Where: Gansu, China (36.1° N, 106.8° E: paleocoordinates 24.3° S, 122.7° E)

• coordinate estimated from map

• local area-level geographic resolution

When: Nemagraptus gracilis graptolite zone, Chedao Formation, Sandbian (458.4 - 453.0 Ma)

• formation-level stratigraphic resolution

Environment/lithology: marine; lithified, shelly/skeletal, red lime mudstone

Size classes: mesofossils, microfossils

Collection methods: surface (in situ), mechanical

Primary reference: Z. Zhou and W. T. Dean. 1986. Ordovician trilobites from Chedao, Gansu Province, north-west China. Palaeontology 29(4):743-786 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 182202: authorized by Melanie Hopkins, entered by Melanie Hopkins on 13.10.2016

Creative Commons license: CC BY (attribution)