List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Reptilia
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Sauropoda indet.
Marsh 1878
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1 individual | |||||||||
| (1 measurement) | ||||||||||
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= Omeisaurus junghsiensis n. gen., n. sp.
Young 1939
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Young 1939 | |||||||||
| see common names | ||||||||||
Geography
| Country: | China | State/province: | Sichuan | County: | Rongxian |
| Coordinates: | 29.5° North, 104.4° East (view map) | ||||
| Paleocoordinates: | 29.4° North, 109.1° East | ||||
| Basis of coordinate: | based on nearby landmark | ||||
| Geographic resolution: | small collection |
Stratigraphy
| Geological group: | Chongqing | Formation: | Shaximiao | Member: | Daanzhai |
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: 200 m above Tzeluting (Tzeliuching) Fm.
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: | gray,green sandstone |
| Includes fossils? | Y |
| Lithology description: "greenish gray sandstone" | |
| Environment: | fluvial-lacustrine indet. |
Taphonomy
| Modes of preservation: | body |
| Degree of concentration: | dispersed |
| Size of fossils: | macrofossils |
| Spatial orientation: | random |
| Preservation of anatomical detail: | medium |
| Associated major elements: | all |
| Fragmentation: | frequent |
| Encrustation: | none |
| Temporal resolution: | snapshot |
| Spatial resolution: | parautochthonous |
Collection methods and comments
| Collection methods: | selective quarrying,mechanical,field collection | ||
| Reason for describing collection: | taxonomic analysis | ||
| Museum repositories: | IVPP | ||
| Collectors: | C. L. Camp & C.-C. Young | Collection dates: | 1936-1974 |
Metadata
| Also known as: | Xiguashan, Dongmenwai, Rongxian | ||
| Database number: | 47071 | ||
| Authorizer: | M. Carrano | Enterer: | M. Carrano |
| Modifier: | M. Carrano | Research group: | vertebrate |
| Created: | 2005-02-07 06:45:45 | Last modified: | 2022-10-11 14:08:05 |
| Access level: | the public | Released: | 2005-02-07 06:45:45 |
| Creative Commons license: | CC BY | ||
Reference information
Primary reference:
| 15531. | ETE | C.-C. Young. 1937. New Triassic and Cretaceous reptiles in China. Bulletin of the Geological Society of China 17(1):109-120 [M. Carrano/K. Maguire/M. Carrano] |
Secondary references:
| 36736 | ETE | Z. Dong. 1998. On Asiatic sauropods and their phylogenetic relationships. In A. M. G. de Carvalho, A. M. Andrade, V. F. dos Santos, J. Cascalho, R. Taborda, (eds.), I Encontro Internacional sobre Paleobiologia dos Dinossáurios. Museu Nacional de História Natural, Lisboa 79-88 [M. Carrano/M. Carrano/M. Carrano] |
| 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] |
| 62944 | Q. He. 1984. Dinosaur finds. China Reconstructs 33(3):68-69 [M. Carrano/M. Carrano] | |
| 82845 | G. Peng, Y. Ye, Y. Gao, C. Shu, and S. Jiang. 2005. Zìgòng dìqū zhū luó jì kǒnglóng dòngwù qún [Jurassic Dinosaur Faunas in Zigong]. 1-236 [M. Carrano/M. Carrano] | |
| 52143 | C. -C. Young, M. N. Bien, and T. H. Mi. 1943. Some geologic problems of the Tsinling. Bulletin of the Geological Society of China 23(1–2):15-34 [M. Carrano/M. Carrano] | |
| 24258 | ETE | C.-C. Young. 1937. New vertebrate horizons in China. Bulletin of the Geological Society of China 17(3-4):269-287 [M. Carrano/M. Carrano] |
| 12538 | ETE | C.-C. Young. 1939. On a new Sauropoda, with notes on other fragmentary reptiles from Szechuan. Bulletin of the Geological Society of China 19(3):279-315 [M. Carrano/M. Carrano/M. Carrano] |