Zhnongxian county grain distribution center: Bathonian - Callovian, China
collected by Yang & Li 1978
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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Mamenchisaurus hochuanensis
Chao 1965
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1 individual | ||||||
| see common names | |||||||
Geography
| Country: | China | State/province: | Sichuan | County: | Zhongxian |
| Coordinates: | 28.8° North, 104.1° East (view map) | ||||
| Paleocoordinates: | 28.7° North, 109.1° East | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Altitude: | 459 meters | ||||
| Geographic resolution: | small collection |
Stratigraphy
| Geological group: | Chongqing | Formation: | Shaximiao | Member: | Upper |
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: Several radiometric ages have been reported for the Shaximiao Formation, including 167 Ma or 172 Ma (Zong and Shi, 1997), 167–172 Ma or 178–169 Ma (Gou et al., 2000), 163±3 Ma (Li et al., 2010), 160±4 Ma (Luo et al., 2014), 158±7 Ma (Qian et al., 2016), and 159±2 Ma (Wang et al., 2018). However, more recent studies suggest an older age; Dai et al. 2022 reported a maximum depositional age for the bone-bearing layers of the lower member of the Shaximiao formation to be Bjaocan. Zhou et al. 2022 also supported a late Middle Jurassic age for the Shaximiao Formation (Bathonian-Callovian). | |||||
Lithology and environment
| Primary lithology: | not reported |
| Environment: | terrestrial indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils |
| Associated major elements: | all |
| Fragmentation: | frequent |
| Temporal resolution: | snapshot |
Collection methods and comments
| Collection methods: | surface (in situ),mechanical,field collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Collectors: | Yang & Li | Collection dates: | 1978 |
Metadata
| Database number: | 28231 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | G. Varnham | Research group: | vertebrate |
| Created: | 2003-01-31 10:05:28 | Last modified: | 2022-05-06 03:44:14 |
| Access level: | the public | Released: | 2003-01-31 10:05:28 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 17258. | ETE | Z. Dong, S. Zhou, and H. Zhang. 1983. [Dinosaurs from the Jurassic of Sichuan]. Palaeontologica Sinica, New Series C, Whole Number 162(23):1-136 [M. Carrano/M. Carrano] |
Secondary references:
| 13360 | ETE | Z. Dong. 1992. Dinosaurian Faunas of China. China Ocean Press, Beijing 1-188 [M. Carrano/M. Carrano/M. Carrano] |