Vollen Road Section. 1.5 m. (Ordovician of Norway)

Where: Oslo, Norway (59.9° N, 10.8° E: paleocoordinates 32.6° S, 9.9° W)

When: Diplograptus foliaceus graptolite zone, Upper Member (Arnestad Formation), Keila (460.9 - 455.8 Ma)

• The Arnestad Formation overlies the nodular limestones of the Vollen Formation and is overlain by the nodular limestone dominated Frognerkilen Formation.

• group of beds-level stratigraphic resolution

Environment/lithology: nodular limestone

• The Arnestad Formation (Figs 2–5) is a bioturbated, dark grey, fissile, siliciclastic mudstone with intercalated, thin beds or nodular horizons of calcareous mudstone and wackestone.

Size class: macrofossils

Primary reference: J. Hansen and D. A. T. Harper. 2008. The late Sandbian – earliest Katian (Ordovician) brachiopod immigration and its influence on the brachiopod fauna in the Oslo Region, Norway. Lethaia 41(1):25-35 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 186394: authorized by Pete Wagner, entered by Pete Wagner on 21.06.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

 Strophomenida - Sowerbyellidae
 Strophomenida - Leptestiidae
 Strophomenida - Strophomenidae
Oslomena osloensis Spjeldnaes 1957