Bjørkasholmen Penninsula (Ordovician of Norway)

Where: Oslo-Asker, Norway (59.8° N, 10.5° E: paleocoordinates 38.2° S, 16.4° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Apatokephalus serratus trilobite zone, Bjørkasholmen Formation, Varangu (485.4 - 484.5 Ma)

• Originally given as Ceratopyge. Overlies Incipiens Limestone and Alum Shale

• formation-level stratigraphic resolution

Environment/lithology: lithified, glauconitic, gypsiferous limestone

• ENVIRONMENT: Not described in text.
• The limestone is glauconitic and contains arrow-like pseudomorphs of gypsum.

Size class: macrofossils

Collection methods: surface (in situ),

• COLLECTORS: Multiple collectors. REPOSITORY: Paleontological Museum. Oslo, Norway (PMO).

Primary reference: J. F. Bockelie. 1982. The Ordovician of Oslo-Asker. In D. L. Brunton, S. H. Williams (eds.), Field Excursion Guide. IV. International Symposium on the ordovician System 4:106-121 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 185891: authorized by Pete Wagner, entered by Pete Wagner on 23.05.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to orthoceratoid described in text. NOMENCLATURE: Authoritative publication, with species resolution data, and modern nomenclature.
 Olenida - Eulomidae
Euloma ornatum trilobite
 Asaphida - Asaphidae
Niobe insignis trilobite
 Asaphida - Ceratopygidae
 Asaphida - Nileidae
Symphysurus angustatus Sars and Boeck 1838 trilobite
 Orthida - Archaeorthidae
 Prioniodontida - Oistodontidae
Rossodus manitouensis Repetski and Ethington 1983 conodont