Delthyris elevata-Howellella elegans Community in Holmestrand District: Sheinwoodian, Norway
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
Trilobita
- Phacopida
- Calymenidae
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Calymenidae indet.
Milne-Edwards 1840
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Ostracoda
- Leperditicopida
- Leperditiidae
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Herrmannina sp.
Kegel 1933
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Strophomenata
- Strophomenida
- Rafinesquinidae
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Leptaena depressa
(Sowerby 1824)
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recombined as Leptaena (Leptaena) depressa | ||||||||||
Rhynchonellata
- Spiriferida
- Delthyrididae
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Delthyris elevata
Dalman 1828
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Howellella elegans
Muir-Wood 1925
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Rhynchonellata
- Athyridida
- Athyrididae
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cf. Glassina sp.
Hall and Clarke 1893
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Rhynchonellata
- Rhynchonellida
- Machaerariidae
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Ferganella borealis
(Buch 1834)
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recombined as Stegerhynchus borealis | ||||||||||
Rhynchonellata
- Rhynchonellida
- Rhynchotrematidae
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Ferganella diodonta
(Dalman 1828)
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recombined as Stegerhynchus diodontus | ||||||||||
Rhynchonellata
- Rhynchonellida
- Trigonirhynchiidae
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Microsphaeridiorhynchus ? nucula
(Sowerby 1839)
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Rhynchotreta cuneata
(Dalman 1828)
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Rhynchonellata
- Atrypida
- Glassiidae
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cf. Glassia cf. laeviuscula
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Bivalvia
- Ostreida
- Pterineidae
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Actinopteria sowerbyi
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Pteronitella retroflexa
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Cephalopoda
- Orthocerida
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Orthoceratida indet.
(Kuhn 1940)
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original and current combination Orthocerida | ||||||||||
Orthoceratid sp. A | ||||||||||
see common names |
Geography
Country: | Norway |
Coordinates: | 68.8° North, 15.0° East (view map) |
Paleocoordinates: | 12.2° South, 9.5° West |
Basis of coordinate: | based on nearby landmark |
Geographic resolution: | local area |
Time
Period: | Silurian | Epoch: | Wenlock |
Stage: | Sheinwoodian | 10 m.y. bin: | Silurian 2 |
*International age/stage: | Late/Upper Sheinwoodian - Early/Lower Homerian | ||
Key time interval: | Sheinwoodian | ||
Age range of interval: | 433.40000 - 430.50000 m.y. ago | ||
* legacy (obsolete) database fields |
Stratigraphy
Formation: | Steinsfjorden | ||||
Stratigraphic resolution: | formation | ||||
Stratigraphy comments: Middle part of Steinsfjorder Fmn., Late Sheinwoodian or Early Homerian. |
Lithology and environment
Primary lithology: | argillaceous "carbonate" |
Includes fossils? | Y |
Lithology description: "This is a low diversity comm. developed in carbonates where brachiopods are eurytopic (present in most communities in the succession)..." | |
Environment: | marine indet. |
Geology comments: "The facies represent a low energy, muddly lagoonal environment with periodically stagnant waters, as indicated by pseudomorphs of sulfate minerals, although these minerals might be more suggestive of within sediment conditions rather than sediment surface and overlying water conditions. In similar environments, where the sed. rate was high and the bottom v. soft, the Microsphaeridiorhynchus nucula Comm. usually replaced this one. this is probably a BA 2 to 3 unit." |
Taphonomy
Collection methods and comments
Collection excludes: | some macrofossils |
Reason for describing collection: | paleoecologic analysis |
Collection method comments: Table 22.4 gives absolute and relative abundances. | |
Taxonomic list comments:Some taxa not listed to genus level. |
Metadata
Database number: | 14275 | ||
Authorizer: | M. Foote | Enterer: | M. Foote |
Modifier: | M. Foote | Research group: | marine invertebrate |
Created: | 2002-05-29 13:08:28 | Last modified: | 2006-09-15 15:14:05 |
Access level: | the public | Released: | 2002-05-29 13:08:28 |
Creative Commons license: | CC BY |
Reference information
Primary reference:
6308. | B. G. Baarli, H. B. Keilen, and M. E. Johnson. 1999. Silurian communities of the Oslo Region, Norway. In A. J. Boucot and J. D. Lawson (eds.), Paleocommunities--a case study from the Silurian and Lower Devonian 327-349 [M. Foote/M. Foote/P. Wagner] |