Where: Box Elder County, Utah (41.5° N, 111.9° W: paleocoordinates 8.3° S, 76.8° W)

• coordinate estimated from map

• local area-level geographic resolution

When: M trilobite zone, Swan Peak Formation, Chazyan (470.0 - 457.3 Ma)

• 159 foot interval beginning at base of formation

• group of beds-level stratigraphic resolution

Environment/lithology: shallow subtidal; lithified, green shale and lithified, brown, white quartzite

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 103915: authorized by Melanie Hopkins, entered by Melanie Hopkins on 03.02.2011, edited by Pete Wagner

Creative Commons license: CC BY (attribution)