Fauna x, Section AV5, Delorme Fm., Mackenzie Mts.: Wenlock, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Geography
| Country: | Canada | State/province: | Northwest Territories |
| Coordinates: | 62.4° North, 127.0° West (view map) | ||
| Paleocoordinates: | 1.0° North, 99.5° West (Wright 2013) | ||
| Basis of coordinate: | based on nearby landmark | ||
| Geographic resolution: | outcrop |
Time
| Period: | Silurian | Epoch: | Wenlock |
| 10 m.y. bin: | Silurian 2 | ||
| Key time interval: | Wenlock | ||
| Age range of interval: | 432.9 - 426.7 m.y. ago |
Stratigraphy
| Formation: | Delorme | ||||
| Stratigraphic resolution: | group of beds | ||||
| Stratigraphy comments: Zonation based on conodonts present in AV sections 1, 2, and 4. (AV 3 and DR sections correlated with these on basis of trilobite faunal assemblages. I'm assuming AV5 can be correlated as well.) See PBDB ref. 7215. This fauna is between j (early Wenlock) and k (upper Wenlock/lower Ludlow). | |||||
Lithology and environment
| Primary lithology: | argillaceous "limestone" | ||
| Secondary lithology: | "shale" | ||
| Lithology description: "...sequence of buff and light brown weathering, thinly bedded limestones, dolomites and shales that overlie the Whittaker Formation and underlie the Camsell Formation...The beds above and including a distinctive buff-brown shale unit in the sections near Avalanche Lake are included in the Delorme Formation in this work, although the lowest buff-brown shaly beds (below distinctive orange coloured limestones and dolomites) could be regarded as transitional between the Road River and Delorme..." (PBDB ref. 7215) | |||
| Environment: | slope | Tectonic setting: | passive margin |
| Glacial or sequence phase: | highstand systems tract | ||
| Geology comments: Grand Cycle 3.
SEP environmental call based primarily on PBDB ref. 7215. | |||
Taphonomy
| Modes of preservation: | replaced with silica |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Reason for describing collection: | taxonomic analysis |
Metadata
| Database number: | 26059 | ||
| Authorizer: | M. Foote, M. Hopkins | Enterer: | M. Foote, M. Hopkins |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2002-10-01 13:54:26 | Last modified: | 2025-02-22 15:12:02 |
| Access level: | the public | Released: | 2002-10-01 13:54:26 |
| Creative Commons license: | CC0 |
Reference information
Primary reference:
| 7217. | D. J. Siveter and B. D. E. Chatterton. 1996. Silicified calymenid trilobites from the Mackenzie Mountains, northwest Canada. Palaeontographica Abteilung A 239(1-3):43-60 [M. Foote/M. Foote/M. Foote] |
Secondary references:
| 7231 | J. M. Adrain and B. D. E. Chatterton. 1996. The otarionine trilobite Cyphaspis, with new species from the Silurian of northwestern Canada. Journal of Paleontology 70(1):100-110 [M. Foote/M. Foote/M. Foote] | |
| 7222 | M. W. Caldwell and B. D. E. Chatterton. 1995. Phylogenetic analysis of some Silurian rostroconchs (Mollusca) from northwestern Canada. Canadian Journal of Earth Sciences 32:806-827 [M. Foote/M. Foote/M. Foote] | |
| 63116 | M. J. Campbell and B. D. E. Chatterton. 2006. Late Ordovician and Silurian lichid trilobites from northwestern Canada: eight new species from subfamilies Lichinae, Platylichinae, and Trochurinae. Journal of Paleontology 80(3):514-528 [M. Hopkins/M. Hopkins] | |
| 25908 | M. J. Campbell and B. D. E. Chatterton. 2007. Late Ordovician and Silurian lichid trilobites from Northwestern Canada: Hemiarges, Borealarges, and Richterarges. Journal of Paleontology 81(6):1348-1364 [P. Wagner/P. Wagner/P. Wagner] | |
| 7229 | G. D. Edgecombe and B. D. E. Chatterton. 1990. Mackenziurus, a new genus of the Silurian "Encrinurus" variolaris plexus (Trilobita). American Museum Novitates (2968)1-22 [M. Foote/M. Foote/M. Foote] | |
| 7220 | G. D. Edgecombe and B. D. E. Chatterton. 1993. Silurian (Wenlock-Ludlow) encrinurine trilobites from the Mackenzie Mountains, Canada, and related species. Palaeontographica Abteilung A 229(4-6):75-112 [M. Foote/M. Foote/M. Foote] | |
| 7218 | J. Jin and B. D. E. Chatterton. 1997. Latest Ordovician-Silurian articulate brachiopods and biostratigraphy of the Avalanche Lake area, southwestern District of Mackenzie, Canada. Palaeontographica Canadiana 13:1-62 [M. Foote/M. Foote/M. Foote] |