Where: Millard County, Utah (38.8° N, 113.7° W: paleocoordinates 6.4° S, 85.3° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Fillmore Formation, Stairsian (485.4 - 478.6 Ma)

Environment/lithology: shallow subtidal; lithified, cherty/siliceous lime mudstone and grainstone

Size class: macrofossils

Preservation: replaced with silica

Collected by J. M. Adrain, S. R. Westrop in the 1990s; reposited in the SUI

Collection methods: chemical,

Primary reference: J. M. Adrain and S. R. Westrop. 2007. Bearriverops, a new Lower Ordovician trilobite genus from the Great Basin, western USA, and classification of the family Dimeropygidae. Canadian Journal of Earth Sciences 44:337-366 [M. Hopkins/M. Hopkins]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 106428: authorized by Melanie Hopkins, entered by Melanie Hopkins on 15.03.2011

Creative Commons license: CC BY (attribution)