Locality 8, Clarkston Mountains, Zone "D" (Ordovician of the United States)

Where: Box Elder County, Utah (41.9° N, 112.1° W: paleocoordinates 7.0° S, 82.0° W)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Leiostegium-Kainella trilobite zone, Garden City Formation, Stairsian (485.4 - 478.6 Ma)

• 13 foot interval beginning at 602 feet above base of formation.

Environment/lithology: shallow subtidal; lithified, massive, coarse-grained limestone

• "Coarse-grained, fossiliferous, crystalline limestone."

Size class: macrofossils

Collected by R. J. Ross, Jr. in 1946-1947; reposited in the YPM

Primary reference: R. J., J.r. Ross. 1951. Stratigraphy of the Garden City Formation in northeastern Utah, and its trilobite faunas. Yale Peabody Museum of Natural History Bulletin 6:1-161 [S. Finnegan/S. Finnegan/P. Wagner]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 103892: authorized by Melanie Hopkins, entered by Melanie Hopkins on 03.02.2011

Creative Commons license: CC BY (attribution)

Taxonomic list

Trilobita
 Corynexochida - Leiostegiidae
"Leiostegium cf. manitouense" = Leiostegium manitouensis
"Leiostegium cf. manitouense" = Leiostegium manitouensis Walcott 1925 trilobite