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Peraspis fauna, Road River Fm., Llanvirn (Ordovician of Canada)

Where: Yukon, Canada (62.8° N, 136.6° W: paleocoordinates 17.2° N, 76.5° W)

• coordinate based on political unit

When: Road River Formation, Llanvirn (466.0 - 460.9 Ma)

Environment/lithology: slope; black, argillaceous lime mudstone

• "black argillaceous lime mudstone and shales"

Size class: macrofossils

Primary reference: R. Ludvigsen. 1981. Biostratigraphy significance of Middle Ordovician trilobites from the Road River Formation, northern Cordillera. Geological Association of Canada Abstracts 6:A-36 [M. Uhen/J. Ju/J. Ju] more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 302: authorized by Jack Sepkoski, entered by Mike Sommers on 20.11.1998

Creative Commons license: CC BY (attribution)