Leangella-Dicoelosia ass'n. of Solvik Fmn. in Oslo-Asker Districts: Aeronian, Norway
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
|
Anthozoa
- Rugosa
|
||||||||||
|
Rugosa indet.
Milne-Edwards and Haime 1850
|
44 specimens | |||||||||
|
Anthozoa
- Heliolitida
- Heliolitidae
|
||||||||||
|
Heliolitidae indet.
Lindström 1876
|
4 specimens | |||||||||
|
Trilobita
|
||||||||||
|
Trilobita indet.
Walch 1771
|
4 specimens | |||||||||
|
unclassified
|
||||||||||
|
Bryozoa indet.
Ehrenberg 1831
|
59 specimens | |||||||||
| Includes ramose and globular forms. | ||||||||||
|
Stenolaemata
- Fenestrata
|
||||||||||
|
Fenestrata indet.
(Elias and Condra 1957)
|
102 specimens | |||||||||
| synonym of Fenestelloidea | ||||||||||
|
Rhynchonellata
- Pentamerida
- Stricklandiidae
|
||||||||||
|
Stricklandia lens
(Sowerby 1839)
|
5 specimens | |||||||||
|
Rhynchonellata
- Atrypida
- Lissatrypidae
|
||||||||||
|
? Meifodia sp.
|
12 specimens | |||||||||
|
Rhynchonellata
- Athyridida
- Meristellidae
|
||||||||||
|
Cryptothyrella sp.
Cooper 1942
|
3 specimens | |||||||||
| synonym of Hindella | ||||||||||
|
Rhynchonellata
- Orthida
- Dalmanellidae
|
||||||||||
|
Isorthis sp.
Kozlowski 1929
|
29 specimens | |||||||||
|
Rhynchonellata
- Orthida
- Dicoelosiidae
|
||||||||||
|
Dicoelosia osloensis
Wright 1968
|
23 specimens | |||||||||
|
Strophomenata
- Strophomenida
- Sowerbyellidae
|
||||||||||
|
Eoplectodonta duplicata
(de Sowerby and Murchison 1839)
|
34 specimens | |||||||||
| recombined as Eoplectodonta (Eoplectodonta) duplicata | ||||||||||
|
Strophomenata
- Strophomenida
- Leptestiidae
|
||||||||||
|
Leangella scissa
(Davidson 1871)
|
169 specimens | |||||||||
|
Strophomenata
- Strophomenida
- Furcitellidae
|
||||||||||
|
Katastrophomena penkillensis
(Reed 1917)
|
3 specimens | |||||||||
|
Strophomenata
- Strophomenida
- Rafinesquinidae
|
||||||||||
|
Leptaena haverfordensis
Bancroft 1949
|
2 specimens | |||||||||
| recombined as Leptaena (Leptaena) haverfordensis | ||||||||||
|
Strophomenata
- Strophomenida
- Leptostrophiidae
|
||||||||||
|
Eostropheodonta sp.
Bancroft 1949
|
4 specimens | |||||||||
|
Tentaculitida
- Tentaculitidae
|
||||||||||
|
Tentaculites sp.
von Schlotheim 1820
|
12 specimens | |||||||||
| Given as "Tentaculites" | ||||||||||
| see common names | ||||||||||
Geography
| Country: | Norway |
| Coordinates: | 59.9° North, 10.8° East (view map) |
| Paleocoordinates: | 25.7° South, 8.8° West |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | local area |
Time
| Period: | Silurian | Epoch: | Llandovery |
| Stage: | Aeronian | 10 m.y. bin: | Silurian 1 |
| Key time interval: | Aeronian | ||
| Age range of interval: | 440.80000 - 438.50000 m.y. ago |
Lithology and environment
| Primary lithology: | "shale" |
| Secondary lithology: | mudstone |
| Lithology description: "The vertical sequence of fossil associations can be related to a sequence of sedimentary facies all dominated by shales and mudstones belonging to an open shelf environment. The last phase of the Ordovician/Silurian glacio-eustatic transgression took place while the initial beds of the Solvik Formation were deposited, producing a deep shelf environment...These interpretations are mainly based on frequency, thickness and structures in storm-associated silt and fine sandstone interbeds which occur throughout the formation...The fossils...normally occur scattered all through the sediment and at variable angles to the bedding...Valves are most often disarticulated but fragmentation and orientation are seldom seen...I regard these assemblages as essentially untransported or `disturbed neighborhood assemblages' (Scott 1974) with the exception of some samples from the Leangen Member...[Transport is only local]." | |
| Environment: | marine indet. |
Taphonomy
Collection methods and comments
| Reason for describing collection: | paleoecologic analysis |
| Collection method comments: Abundance data given by Baarli have not been entered. | |
Metadata
| Database number: | 13846 | ||
| Authorizer: | M. Foote | Enterer: | M. Foote |
| Modifier: | M. Foote | Research group: | marine invertebrate |
| Created: | 2002-04-29 19:18:00 | Last modified: | 2006-09-15 15:14:05 |
| Access level: | the public | Released: | 2002-04-29 19:18:00 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 6160. | B. G. Baarli. 1987. Benthic faunal associations in the Lower Silurian Solvik Formation of the Oslo-Asker Districts, Norway. Lethaia 20:75-90 [M. Foote/M. Foote/J. Ju] |