Also known as A 140
Where: Northwest Territories, Canada (61.6° N, 125.8° W: paleocoordinates 5.5° N, 59.9° W)
• coordinate stated in text
• outcrop-level geographic resolution
When: Esbataottine Formation, Chazyan (470.0 - 457.3 Ma)
• formation-level stratigraphic resolution
Environment/lithology: deep subtidal; argillaceous, silty limestone
Size classes: macrofossils, microfossils
Preservation: replaced with silica
Primary reference: B. D. E. Chatterton and R. Ludvigsen. 1976. Silicified Middle Ordovician trilobites from the South Nahanni River Area, District of Mackenzie, Canada. Palaeontographica Abteilung A 154(1-3):1-106 [S. Holland/T. Hanson/T. Hanson]more details
Purpose of describing collection: biostratigraphic analysis
PaleoDB collection 25934: authorized by Steven Holland, entered by Tori Hanson on 28.09.2002
Creative Commons license: CC BY (attribution)
Taxonomic list
| Trilobita | |
|
Hemiarges turneri Chatterton and Ludvigsen 1976 trilobite
Amphilichas aff. aspratilis Bradley 1930 trilobite | |
|
Dolichoharpes aff. reticulata Whittington 1949 trilobite | |
|
Failleana calva Chatterton and Ludvigsen 1976 trilobite | |
|
Nanillaenus aduncus Chatterton and Ludvigsen 1976 trilobite
Nanillaenus mackenziensis Chatterton and Ludvigsen 1976 trilobite
"Bumastus (Bumastoides) lenzi" = Bumastoides lenzi Chatterton and Ludvigsen 1976 trilobite | |
|
Remopleurides pattersoni Chatterton and Ludvigsen 1976 trilobite | |
|
Isotelus parvirugosus Chatterton and Ludvigsen 1976 trilobite | |
|
Calyptaulax callirachis Cooper 1953 trilobite | |
|
Cybeloides cimelia Chatterton and Ludvigsen 1976 trilobite | |
|
Acanthoparypha evitti Chatterton and Ludvigsen 1976 trilobite
Ceraurinella kingstoni Chatterton and Ludvigsen 1976 trilobite
Ceraurinella nahanniensis Chatterton and Ludvigsen 1976 trilobite | |
|
Apianurus parabarbatus Chatterton and Ludvigsen 1976 trilobite | |