Where: Esmeralda County, Nevada (37.7° N, 117.7° W: paleocoordinates 3.1° S, 96.8° W)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Fallotaspis zone, Montenegro Member (Campito Formation), Montezuman to Montezuman (520.0 - 516.0 Ma)

• 19m from the base of the section and 9m thick. Conceptually, the boundary for the Montezuman stage should be placed on the earliest trilobite occurrence, but this is a very difficult point to define in the field. The reference point for the base of the Montezuman stage is at the base of the abundance and range zone of an Eofallotaspis-like trlobite which is 15.4m above a quartzite selected as the top of the Andrews Mountains Member (315m below the top of the Campito Formation).

• group of beds-level stratigraphic resolution

Environment/lithology: transition zone or lower shoreface; lithified, silty shale and lithified, argillaceous sandstone

Collection methods: bulk,

Primary reference: J. S. Hollingsworth. 1999. A candidate position for the base of the Montezuman stage. Laurentia 99: V field conference of the Cambrian Stage Subdivision Working Group, International Subcomission on Cambrian Stratigraphy 34-37 [M. Patzkowsky/P. Borkow]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 10574: authorized by Mark Patzkowsky, entered by Phil Borkow on 24.05.2001

Creative Commons license: CC BY (attribution)