Where: Chongqing, China (29.2° N, 105.9° E: paleocoordinates 29.5° N, 110.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Upper Member (Shaximiao Formation), Bathonian to Bathonian (168.3 - 163.5 Ma)

• middle of formation

•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, red sandstone

Size class: macrofossils

Preservation: mold/impression, trace

Collection methods: surface (in situ), peel or thin section,

Primary reference: L.-D. Xing, M. G. Lockley, W. Chen, G. D. Gierlinksi, J.-J. Li, W. S. Persons, M. Matsukawa, Y. Ye, M. K. Gingras and C.-W. Wang. 2013. Two theropod track assemblages from the Jurassic of Chongqing, China, and the Jurassic Stratigraphy of Sichuan Basin. Vertebrata PalAsiatica 51(2):107-130 [M. Carrano/M. Carrano]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 182647: authorized by Matthew Carrano, entered by Matthew Carrano on 16.11.2016

Creative Commons license: CC BY (attribution)