District of Mackenzie, Tetlit Creek Section Unit 20, Road River Formation (Silurian of Canada)

Where: Northwest Territories, Canada (66.7° N, 135.8° W)

• Paleocoordinates: 8.1° N, 91.0° W (Wright 2013)

• coordinate stated in text

• outcrop-level geographic resolution

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

• Collection from 1888-1891 feet above base.

• formation-level stratigraphic resolution

Environment/lithology: deep subtidal; black, gray shale

• "Shale and shaly argillite, some limy, dark bluish grey, brownish black, weathers dark grey, greyish black, recessive; rare pyrite; rare argillaceous limestone concretions."

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 25636: authorized by Steven Holland, entered by Tori Hanson on 19.09.2002

Creative Commons license: CC0 (CC0)

Taxonomic list

Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Cryptograptidae
Linograptus phillipsi
Linograptus phillipsi graptolite
Linograptus phillipsi multiramosus
 Graptoloidea - Monograptidae
"Monograptus bohemicus" = Bohemograptus bohemicus, Monograptus sp.
"Monograptus bohemicus" = Bohemograptus bohemicus Barrande 1850 graptolite
Monograptus sp. graptolite
 Graptoloidea -
"Monograptus cf. uncinatus" = Uncinatograptus uncinatus
"Monograptus cf. uncinatus" = Uncinatograptus uncinatus Tullberg 1883 graptolite
Monograptus cf. M. uncinatus orbatus