Also known as Reef 3181

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 (515.3 - 511.2 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 and Mihaela Krause

Creative Commons license: CC BY (attribution)