Where: Asker, Norway (59.9° N, 10.5° E: paleocoordinates 31.8° S, 9.7° W)
• coordinate estimated from map
When: Diplograptus foliaceus graptolite zone, Arnestad Formation, Haljala to Haljala (460.9 - 455.8 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 191107: authorized by Björn Kröger, entered by Björn Kröger on 10.01.2018
Creative Commons license: CC BY (attribution)
Taxonomic list
Strophomenata | |
"Ptychoglyptus valdari" = Ptychoglyptus irregularis2
"Ptychoglyptus valdari" = Ptychoglyptus irregularis2 Reed 1940 | |
Trilobita | |
| |
Cyrtometopella tumula Nikolaisen 1961 trilobite |