Loc. 90577, Mumm Peak Section: Dyeran, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Trilobita
- Redlichiida
- Laudoniidae
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Olenellus truncatooculatus
Fritz 1992
|
95 specimens | |||||||||
| recombined as Mummaspis truncatooculatus | ||||||||||
| 95 cephala | ||||||||||
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Laudonia bispinata
Harrington 1956
|
10 specimens | |||||||||
| 10 cephala | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Canada | State/province: | Alberta |
| Coordinates: | 53.2° North, 119.1° West (view map) | ||
| Paleocoordinates: | 3.2° South, 79.4° West | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Cambrian | Epoch: | Series 2 |
| 10 m.y. bin: | Cambrian 2-3 | ||
| *Period: | Early/Lower Cambrian - Middle Cambrian | *Epoch: | Caerfai |
| *International age/stage: | Early/Lower Lenian - Middle Lenian | ||
| Key time interval: | Dyeran | Trilobite zone: | Bonnia-Olenellus |
| Age range of interval: | 514.80000 - 511.00000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Mural | ||||
| Local section: | Mumm Peak | Local bed: | 138.1 m | ||
| Local order: | bottom to top | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: 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 14.2m to 14.5m above the base of the middle mudstone member. NOTE: The Tah Formation has been renamed the Mural Formation by Burling. AGE: Waucoban; refined by A. Hendy (6/2009) on the basis of biostratigraphic data (= Bonnia-Olenellus zone). | |||||
Lithology and environment
| Primary lithology: | lithified siltstone |
| Environment: | marine indet. |
Taphonomy
| Modes of preservation: | body |
| Size of fossils: | macrofossils,mesofossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: 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. | |
Metadata
| Database number: | 10882 | ||
| Authorizer: | M. Patzkowsky | Enterer: | P. Borkow |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2001-06-29 08:45:51 | Last modified: | 2010-05-26 21:05:56 |
| Access level: | the public | Released: | 2001-06-29 08:45:51 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 4031. | 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] |