Where: Eureka County, Nevada (39.4° N, 116.0° W: paleocoordinates 2.2° S, 91.2° W)

• coordinate based on nearby landmark

When: Bolaspidella trilobite zone, Secret Canyon Formation, Marjumian (504.5 - 497.0 Ma)

• group of beds-level stratigraphic resolution

Environment/lithology: marine; lithified mudstone

Preservation: mold/impression

Collected by James Sprinkle in 1968; reposited in the MCZ, USNM

Collection methods: surface (float),

Primary reference: J. Sprinkle. 1973. Morphology and evolution of blastozoan echinoderms. Harvard University Museum of Comparative Zoology, Special Publication 1-283 [G. Webster/G. Webster/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 90674: authorized by Alex Lin, entered by Alex Lin on 12.08.2009

Creative Commons license: CC BY (attribution)