Where: Liaoning, China (41.6° N, 120.9° E: paleocoordinates 44.3° N, 122.7° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Jianshangou Member (Yixian Formation), Late/Upper Barremian to Late/Upper Barremian (130.0 - 122.5 Ma)

• several meters above beds bearing Sinosauropteryx and Confuciusornis; authors use "Chaomidianzi Formation" but this is part of Yixian.

•

•"age of 129.7 ± 0.5 Ma for a basaltic lava from the bottom of the Yixian Formation and an age of 122.1 ± 0.3 Ma for a tuff from the lowermost part of the overlying Jiufotang Formation" (Chang et al. 2009)

• group of beds-level stratigraphic resolution

Environment/lithology: lacustrine; siltstone and black, gray, silty mudstone

Size class: macrofossils

Preservation: adpression, soft parts

Collection methods: quarrying,

Primary reference: X. Wang, Y. Wang, Y. Wang, X. Xu, Z. Tang, F. Zhang, and Y. Hu. 1998. Stratigraphic sequence and vertebrate-bearing beds of the lower part of the Yixian Formation in Sihetun and neighboring area, western Liaoning, China. Vertebrata PalAsiatica 36(2):81-101 [M. Carrano/M. Carrano/M. Carrano]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 10761: authorized by Matthew Carrano, entered by Matthew Carrano on 19.06.2001

Creative Commons license: CC BY (attribution)