Norderon, Jamtland: Llandovery, Sweden
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Strophomenata
- Orthotetida
- Chilidiopsidae
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? Fardenia sp.
Lamont 1935
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| originally entered as "? Fardenia sp." | ||||||||||
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Strophomenata
- Strophomenida
- Leptostrophiidae
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Eostropheodonta sp.
Bancroft 1949
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Rhynchonellata
- Pentamerida
- Virgianidae
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Virgianidae indet.
Boucot and Amsden 1963
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| excluded from Virgiana and Platymerella by lack of low plications, from Holorhynchus by lack of median septum in pedicle valve. | ||||||||||
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Rhynchonellata
- Athyridida
- Meristellidae
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? Cryptothyrella sp.
Cooper 1942
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| synonym of Hindella | ||||||||||
| originally entered as "? Cryptothyrella sp." | ||||||||||
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Rhynchonellata
- Atrypida
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Protatrypa thorslundi
Boucot and Johnson 1964
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| n. sp. | ||||||||||
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Rhynchonellata
- Orthida
- Dalmanellidae
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Dalmanella aff. testudinaria
(Dalman 1828)
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| originally entered as "Dalmanella aff. testudinaria" | ||||||||||
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= Isorthis (Protocortezorthis) prima
Walmsley and Boucot 1975
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Baarli 1988 | |||||||||
| synonym of Levenea llandoveriana | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Sweden |
| Coordinates: | 63.4° North, 12.9° East (view map) |
| Paleocoordinates: | 21.0° South, 8.6° West |
| Basis of coordinate: | based on political unit |
| Geographic resolution: | outcrop |
Time
| Period: | Silurian | Epoch: | Llandovery |
| 10 m.y. bin: | Silurian 1 | *Epoch: | Early/Lower Llandovery |
| Key time interval: | Llandovery | ||
| Age range of interval: | 443.80000 - 433.40000 m.y. ago | ||
| * legacy (obsolete) database fields | |||
Stratigraphy
| Formation: | Ede Quartzite | ||||
| Stratigraphic resolution: | formation | ||||
| Stratigraphy comments: "The assemblage is adequate to indicate that the Ede Quartzite at this locality is of Early Llandovery age." | |||||
Lithology and environment
| Primary lithology: | lithified calcareous sandstone |
| Environment: | marine indet. |
| Geology comments: Fauna preserved as internal and external molds. "Quartzite" is cemented by calcite. | |
Taphonomy
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | bulk,chemical,mechanical,field collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: "Preparation was accomplished by means of a rock splitter combined with mild acid treatment, the latter exposing the internal structures of the shell adequately. The leached specimens must be hardened with a plastic dissolved in a solvent." | |
| Taxonomic list comments:Brachiopods only. | |
Metadata
| Database number: | 3347 | ||
| Authorizer: | J. Alroy, P. Wagner | Enterer: | M. Sommers, P. Wagner |
| Modifier: | C. Visaggi | Research group: | marine invertebrate |
| Created: | 1999-07-30 14:12:10 | Last modified: | 2004-03-11 16:25:06 |
| Access level: | the public | Released: | 2000-11-20 13:53:19 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 186. | A. J. Boucot and J. G. Johnson. 1964. Brachiopods of the Ede Quartzite (Lower Llandovery) of Norderon, Jamtland. Bulletin of the Geological Institution of the University of Upsala 42(9):1-11 [J. Alroy/M. Sommers/J. Alroy] |
Secondary references:
| 52248 | B. G. Baarli. 1988. The Llandovery enteletacean brachiopods of the central Oslo region, Norway. Palaeontology 31(4):1101-1129 [P. Wagner/P. Wagner] |