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Sørbakken, Buskerud, Norway

FormationSørbakken
Age:450 - 444 Ma
Paleozoic
IntervalRawtheyan - Cautleyan
Lithologylimestone/"shale", "limestone", "shale"
Number of Collections7
Number of Occurrences52

Recorded Sample Locations

LocationRegionStratigraphic Name
FrognøyaHole, Buskerud, NorwaySørbakken
FrognøyaHole, Buskerud, NorwaySørbakken
FrognøyaHole, Buskerud, NorwaySørbakken
NorderhovRingerike, Buskerud, NorwaySørbakken
Vestre SvartøyaHole, Buskerud, NorwaySørbakken

Associated Units

Stratigraphic NameAgeLithologyOccurrence Records
Bønsnes450 - 443 Ma
Paleozoic
limestone/lime mudstone, "limestone", "shale"/"limestone"97
Elnes464 - 461 Ma
Middle Ordovician
shale/"limestone", "shale", "limestone"122
Langøyene445 - 443 Ma
Paleozoic
sandstone, "limestone"110
Nakkholmen456 - 452 Ma
Late/Upper Ordovician
limestone/"shale", "shale", lime mudstone/"limestone"94
Solvang456 - 446 Ma
Late/Upper Ordovician
limestone/"shale", "limestone", "shale"216
Solvang - Høgberg458 - 452 Ma
Late/Upper Ordovician
limestone25
Tretaspis Limestone450 - 446 Ma
Late/Upper Ordovician
limestone1
Venstøp450 - 445 Ma
Late/Upper Ordovician
shale, "limestone"33
Venstøp - Frognøya450 - 446 Ma
Late/Upper Ordovician
shale7
Vollen458 - 450 Ma
Ordovician
limestone/"shale", "shale"/"limestone", "limestone"136

Recorded Fossils

Accepted NameHierarchyAge
Isotelus sp.
genus
6Animalia : Arthropoda : Trilobita : Asaphida : Asaphidae : Isotelus455.8 - 445.6 Ma
Late/Upper Ordovician
Isotelus frognoensis
species
7Animalia : Arthropoda : Trilobita : Asaphida : Asaphidae : Isotelus : Isotelus frognoensis455.8 - 445.6 Ma
Late/Upper Ordovician
Remopleurides sp.
genus
6Animalia : Arthropoda : Trilobita : Asaphida : Remopleurididae : Remopleurides455.8 - 445.6 Ma
Late/Upper Ordovician
Remopleurides emarginatus
species
7Animalia : Arthropoda : Trilobita : Asaphida : Remopleurididae : Remopleurides : Remopleurides emarginatus455.8 - 445.6 Ma
Late/Upper Ordovician
Tretaspis sp.
genus
6Animalia : Arthropoda : Trilobita : Asaphida : Trinucleidae : Tretaspis455.8 - 445.6 Ma
Late/Upper Ordovician
Tretaspis anderssoni
species
7Animalia : Arthropoda : Trilobita : Asaphida : Trinucleidae : Tretaspis : Tretaspis anderssoni455.8 - 445.6 Ma
Late/Upper Ordovician
Tretaspis ceriodes
species
7Animalia : Arthropoda : Trilobita : Asaphida : Trinucleidae : Tretaspis : Tretaspis ceriodes449.5 - 445.6 Ma
Late/Upper Ordovician
Tretaspis hisingeri
species
7Animalia : Arthropoda : Trilobita : Asaphida : Trinucleidae : Tretaspis : Tretaspis hisingeri455.8 - 445.6 Ma
Late/Upper Ordovician
Tretaspis seticornis
species
7Animalia : Arthropoda : Trilobita : Asaphida : Trinucleidae : Tretaspis : Tretaspis seticornis455.8 - 445.6 Ma
Late/Upper Ordovician
Holotrachelus punctillosus
species
7Animalia : Arthropoda : Trilobita : Aulacopleurida : Holotrachelidae : Holotrachelus : Holotrachelus punctillosus455.8 - 445.6 Ma
Late/Upper Ordovician
Illaenus (Parillaenus) roemeri
species
7Animalia : Arthropoda : Trilobita : Corynexochida : Illaenidae : Illaenus : Illaenus (Parillaenus) roemeri455.8 - 445.6 Ma
Late/Upper Ordovician
Stenopareia glaber
species
7Animalia : Arthropoda : Trilobita : Corynexochida : Illaenidae : Stenopareia : Stenopareia glaber455.8 - 445.6 Ma
Late/Upper Ordovician
Panderia insulana
species
7Animalia : Arthropoda : Trilobita : Corynexochida : Panderiidae : Panderia : Panderia insulana452 - 443.7 Ma
Paleozoic
Stygina latifrons
species
7Animalia : Arthropoda : Trilobita : Corynexochida : Styginidae : Stygina : Stygina latifrons455.8 - 445.6 Ma
Late/Upper Ordovician
Stygina minor
species
7Animalia : Arthropoda : Trilobita : Corynexochida : Styginidae : Stygina : Stygina minor455.8 - 445.6 Ma
Late/Upper Ordovician
Primaspis (Primaspis) bucculenta
species
7Animalia : Arthropoda : Trilobita : Odontopleurida : Odontopleuridae : Primaspis : Primaspis (Primaspis) bucculenta455.8 - 445.6 Ma
Late/Upper Ordovician
Primaspis evoluta
species
7Animalia : Arthropoda : Trilobita : Odontopleurida : Odontopleuridae : Primaspis : Primaspis evoluta455.8 - 445.6 Ma
Late/Upper Ordovician
Flexicalymene trinucleina
species
7Animalia : Arthropoda : Trilobita : Phacopida : Calymenidae : Flexicalymene : Flexicalymene trinucleina455.8 - 445.6 Ma
Late/Upper Ordovician
Sphaerexochus sp.
genus
6Animalia : Arthropoda : Trilobita : Phacopida : Cheiruridae : Sphaerexochus455.8 - 445.6 Ma
Late/Upper Ordovician
Atractopyge sp.
genus
6Animalia : Arthropoda : Trilobita : Phacopida : Encrinuridae : Atractopyge455.8 - 445.6 Ma
Late/Upper Ordovician
Cybeloides (Paracybeloides) sp.
subgenus
6.3Animalia : Arthropoda : Trilobita : Phacopida : Encrinuridae : Cybeloides : Cybeloides (Paracybeloides)455.8 - 445.6 Ma
Late/Upper Ordovician
Erratencrinurus (Celtencrinurus) kiaeri
species
7Animalia : Arthropoda : Trilobita : Phacopida : Encrinuridae : Erratencrinurus : Erratencrinurus (Celtencrinurus) kiaeri455.8 - 445.6 Ma
Late/Upper Ordovician
Calyptaulax norvegicus
species
7Animalia : Arthropoda : Trilobita : Phacopida : Pterygometopidae : Calyptaulax : Calyptaulax norvegicus455.8 - 445.6 Ma
Late/Upper Ordovician
Chasmops sp.
genus
6Animalia : Arthropoda : Trilobita : Phacopida : Pterygometopidae : Chasmops455.8 - 445.6 Ma
Late/Upper Ordovician
Archaegocystis granulata
species
7Animalia : Echinodermata : Diploporita : Sphaeronitidae : Archaegocystis : Archaegocystis granulata455.8 - 445.6 Ma
Late/Upper Ordovician
Cyrtodontula ventricosa
species
7Animalia : Mollusca : Bivalvia : Cyrtodontida : Cyrtodontidae : Cyrtodontula : Cyrtodontula ventricosa455.8 - 445.6 Ma
Late/Upper Ordovician
Cleionychia sp.
genus
6Animalia : Mollusca : Bivalvia : Myalinida : Ambonychiidae : Cleionychia455.8 - 445.6 Ma
Late/Upper Ordovician
Cleionychia primitiva
species
7Animalia : Mollusca : Bivalvia : Myalinida : Ambonychiidae : Cleionychia : Cleionychia primitiva455.8 - 445.6 Ma
Late/Upper Ordovician
Sactoceras tyriense
species
7Animalia : Mollusca : Cephalopoda : Nautilida : Nautilidae : Sactoceras : Sactoceras tyriense455.8 - 445.6 Ma
Late/Upper Ordovician
Centrocyrtoceras frognoyense
species
7Animalia : Mollusca : Cephalopoda : Barrandoceratidae : Centrocyrtoceras : Centrocyrtoceras frognoyense455.8 - 445.6 Ma
Late/Upper Ordovician
Kiaeroceras frognoyense
species
7Animalia : Mollusca : Cephalopoda : Cyrtogomphoceratidae : Kiaeroceras : Kiaeroceras frognoyense455.8 - 445.6 Ma
Late/Upper Ordovician
Strandoceras tyriense
species
7Animalia : Mollusca : Cephalopoda : Discosorida : Cyrtogomphoceratidae : Strandoceras : Strandoceras tyriense455.8 - 445.6 Ma
Late/Upper Ordovician
Cyclendoceras norvegicum
species
7Animalia : Mollusca : Cephalopoda : Endoceratidae : Cyclendoceras : Cyclendoceras norvegicum455.8 - 445.6 Ma
Late/Upper Ordovician
Danoceras sp.
genus
6Animalia : Mollusca : Cephalopoda : Tarphyceratidae : Danoceras455.8 - 445.6 Ma
Late/Upper Ordovician
Lyckholmoceras constrictum
species
7Animalia : Mollusca : Cephalopoda : Tarphyceratidae : Lyckholmoceras : Lyckholmoceras constrictum455.8 - 445.6 Ma
Late/Upper Ordovician
Lyckholmoceras norvegiae
species
7Animalia : Mollusca : Cephalopoda : Tarphyceratidae : Lyckholmoceras : Lyckholmoceras norvegiae455.8 - 445.6 Ma
Late/Upper Ordovician
Hadoceras septocurvatum
species
7Animalia : Mollusca : Cephalopoda : Jovellaniidae : Hadoceras : Hadoceras septocurvatum455.8 - 445.6 Ma
Late/Upper Ordovician
Mixosiphonoceras norvegicum
species
7Animalia : Mollusca : Cephalopoda : Jovellaniidae : Mixosiphonoceras : Mixosiphonoceras norvegicum455.8 - 445.6 Ma
Late/Upper Ordovician
Geisonoceras heintzi
species
7Animalia : Mollusca : Cephalopoda : Geisonoceratidae : Geisonoceras : Geisonoceras heintzi455.8 - 445.6 Ma
Late/Upper Ordovician
Orthoceras sp.
genus
6Animalia : Mollusca : Cephalopoda : Orthoceratidae : Orthoceras455.8 - 445.6 Ma
Late/Upper Ordovician
Ephippiorthoceras frognoyense
species
7Animalia : Mollusca : Cephalopoda : Proteoceratidae : Ephippiorthoceras : Ephippiorthoceras frognoyense455.8 - 445.6 Ma
Late/Upper Ordovician
Isorthoceras heroyense
species
7Animalia : Mollusca : Cephalopoda : Orthocerida : Proteoceratidae : Isorthoceras : Isorthoceras heroyense455.8 - 445.6 Ma
Late/Upper Ordovician
Tyrioceras kjerulfi
species
7Animalia : Mollusca : Cephalopoda : Sinoceratidae : Tyrioceras : Tyrioceras kjerulfi455.8 - 445.6 Ma
Late/Upper Ordovician
Discoceras roemeri
species
7Animalia : Mollusca : Cephalopoda : Tarphycerida : Trocholitidae : Discoceras : Discoceras roemeri455.8 - 445.6 Ma
Late/Upper Ordovician
Sinuites usitatus
species
7Animalia : Mollusca : Gastropoda : Sinuitidae : Sinuites : Sinuites usitatus455.8 - 445.6 Ma
Late/Upper Ordovician

References

Strand T. (1934) The Upper Ordovician Cephalopods of the Oslo Area, Norsk geologiske Tidsskrift 14, 1-117
Bruton D. L. (1968) The trilobite genus Panderia from the Ordovician of Scandinavia and the Baltic areas, Norsk Geologisk Tidsskrift 48, 1-53
Toni R. T. (1975) Upper Ordovician bivalves from the Oslo Region, Norway, Norsk Geologisk Tidsskrift 55 2, 135-156
Owen A. W. (1978) The upper Ordovician succession at Norderhov and on Frognøya in Ringerike, Norway, Norsk Geologisk Tidsskrift 58, 245-258
Owen A. W. (1980) The trilobite Tretaspis from the upper Ordovician of the Oslo region, Norway, Palaeontology 23 4, 715-747
Owen A. W. (1981) The Ashgill Trilobites of the Oslo Region, Norway, Palaeontographica Abteilung A 175, 1-88
Bockelie J. F. (1984) The Diploporita of the Oslo region, Norway, Palaeontology 27 1, 1-68
Bruton D. L., Owen A. W. (1988) Norwegian Upper Ordovician illaenid trilobites, Norsk Geologisk Tidsskrift 68, 241-258
Ebbestad J.O.R., Yochelson E. L. (2000) Isostrophic molluscs (Tergomya and Gastropoda) from the Upper Ordovician of Norway, Norsk Geologisk Tidsskrift 80 2, 187-202
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
 
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