Also known as . Section, Mural Fm, Canada - Fritz 1992

Where: British Columbia, Canada (50.3° N, 119.3° W: paleocoordinates 5.5° N, 91.0° W)

• coordinate based on political unit

• outcrop-level geographic resolution

When: Nevadella zone, middle Member (Mural Tah Formation), Lenian (516.0 - 510.2 Ma)

• Trilobites from below the upper Nevadella Zone and lower Bonnia-Olenellus boundary were found to have a restricted diversity, while those above are markedly different and exhibit diverse forms. The possible cause is a disconformity or a disconformity with an erosionally-erased biomere boundary. The boundary between the Nevadella and Bonnia-Olenellus zones is within the interval 4.1m below to 6.2m above the base of the middle mudstone member. NOTE: The Tah Formation has been renamed Mural Formation by Burling.

• group of beds-level stratigraphic resolution

Environment/lithology: lithified limestone

Size class: macrofossils

Collection methods: Lithology and age of the sections were restudied by Fritz and Mountjoy in 1975 and additional collecting by Fritz and Mountjoy in 1971 and 1973 at Mumm Peak, Cinnamon Peak-Whitehorn Mountain, and Walcott's nearby sections are integrated into the study.

Primary reference: W. H. Fritz. 1992. Walcott's Lower Cambrian Olenellid trilobite collection 61k, Mount Robson Area, Canadian Rocky Mountains. Geological Survey of Canada Bulletin 432 (432)1-66 [M. Patzkowsky/P. Borkow/P. Borkow]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 10854: authorized by Mark Patzkowsky, entered by Phil Borkow on 28.06.2001

Creative Commons license: CC BY (attribution)