Collection NJ320, Dawangou, northwestern Tarim Basin: Llanvirn, China
collected 1987
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Ptychopariida
- Shumardiidae
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Tarimella bituberculata
Zhang 1979
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2 specimens | ||||||
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Trilobita
- Trinucleida
- Raphiophoridae
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Mendolaspis paradoidyx
Zhang 1981
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3 specimens | ||||||
| see common names | |||||||
Geography
| Country: | China | State/province: | Xinjiang | County: | Kalpin |
| Coordinates: | 40.6° North, 79.5° East (view map) | ||||
| Paleocoordinates: | 30.6° South, 118.1° East | ||||
| Basis of coordinate: | estimated from map | ||||
| Geographic resolution: | outcrop |
Time
| Period: | Ordovician | Epoch: | Middle Ordovician |
| 10 m.y. bin: | Ordovician 2-3 | ||
| Key time interval: | Llanvirn | Graptolite zone: | Pterograptus elegans |
| Age range of interval: | 468.40000 - 458.40000 m.y. ago |
Stratigraphy
Lithology and environment
| Primary lithology: | black lithified mudstone |
| Secondary lithology: | lithified lime mudstone |
| Includes fossils? | Y |
| Lithology description: Bed from 3.5 m section of black shales intercalated with thin-bedded calcilutites | |
| Environment: | basinal (siliciclastic) |
| Geology comments: deposited under stagnant and restricted circulation environment in outer shelf basin | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | surface (in situ),mechanical,survey of museum collection |
| Reason for describing collection: | taxonomic analysis |
| Museum repositories: | NIGPAS | Collection dates: | 1987 |
| Collection method comments: Collection made as part of an extensive field investigation of the periphery of the Tarim Basin by geologists of the Nanjing Institute of Geology and Palaeontology, Academia Sinica, and the 05 Project Administration, Bureau of Petroleum Geology of Southwest China. | |
Metadata
| Database number: | 188329 | ||
| Authorizer: | M. Hopkins | Enterer: | M. Hopkins |
| Modifier: | M. Hopkins | Research group: | marine invertebrate |
| Created: | 2017-08-29 14:21:42 | Last modified: | 2017-08-29 16:06:55 |
| Access level: | the public | Released: | 2017-08-29 14:21:42 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 62426. | Z. Zhou, G. Yin, and Z. Zhou. 2014. Ordovician (Darriwilian-early Katian) trilobite faunas of northwestern Tarim, Xinjiang, China. Memoirs of the Association of Australasian Palaeontologists 46:1-142 [M. Hopkins/M. Hopkins] |