locality 49 (3), Chengtu-Sian highway (Jurassic of China)

Also known as Kwangyuan, Kuangyuan, Guangyuan

Where: Sichuan, China (32.5° N, 105.8° E: paleocoordinates 33.2° N, 109.8° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Lower Member (Shaximiao Formation), Bajocian (170.3 - 168.3 Ma)

• middle part of "Kuangyuan Series"

•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).

• bed-level stratigraphic resolution

Environment/lithology: terrestrial; gray, green sandstone

• "greenish gray sandstone...traces of mud cracks"

Size classes: macrofossils, mesofossils

Preservation: trace

Collected by Young in 1941

Collection methods: quarrying, surface (in situ),

Primary reference: C.-C. Young. 1942. Fossil vertebrates from Kuangyuan, N. Szechuan, China. Bulletin of the Geological Society of China 22(-34):293-309 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 47078: authorized by Matthew Carrano, entered by Matthew Carrano on 07.02.2005

Creative Commons license: CC BY (attribution)

Taxonomic list

Bivalvia
 Unionida - Unionidae
Unio sp. Philipsson 1788 freshwater mussel
Reptilia
 Crocodylia -
Kuangyuanpus szechuanensis n. gen. n. sp. Young 1943 crocodilian
footprints
 Theropoda -
Chienkosaurus ceratosauroides Young 1942 tetanuran theropod
IVPP V.190