Mackenzie Mountains, Delorme Range, Broken Skull Fm. Hesperonomia Fauna (Ordovician to of Canada)

Where: Northwest Territories, Canada (62.8° N, 125.3° W: paleocoordinates 3.9° N, 61.1° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Hesperonomia zone, Broken Skull Formation, Canadian to Canadian (485.4 - 457.3 Ma)

• formation-level stratigraphic resolution

Environment/lithology: brown, silty, sandy limestone and brown, silty, sandy dolomite

• Environmental call by T. Hanson.
• Limestone or dolostone, craggy appearance, silty or sandy, dull brown weathering color.

Size class: macrofossils

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 25281: authorized by Steven Holland, entered by Tori Hanson on 06.09.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Strophomenata
 Billingsellida - Polytoechiidae
Tritoechia sp.
Tritoechia sp. Ulrich and Cooper 1936
Rhynchonellata
 Pentamerida - Tetralobulidae
Syntrophopsis sp.
 Orthida - Hesperonomiidae
Hesperonomia sp.
Hesperonomia sp. Ulrich and Cooper 1936
 Orthida - Finkelnburgiidae
Diparelasma sp.
Diparelasma sp. Ulrich and Cooper 1936