Yinshanpo KC262a, Qingyan (Triassic to of China)

Where: Guizhou, China (26.3° N, 106.7° E: paleocoordinates 13.3° N, 95.1° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Qingyan Formation, Pelsonian to Pelsonian (247.2 - 242.0 Ma)

• Bed 4 (units KC 259-262) is 80 m thick. About 200 m above base of Qingyan Formation.

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified, gray, green, yellow shale and lithified, gray marl

• Evaporative basin in Sichuan and north Guizhou separated from open marine to south in Yunnan and Guangxi by biohermal belt, located just north of Qingyan. The area near Qingyan was a prebiohermal facies. (Apparently fore-reef or something equivalent, located on the slope?)
• Qingyan Formation consists mainly of gray to yellowish-green noncalcareous shale, pale-to dark-gray marl, calcareous shale, and argillaceous limestone, usually thin-bedded. Most of the fossils are collected from the shale and marl.

Size class: macrofossils

Primary reference: H.-F. Yin and E. L. Yochelson. 1983. Middle Triassic Gastropoda from Qingyan, Guizhou Province, China: 3 - Euomphalacea and Loxonematacea. Journal of Paleontology 57(5):1098-1127 [D. Bottjer/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 121732: authorized by Matthew Clapham, entered by Matthew Clapham on 11.12.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Gastropoda
 Murchisoniina - Zygopleuridae
Zygopleura arctecostata M√ľnster 1841 snail