Roaring Springs, Bright Angel Canyon (Cambrian of the United States)

Also known as Originally Gateway Canyon Member, Muav Fm., western Grand Canyon, AZ

Where: Coconino County, Arizona (36.1° N, 112.1° W: paleocoordinates 5.0° S, 94.8° W)

• coordinate based on political unit

When: Bolaspidella trilobite zone, Gateway Canyon Member (Muav Limestone Formation), Marjumian (504.5 - 497.0 Ma)

• * "lower Bolaspidella zone or upper B-E zone"

•Originally St. David; should be Topazan.

• member-level stratigraphic resolution

Environment/lithology: offshore; limestone

• "mottled ls, offshore bank, BA3"
• Most of the Gateway Canyon member within Grand Canyon is represented by the mottled, aphanitic limestone facies, and it contains the easternmost deposits of this limestone in the Cambrian sequence.

Size class: macrofossils

Primary reference: C. E. Resser. 1945. Cambrian history of the Grand Canyon region. Part II. Cambrian fossils of the Grand Canyon. Publications of the Carnegie Institution 563:171-220 [P. Wagner/P. Wagner]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 158681: authorized by Pete Wagner, entered by Pete Wagner on 21.07.2014

Creative Commons license: CC BY (attribution)

Taxonomic list

 Corynexochida - Dorypygidae
Kootenia mckeei trilobite