Where: Utah (39.2° N, 113.5° W: paleocoordinates 4.2° S, 91.9° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Lejopyge calva zone, Marjum and Weeks Formation, Menevian (504.5 - 499.5 Ma)

• The Lejopyge calva ""Zone"" described in this article is actually considered to be a subzone of the upper Bolaspidella Zone or comperable to the Lejopyge laevigata Zone.

• group of beds-level stratigraphic resolution

Environment/lithology: deep subtidal ramp; lithified lime mudstone and lithified packstone

Collection methods: chemical,

• Only trilobites listed in depth.

Primary reference: R. A. Robison. 1999. Lithology and faunas of the Lejopyge calva Zone. Laurentia 99: V fields conference of the Cambrian Stage Subdivision Working Group, International Subcomission on Cambrian Stratigraphy 21-21 [M. Patzkowsky/P. Borkow/Z. Krug]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 10572: authorized by Mark Patzkowsky, entered by Phil Borkow on 24.05.2001

Creative Commons license: CC BY (attribution)