Richardson Mtns., Road River Fm. (Silurian of Canada)

Where: Yukon, Canada (68.2° N, 137.0° W)

• Paleocoordinates: 9.3° N, 90.1° W (Wright 2013)

• coordinate based on political unit

• basin-level geographic resolution

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

Environment/lithology: marine; shale

• "dark graptolitic shale. basinal. eugeosynclinal"

Size class: macrofossils

Primary reference: M. Churkin, Jr. and E. E. Brabb. 1965. Ordovician, Silurian, and Devonian biostratigraphy of east-central Alaska. Bulletin of the American Association of Petroleum Geologists 49(2):172-185 [A. Miller/S. Kolbe]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 540: authorized by Jack Sepkoski, entered by Mike Sommers on 12.01.1999

Creative Commons license: CC0 (CC0)

Taxonomic list

• "Jackson and Lenz, 1962. Churkin and Brabb, 1965"
Show authors, comments, and common names
Rhynchonellata
 Pentamerida - Subrianidae
Conchidium sp.
Conchidium sp. Oehlert 1887
 Spiriferida - Delthyrididae
Howellella sp.
Howellella sp. Kozlowski 1946
Pterobranchia
 Graptoloidea - Cryptograptidae
Linograptus sp.
Linograptus sp. graptolite
 Graptoloidea - Monograptidae
Monograptus sp.
Monograptus sp. graptolite
2 species