Where: Alaska (66.5° N, 167.0° W: paleocoordinates 17.0° N, 37.5° W)

When: Port Clarence Limestone Formation, Ashgill (449.5 - 443.7 Ma)

• PJW: Dutro (in Ross et al. 1982) puts this in the Ashgill. The rock unit as subsequently be named the Port Clarence.

• formation-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Collected by Ormiston in 1969

Primary reference: A. R. Ormiston. 1978. Monorakos (Trilobita) from the Ordovician of the Seward Peninsula, Alaska. Journal of Paleontology 52(2):345-352 [A. Miller/S. Kolbe]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 100359: authorized by Arnold Miller, entered by Sarah Kolbe on 08.12.2010

Creative Commons license: CC BY (attribution)