Where: Northwest Territories, Canada (61.6° N, 125.7° W: paleocoordinates 6.8° N, 58.0° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Road River Formation, Shermanian to Shermanian (457.3 - 449.6 Ma)
• formation-level stratigraphic resolution
Environment/lithology: deep subtidal; phosphatic, black, argillaceous limestone
Size class: macrofossils
Preservation: mold/impression, replaced with other
Primary reference: R. Ludvigsen. 1975. Ordovician formations and faunas, southern Mackenzie Mountains. Canadian Journal of Earth Sciences 12:663-697 [S. Holland/T. Hanson/J. Ju]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 25333: authorized by Steven Holland, entered by Tori Hanson on 09.09.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
unclassified | |
Pterobranchia | |
Orthograptus spp. Lapworth 1873 graptolite
Diplograptus spp. graptolite | |
Trilobita | |
Triarthrus sp. Green 1832 trilobite | |
? Cryptolithus sp. Green 1832 trilobite | |
? Robergia sp. Wiman 1905 trilobite |