District of Mackenzie, Nahoni Range Section, Unit 1 Road River Formation (Silurian of Canada)

Where: Northwest Territories, Canada (65.5° N, 139.2° W: paleocoordinates 10.4° N, 47.3° W)

• coordinate stated in text

• outcrop-level geographic resolution

When: Road River Formation, Ludlow (427.4 - 423.0 Ma)

• Collection taken from 36 feet above base.

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal; black shale

• "Shale, non-limy, black, weathers black, lower beds recessive."

Size class: macrofossils

Collection methods: Monograptus nilssoni fauna.

Primary reference: B. S. Norford. 1963. Reconnaissance of the Ordovician and Silurian rocks of Northern Yukon Territory. Geological Survey of Canada Department of Mines and Technical Surveys, Paper 63(39):1-139 [S. Holland/T. Hanson/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 25530: authorized by Steven Holland, entered by Tori Hanson on 15.09.2002

Creative Commons license: CC BY (attribution)

Taxonomic list

Pterobranchia
 Graptoloidea - Monograptidae
Monograptus spp. graptolite
"Monograptus bohemicus" = Bohemograptus bohemicus Barrande 1850 graptolite