, 1998), suggesting a Wordian age for the entire Arpa Formation. | |||||
Lithology and environment
| Primary lithology: | lithified "limestone" |
| Environment: | carbonate indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 97387 | ||
| Authorizer: | M. Clapham | Enterer: | M. Clapham |
| Modifier: | B. Allen | Research group: | marine invertebrate |
| Created: | 2010-07-24 18:16:08 | Last modified: | 2020-05-18 09:31:59 |
| Access level: | the public | Released: | 2010-07-24 18:16:08 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 31759. | G. V. Kotlyar, Y.u. D. Zakharov, G. S. Kropatcheva, G. P. Pronina, I. O. Chedija and V. I. Burago. 1989. Evolution of the latest Permian biota: Midian regional stage in the USSR 1-184 [M. Clapham/M. Clapham] |