Where: Ringerike, Norway (66.8° N, 13.5° E: paleocoordinates 22.3° S, 8.7° W)

• coordinate based on political unit

• local area-level geographic resolution

When: Kalvsjøen Formation, Rawtheyan (455.8 - 445.6 Ma)

• Tretaspis = 5a

• formation-level stratigraphic resolution

Environment/lithology: limestone

Size class: macrofossils

Primary reference: R. M. Owens. 1973. Ordovician Proetidae (Trilobita) from Scandinavia. Norsk Geologisk Tidsskrift 53:117-181 [P. Wagner/P. Wagner] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 73493: authorized by Pete Wagner, entered by Pete Wagner on 18.06.2007