Conception and St. John's Group, Newfoundland - Anderson and Conway Morris 1982: Poundian, Canada
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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unclassified
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Glassnerina sp.
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Problematica indet.
Andrews 1970
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| represents ten unknown genera | ||||||||||
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Cnidaria indet.
Hatschek 1888
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Charnia masoni
Ford 1958
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| see common names | ||||||||||
Geography
| Country: | Canada | State/province: | Newfoundland and Labrador |
| Coordinates: | 47.6° North, 52.7° West (view map) | ||
| Paleocoordinates: | 81.4° South, 82.8° East | ||
| Basis of coordinate: | based on political unit | ||
| Geographic resolution: | local area |
Time
| Period: | Ediacaran | ||
| *Period: | Neoproterozoic | *Epoch: | Ediacara |
| *International age/stage: | Poundian | ||
| Key time interval: | Poundian | ||
| Age range of interval: | 571.7 - 538.8 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Geological group: | Conception and St. John'ss | Formation: | Trepassey and Fermeuse | ||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: Total thickness of fossil sequence is 2000m. | |||||
Lithology and environment
| Primary lithology: | grading lithified "shale" |
| Secondary lithology: | lithified siltstone |
| Lithology description: shale and siltstone as indicated by Text Fig. 1 (graded with intermittent sub-aerial volcanic debri) | |
| Environment: | basinal (siliciclastic) |
Taphonomy
| Modes of preservation: | cast |
| Size of fossils: | mesofossils,microfossils |
Collection methods and comments
| Collection methods: | field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: The article talks of the Avalon fauna differing from the Ediacaran fauna due to an interpretted shallow environment for the E. fauna and a deep environment for the A. fauna. Unfortunately, more recent studies on the paleoenvironment were not able to be found. NOTE: The article indicates that the age of the fossils to be latest Riphean to earliest Vendian. However, Harland 1989 indicates that both the upper Conception and entire St. John's Groups are Vendian in age of the Ediacara epoch and Poundian stage. | |
| Taxonomic list comments:Fauna not described to the genus level: 1. pectinate forms - casts in convex relief, most likely a colonial organism 2. bush-like form - extinct/unknown metazoan, bush like dendrite-like colony. 3. spindle-shaped form - moulds of soft body, bilaterally symmetry, most likely belonged to a group of planktonic colonial hydrozoans. 4. star shaped form - 2 forms, preserved as casts, thought to be an organism and not a tunnel system or basal attachment. | |
Metadata
| Database number: | 10285 | ||
| Authorizer: | M. Patzkowsky | Enterer: | P. Borkow |
| Modifier: | P. Wagner | Research group: | marine invertebrate |
| Created: | 2001-03-30 12:03:00 | Last modified: | 2020-02-02 16:35:26 |
| Access level: | the public | Released: | 2001-03-30 12:03:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 3822. | M. M. Anderson and S. Conway Morris. 1982. A review, with descriptions of four unusual forms, of the soft-bodied fauna of the Conception and St. Joh's Groups (Late-Precambrian), Avalon Peninsula, Newfoundland. Third North American Paleontological Convention, Proceedings Vol. 1 1:1-8 [M. Patzkowsky/P. Borkow/P. Wagner] |