UA locality RM 8, Milepost 212, Richardson Highway (Carboniferous of the United States)

Where: Alaska (63.3° N, 145.7° W: paleocoordinates 10.6° N, 65.0° W)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Moscovian (315.2 - 307.0 Ma)

• Atokan. Unnamed formation of blue-black calcareous and siliceous, silty mudstone.

• bed-level stratigraphic resolution

Environment/lithology: marine; lithified, black, blue, silty, calcareous mudstone

• Blue-black calcareous and siliceous, silty mudstone

Size class: macrofossils

Collected by R.C. Allison, G.C. Bond in 1969

• Repository: University of Alaska

Primary reference: C. K. Chamberlain. 1977. Carboniferous and Permian trilobites from Ellesmere Island and Alaska. Journal of Paleontology 51:758-771 [M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 132285: authorized by Matthew Clapham, entered by Matthew Clapham on 11.08.2012

Creative Commons license: CC BY (attribution)

Taxonomic list

 Proetida - Proetidae
Griffithides (Griffithides) majus n. sp. Chamberlain 1977 trilobite