District of Mackenzie, Sunblood Range (Z-211) (Ordovician of Canada)

Where: Northwest Territories, Canada (61.5° N, 125.7° W: paleocoordinates 5.4° N, 60.0° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Bathyurus granulosus trilobite zone, Sunblood Formation, Whiterockian (471.8 - 457.5 Ma)

• bed-level stratigraphic resolution

Environment/lithology: shallow subtidal; limestone

Size classes: macrofossils, mesofossils

Preservation: replaced with silica

Collected by Rolf Ludvigsen in 1971-1973; reposited in the GSC

Collection methods: chemical,

Primary reference: J. V. Tremblay and S. R. Westrop. 1991. Middle Ordovician (Whiterockian) trilobites from the Sunblood Formation, District of Mackenzie, Canada. Journal of Paleontology 65(5):801-824 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 25173: authorized by Steven Holland, entered by Tori Hanson on 31.08.2002, edited by Melanie Hopkins

Creative Commons license: CC BY (attribution)

Taxonomic list

 Phacopida - Cheiruridae
Ceraurinella nahanniensis Chatterton and Ludvigsen 1976 trilobite
 Proetida - Bathyuridae
Bathyurus granulosus Ludvigsen 1979 trilobite
 Asaphida - Asaphidae
Isotelus cf. harrisi Raymond 1905 trilobite
 Lichida - Lichidae
Amphilichas sp. Raymond 1905 trilobite