Chaotian Section, Dalong Formation, Uppermost Limestone, Bed D18: Changhsingian, China
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Goniatitida
- Paragastrioceratidae
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Pseudogastrioceras spp.
Spath 1936
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| see common names | |||||||
Geography
| Country: | China | State/province: | Sichuan |
| Coordinates: | 32.7° North, 105.9° East (view map) | ||
| Paleocoordinates: | 10.5° North, 91.5° East | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Permian | Epoch: | Lopingian |
| Stage: | Changhsingian | 10 m.y. bin: | Permian 4 |
| Key time interval: | Changhsingian | ||
| Age range of interval: | 254.14 - 251.902 m.y. ago |
Stratigraphy
| Formation: | Dalong | ||||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: "Pseudotirolites-Pleuronodoceras Zone and Rotodiscoceras Zone of the late Changhsingian" bed within a 2 m interval | |||||
Lithology and environment
| Primary lithology: | planar lamination,gray "limestone" |
| Lithology description: "uppermost (2 m thick) part of the formation comprises gray, micritic limestone rhythmically bedded in 5 cm with nodular surface... Thin layers of acidic tuff, less than 10 cm thick, occur at 8 horizons [separating the fossiliferous beds]" | |
| Environment: | carbonate indet. |
| Geology comments: entire section is mostly proximate "to a carbonate platform" but chert incalacations are from "a slightly deeper environment than platform" | |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | biostratigraphic analysis |
Metadata
| Also known as: | Mingyuexia Gorge | ||
| Database number: | 73835 | ||
| Authorizer: | J. Alroy | Enterer: | J. Alroy | Research group: | marine invertebrate |
| Created: | 2007-07-02 20:56:01 | Last modified: | 2007-07-02 23:56:01 |
| Access level: | the public | Released: | 2007-07-02 20:56:01 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 24748. | Y. Isozaki, J. Yao, T. Matsuda, H. Sakai, Z. Ji, N. Shimizu, N. Kobayashi, H. Kawahata, H. Nishi, M. Takano, and T. Kubo. 2004. Stratigraphy of the Middle-Upper Permian and Lowermost Triassic at Chaotian, Sichuan, China. Proceedings of the Japan Academy, Series B 80(1):10-16 [J. Alroy/J. Alroy/J. Alroy] |