Where: Xinjiang, China (45.7° N, 84.9° E: paleocoordinates 53.1° N, 64.5° E)

• coordinate stated in text

• outcrop-level geographic resolution

When: Baijiantan Formation, Carnian (237.0 - 228.0 Ma)

• Numerous fossils including insects, kazacharthrans, fishes, plants and sporopollen have been unearthed from the Baijiantan Formation of the Shendigou outcrop in Xinjiang. The sporopollen assemblage in the Baijiantan Formation is mostly inherited from that of the upper part of the Karamay Formation and the megaspore assemblage resembles that of the Upper Triassic Haojiagou Formation in the southern Junggar Basin, all indicating a Late Triassic age. The Baijiantan Formation is found in the northwestern Junggar Basin and can be correlated with the Huangshanjie-Haojiagou formations in the southern and eastern basin. The Huangshanjie and Haojiagou formations are considered to be Carnian and Norian–Rhaetian in age, separately. Therefore, the age of the Baijiantan Formation is probably Carnian–Rhaetian. Carnian according to Zheng et al. 2018.

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine - large; lithified mudstone

Size class: macrofossils

Preservation: adpression

Reposited in the NIGPAS

Primary reference: D. R. Zheng, S. C. Chang, H. Wang, Y. Fang, J. Wang, C. Q. Feng, G. W. Xie, E. A. Jarzembowski, H. C. Zhang and B. Wang. 2018. Middle-Late Triassic insect radiation revealed by diverse fossils and isotopic ages from China. Science Advances 4:eaat1380 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 196151: authorized by Matthew Clapham, entered by Matthew Clapham on 05.09.2018

Creative Commons license: CC BY (attribution)