Ostøya, Transitional beds (Ordovician to of Norway)

Where: Oslo Asker, Norway (59.9° N, 10.6° E: paleocoordinates 32.6° S, 10.0° W)

• coordinate estimated from map

When: Vollen & Elnes Formation, Uhaku to Uhaku (466.0 - 449.5 Ma)

• "Transitional beds Ampyx Limestone 4aβ und Lower Chasmops Shale 4bα", in Nikolaisen (1961)= Vollen Fm. & Elnes Fm.

Environment/lithology: marine; limestone and 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 41:279-310 [B. Kröger/B. Kröger]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 191104: authorized by Björn Kröger, entered by Björn Kröger on 10.01.2018

Creative Commons license: CC BY (attribution)

Taxonomic list

 Phacopida - Cheiruridae
Hemisphaerocoryphe sphaericus Esmark 1833 trilobite