French
DeutschSvanbergfjellet Formation
| Svanbergfjellet Formation | |
|---|---|
| Stratigraphic range: 791.1±4.9 Ma[1] | |
| Type | Formation |
| Unit of | Akademikerbreen Group |
| Underlies | Draken Formation |
| Overlies | Grudievbreen Formation |
| Location | |
| Region | Svalbard |
| Country | Norway |
The Svanbergfjellet Formation is a geologic formation in Svalbard. It preserves eukaryotic fossils dating back to the Late Tonian period, around 790 Ma.
Paleobiota
[edit]After Butterfield et al, 1994.[2]
Color key
| Notes Uncertain or tentative taxa are in small text; |
| Paleobiota | ||||
|---|---|---|---|---|
| Genus | Species | Notes | Images | |
| Proterocladus |
| Filamentous green algae, another species is the earliest such fossil found | .jpg) | |
| Palaeastrum |
| Filamentous eukaryote, possibly a green alga. |  | |
| Pseudotawuia |
| Enigmatic eukaryote, bears two unusual kidney-shaped structures at its tip. | ||
| Tawuia |
| Enigmatic eukaryote, possibly an alga. | ||
| Valkyria |
| Filamentous eukaryote, bears several differentiated cells/cell types, possibly placing it at tissue-grade organisation?[2] | ||
| Cerebrosphaera |
| Acritarch | ||
| Chuaria |
| Acritarch | ||
| Cymatiosphaeroides |
| Acritarch | ||
| Dictyotidium |
| Acritarch | ||
| Germinosphaera |
| Acritarch | ||
| Goniosphaeridium |
| Acritarch | ||
| Gorgonisphaeridium |
| Acritarch | ||
| Leiosphaeridia |
| Acritarch | ||
| Osculosphaera |
| Acritarch | ||
| Pterospermopsimorpha |
| Acritarch | ||
| Trachyhystrichosphaera |
| Acritarch | ||
| Gloeodiniopsis |
| Cyanobacteria | ||
| Eoentophysalis |
| Cyanobacteria | ||
| Polybessurus |
| Cyanobacteria | ||
| Obruchevella |
| Cyanobacteria | ||
| Eosynechococcus |
| Cyanobacteria | ||
| Sphaerophycus |
| Cyanobacteria | ||
| Cephalonyx |
| Cyanobacteria | ||
| Cyanonema |
| Cyanobacteria | ||
| Oscillatoriopsis |
| Cyanobacteria | ||
| Palaeolyngbya |
| Cyanobacteria | ||
| Siphonophycus |
| Cyanobacteria | ||
| Tortunema |
| Cyanobacteria | ||
| Brachypleganon |
| Cyanobacteria | ||
| Chlorogloeaopsis |
| Cyanobacteria | ||
| Digitus |
| Cyanobacteria | ||
| Myxococcoides |
| Cyanobacteria | ||
| Ostiana |
| Cyanobacteria | ||
| Palaeosiphonella |
| Cyanobacteria | ||
References
[edit]- ^ Mughal, Sanaa; Millikin, Alexie E. G.; Zhang, Tianran; Gibson, Timothy M.; Rooney, Alan D.; Tosca, Nicholas J.; Bergmann, Kristin D.; Strauss, Justin V.; Anderson, Ross P. (25 February 2025). "The Svanbergfjellet Formation: eukaryotic life in a Tonian Sea". Journal of the Geological Society. 182 (3). doi:10.1144/jgs2024-083.
- ^ a b Butterfield, Nicholas J.; Knoll, Andrew H.; Swett, Keene (15 July 1994). "Paleobiology of the Neoproterozoic Svanbergfjellet Formation, Spitsbergen". Fossils and Strata. 34. doi:10.18261/8200376494-1994-01.