District of Mackenzie Bathyurus nevadensis zone (Ordovician of Canada)

Where: Northwest Territories, Canada (61.3° N, 125.4° W: paleocoordinates 5.2° N, 60.2° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Bathyurus nevadensis trilobite zone, Sunblood Formation, Chazyan (470.0 - 457.3 Ma)

• formation-level stratigraphic resolution

Environment/lithology: lithified, gray, sandy limestone

• Environmental and Tectonic Setting calls by S.M. Holland
• medium to dark gray, microcrystalline to finely crystalline limestones which are generally resistantl. In a number of localities, the highest Sunblood is marked by an arenaceous interval.

Size class: macrofossils

Preservation: replaced with silica

Collection methods: bulk, chemical,

Primary reference: R. Ludvigsen. 1979. A trilobite zonation of Middle Ordovician rocks, southwestern District of Mackenzie. Geological Survey of Canada Bulletin 312:1-98 [S. Holland/S. Holland/J. Ju]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 24617: authorized by Steven Holland, entered by Steven Holland on 12.08.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Trilobita
 Proetida - Bathyuridae
Bathyurus angustus, Bathyurus nevadensis
Bathyurus angustus Ross 1970 trilobite
Bathyurus nevadensis Ross and Barnes 1967 trilobite
 Asaphida - Asaphidae
Isoteloides sp.
Isoteloides sp. Raymond 1910 trilobite