Where: Franklin County, Idaho (42.1° N, 111.6° W: paleocoordinates 7.3° S, 81.8° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Rossaspis superciliosa trilobite zone, Garden City Formation, Stairsian (485.4 - 478.6 Ma)

• "Zone F" of Ross (1951) and Hintze (1951, 1952).

Environment/lithology: shallow subtidal; lithified, bioturbated lime mudstone and lithified, shelly/skeletal packstone

Size classes: macrofossils, mesofossils

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, N. E. B. McAdams, and S. R. Westrop. 2009. Trilobite biostratigraphy and revised bases of the Tulean and Blackhillsian Stages of the Ibexian Series, Lower Ordovician, western United States. Memoirs of the Association of Australasian Palaeontologists 37:541-610 [P. Wagner/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 228261: authorized by Melanie Hopkins, entered by Melanie Hopkins on 25.11.2022

Creative Commons license: CC BY (attribution)