Svanbergfjellet Formation Type Formation Unit of Akademikerbreen Group Underlies Draken Formation Overlies Grudievbreen Formation 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 After Butterfield et al, 1994.[ 2]
Color key Notes small text ; crossed out taxa are discredited.
Paleobiota Genus Species Notes Images Proterocladus P. major P. minor P. hermannae Filamentous green algae , another species is the earliest such fossil found Fossil of P. antiquus , an earlier species from China Palaeastrum Filamentous eukaryote, possibly a green alga. Palaeastrum fossil 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 G. bispinosa G. fibrilla G. jankauskasii Acritarch Goniosphaeridium Acritarch Gorgonisphaeridium Acritarch Leiosphaeridia L. crassa L. jacutica L. tenuissima L. wimanii Acritarch Osculosphaera Acritarch Pterospermopsimorpha Acritarch Trachyhystrichosphaera Acritarch Gloeodiniopsis Cyanobacteria Eoentophysalis E. belcherensis E. croxfordii Cyanobacteria Polybessurus Cyanobacteria Obruchevella Cyanobacteria Eosynechococcus Cyanobacteria Sphaerophycus Cyanobacteria Cephalonyx Cyanobacteria Cyanonema Cyanobacteria Oscillatoriopsis O. vermiformis O. obtusa O. amadeus O. longa Cyanobacteria Palaeolyngbya P. catenata P. hebeiensis Cyanobacteria Siphonophycus S. thulenema S. septatum S. robustum S. typicum S. kestron S. solidum Cyanobacteria Tortunema Cyanobacteria Brachypleganon Cyanobacteria Chlorogloeaopsis Cyanobacteria Digitus Cyanobacteria Myxococcoides M. minor M. cantabrigiensis Cyanobacteria Ostiana Cyanobacteria Palaeosiphonella Cyanobacteria
References ^ 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 .
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