Kalvsjo Formation, Hadeland, Oslo region, Norway (Ordovician of Norway)

Where: Norway (60.3° N, 10.5° E: paleocoordinates 30.0° S, 9.4° W)

• coordinate estimated from map

• basin-level geographic resolution

When: Kalvsjo Formation, Late/Upper Ordovician (458.4 - 443.4 Ma)

Environment/lithology: reef, buildup or bioherm; lithified mudstone and lithified limestone

• flank or interbank facies off small carbonate mud mounds consisting of mudstones and siltstones interbedded with 5-10 cm thick calcitic limestone beds with calcarenites or occasionally calcic siltites.

Size class: macrofossils

Preservation: original calcite

Primary reference: J. F. Bockelie and P.I. Briskeby. 1980. The presence of a bothriocidarid (Echinoid) in the Ordovician of Norway. Norsk Geologisk Tidsskrift 60:89-91 [S. Holland/S. Holland/S. Holland]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 37808: authorized by Steven Holland, entered by Steven Holland on 24.03.2004

Creative Commons license: CC BY (attribution)

Taxonomic list

Echinoidea
 Bothriocidaroida -