Where: Alaska (65.2° N, 141.3° W: paleocoordinates 12.6° N, 56.7° W)

When: Road River Formation, Llanvirn (468.0 - 458.4 Ma)

• 2-3 feet above Cambrian limestone.

Environment/lithology: offshore; lithified, cherty/siliceous shale

Size class: macrofossils

Collected by Churkin in 1963

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: biostratigraphic analysis

PaleoDB collection 114974: authorized by Arnold Miller, entered by Sarah Kolbe on 26.08.2011

Creative Commons license: CC BY (attribution)