Also known as Gasøya

Where: Baerum, Norway (59.9° N, 10.6° E: paleocoordinates 31.8° S, 9.7° W)

• coordinate estimated from map

When: Diplograptus foliaceus graptolite zone, Arnestad Formation, Haljala to Haljala (456.8 - 453.0 Ma)

• "Lower Chasmops Shale 4bα", in Nikolaisen (1961) = Arnestad Fm.

• formation-level stratigraphic resolution

Environment/lithology: marine; shale

Size classes: macrofossils, mesofossils

Primary reference: F. Nikolaisen. 1961. The Middle Ordovician of the Oslo Region, Norway 7. Trilobites of the suborder Cheirurina. Norsk Geologisk Tidsskrift 41(2-4):279-310 [B. Kröger/B. Kröger/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 191117: authorized by Björn Kröger, entered by Björn Kröger on 10.01.2018

Creative Commons license: CC BY (attribution)