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

Where: Yukon, Canada (68.2° N, 137.0° W: paleocoordinates 15.7° N, 47.6° W)

• coordinate based on political unit

• basin-level geographic resolution

When: Diplograptus zone, Road River Formation, Llandovery (443.4 - 433.4 Ma)

• "lower Lland."

Environment/lithology: marine; shale

• "dark graptolitic shale. basinal. eugeosyncline"

Size class: macrofossils

Primary reference: D. E. Jackson and A. C. Lenz. 1962. Zonation of Ordovician and Silurian graptolites of northern Yukon, Canada. AAPG Bulletin 46:30-45 [M. Uhen/J. Ju/M. Uhen]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 515: authorized by Jack Sepkoski, entered by Mike Sommers on 07.01.1999

Creative Commons license: CC BY (attribution)

Taxonomic list

• "D.E. Jackson and A.C. Lenz, 1962. Zonation of Ord and Sil graptolites of northern Yukon, Canada. AAPG Bull. 46:30-4[?]"
Show authors, comments, and common names
Pterobranchia
 Graptoloidea - Retiolitidae
Glyptograptus sp.
 Graptoloidea - Diplograptidae
Orthograptus sp., Diplograptus sp.
Orthograptus sp. Lapworth 1873 graptolite
Diplograptus sp. graptolite
Rhynchonellata
 Spiriferida - Delthyrididae
? Howellella sp.
? Howellella sp. Kozlowski 1946
originally entered as "? Howellela sp."
 Orthida - Dalmanellidae
Dalmanella sp.
Dalmanella sp. Hall and Clarke 1892