Where: Asker, Norway (59.9° N, 10.5° E: paleocoordinates 31.8° S, 9.7° W)

• coordinate estimated from map

When: Nakkholmen Formation, Oandu to Oandu (453.0 - 450.5 Ma)

• "Upper Chasmops Shale", in Siveter (1976)

Environment/lithology: marine; shale

Size classes: macrofossils, mesofossils

Primary reference: D. J. Siveter. 1977. The Middle Ordovician of the Oslo Region, Norway, 27. Trilobites of the Family Calymenidae. Norsk Geologisk Tidsskrift 56:335-396 [B. Kröger/B. Kröger/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 167267: authorized by Björn Kröger, entered by Björn Kröger on 10.03.2015

Creative Commons license: CC BY (attribution)