ammonites
Matan M40, Heshan (Permian of China)

Where: Guangxi, China (23.8° N, 108.9° E: paleocoordinates 4.4° N, 99.6° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Upper Member (Heshan Formation), Changhsingian (254.0 - 252.3 Ma)

• Lower Changhsingian

• group of beds-level stratigraphic resolution

Environment/lithology: lithified, gray, cherty/siliceous limestone

• Dark-grey, medium-bedded siliceous striped limestone and chert nodules and bioclastic limestones intercalated with three coal layers

Size class: macrofossils

Preservation: replaced with silica

Primary reference: H. -Z. Pan and D. H. Erwin. 2002. Gastropods from the Permian of Guangxi and Yunnan Provinces, South China. Journal of Paleontology Memoir 56:1-49 [P. Wagner/P. Wagner/P. Wagner] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 56895: authorized by Pete Wagner, entered by Pete Wagner on 28.11.2005, edited by Matthew Clapham