Where: Esmeralda County, Nevada (37.5° N, 117.5° W: paleocoordinates 1.1° S, 95.1° W)
• outcrop-level geographic resolution
When: Bonnia-Olenellus trilobite zone, Harkless Formation, Dyeran (516.0 - 513.0 Ma)
• Correlated with the Saline Valley Formation of eastern California. Laterally adjacent to and interfingering with the biostromal limestone is an archaeocyathan-rich biosparite indicating rewroking and deposition as lenses along side the bistromal growths. The siltstones/shales above and below the biostrome are lacking archaeocyathan. AGE: Waucoban; refined by A. Hendy (6/2009) on the basis of biostratigraphic data (= Bonnia-Olenellus zone).
•Bonnia-Olenellus is Dyeran (upper Waucoban).
• formation-level stratigraphic resolution
Environment/lithology: reef, buildup or bioherm; lithified sandstone and shale
Size classes: macrofossils, mesofossils
Preservation: replaced with calcite, replaced with phosphate
Collection methods: The taxonomic list does not include possible chancellorid spines found in the biostromal limestone, but does include unidentified trilobite fragments, echinoderm plates, and bivalves.
Primary reference: M. Savarese and P. W. Signor. 1989. New Archaeocyathan occurrences in the Upper Harkless Formation (Lower Cabrian of western Nevada). Journal of Paleontology 63(5):539-549 [M. Patzkowsky/P. Borkow/J. Alroy] more details
Purpose of describing collection: taxonomic analysis
PaleoDB collection 7787: authorized by Mark Patzkowsky, entered by Phil Borkow on 02.06.2000, edited by Alex Lin