GSC C-22184, Baillie-Hamilton Island: Sheinwoodian, Canada
Where & when
Geology
Taphonomy & methods
Metadata & references
Geography
Country: | Canada | State/province: | Nunavut |
Coordinates: | 75.8° North, 94.5° West (view map) | ||
Paleocoordinates: | 3.5° North, 32.7° West | ||
Basis of coordinate: | estimated from map | ||
Geographic resolution: | local area |
Time
Period: | Silurian | Epoch: | Wenlock |
Stage: | Sheinwoodian | 10 m.y. bin: | Silurian 2 |
Key time interval: | Sheinwoodian | Zone: | Monograptus riccartonensis |
Age range of interval: | 433.40000 - 430.50000 m.y. ago |
Stratigraphy
Formation: | Cape Phillips | ||||
Local section: | C | Local bed: | 97.5 ft | ||
Local order: | bottom to top | ||||
Stratigraphic resolution: | formation | ||||
Stratigraphy comments: According to author, material is from between the murchisoni and lundgreni zones. This would make it Sheinwoodian, although author simply refers to it as Wenlockian. |
Lithology and environment
Primary lithology: | shelly/skeletal "limestone" | ||
Secondary lithology: | calcareous "shale" | ||
Includes fossils? | Y | ||
Lithology description: "..Formation consists of shale and thin bedded, laminated siltstone and limestone...Section [with faunas] broadly divisible into two lithofacies: a lower part about 25 m thick, consists mainly of medium grey, thin bedded argillaceous Lst that is variably dolomitic...and an upper part, about 65 m thick, consisting mainly of very dark grey, very thin bedded argillaceous Lst that is markedly bituminous and commonly planar laminated...These beds appear to represent sediment gravity flows that were derived from platform carbonates...some 10 km to the east. The brachiopods and conodonts were obtained from the bioclastic beds and are therefore presumed to be allochthonous." | |||
Environment: | slope | Tectonic setting: | passive margin |
Geology comments: "...Formation...represents the slope-to-basinal facies equivalent of coeval platform carbonates that occur to S and E..."
SEP environmental call based on given info and regional context |
Taphonomy
Modes of preservation: | replaced with silica |
Collection methods and comments
Collection excludes: | some macrofossils |
Reason for describing collection: | taxonomic analysis |
Museum repositories: | GSC |
Collection method comments: Lump this with other 22184 | |
Taxonomic list comments:List in Part I of monograph (PBDB ref. 7205) covers all the brachiopods, whereas the systematic treatment is spread out through three parts (refs. 7205-7207). |
Metadata
Also known as: | Brachiopods, Cape Phillips Formation, | ||
Database number: | 26010 | ||
Authorizer: | M. Foote | Enterer: | M. Foote |
Modifier: | P. Wagner | Research group: | marine invertebrate |
Subset of collection #: | 26003 | ||
Created: | 2002-09-30 15:43:53 | Last modified: | 2006-09-15 15:35:04 |
Access level: | the public | Released: | 2002-09-30 15:43:53 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
7205. | N. Zhang. 1989. Wenlockian (Silurian) brachiopods of the Cape Phillips Formation, Baillie Hamilton Island, Arctic Canada: part I. Palaeontographica Abteilung A 206(1-3):49-97 [M. Foote/M. Foote/P. Wagner] |