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Wujiajiania sutherlandi fauna (Elvinia biozone, Paibian stage, Furongian series—“Upper” Cambrian) from the Emigrant Formation, Nevada

Published online by Cambridge University Press:  14 July 2015

Frederick A. Sundberg ,
Richard Kurkewicz  and
Dustin L. Rooks
Frederick A. Sundberg
Affiliation:
1Show Low High School, 500 E. Old Linden Rd., Show Low, Arizona 85901,
Richard Kurkewicz
Affiliation:
2Western Trilobite Association, 644 Castro Street, San Francisco, California 94114,
Dustin L. Rooks
Affiliation:
3Grand Staircase-Escalante National Monument, Escalante Field Station, PO Box 225, Escalante, Utah 84726,
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Extract

Fossils from the Emigrant Formation of Nevada are rare despite the geologic time (uppermost Lower Cambrian to Lower Ordovician) represented by the 700 m thick sequence of deeper water, fine-grained clastics and carbonates. This report documents trilobites from the Elvinia Biozone from this formation in the Goldfield Hills, Nevada. Previously, trilobites and inarticulate brachiopods from the Emigrant Formation have been reported from the lowermost and uppermost portions. in the lower portion, trilobites from the Olenellus Biozone (Dyeran Stage, “Lower” Cambrian) occur in the basal few meters, and are overlain by 15 m of mudstones containing the Eokochaspis nodosa, Amecephalus arrojosensis, and Oryctocephalus indicus biozones (Lin and Knox, 2001; Sundberg and McCollum, 2003) of the lower Delamaran Stage (“Middle” Cambrian, Fig. 1). Collections above the lower mudstones include the Glossopleura Biozone of the Delamaran Stage, Ehmaniella? Biozone of the Topazan Stage, and the Ptychagnostus atavus and Cedaria selwyni biozones of the Marjuman Stage (unpublished data). the only other fossil remains that have been reported include a possible Elvinia Biozone fossil from the middle portion of the formation (McCollum and Sundberg, 2000) and Saukia Biozone fossils from the upper portion of the formation (Albers and Stewart, 1972; unpublished data). Lower Ordovician conodonts have also been found in the upper portion of the formation (M. Miller, personal commun. to L. McCollum, 2003).

Type
Paleontological Notes
Information
Journal of Paleontology , Volume 81 , Issue 4 , July 2007 , pp. 794 - 796
Copyright
Copyright © The Paleontological Society 

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