Lunden, Särdal, reworked phosphatised rocks, Halland (Cretaceous of Sweden)

Where: Sweden (56.8° N, 12.6° E: paleocoordinates 46.0° N, 11.4° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Late/Upper Cenomanian (99.6 - 93.5 Ma)

• reworked phosphatised rock fragments found in the limestone and the sandstone (Särdal beds); 'based on the presence of Actinocamax ex gr. primus/plenus, can be assigned to the late Cenomanian and/or the A. plenus Zone between the Cenomanian and the Turonian. it is also possible that the Turonian and/or Coniacian may be represented by some rock pieces, but this cannot be verified at present'

• group of beds-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, fine-grained, gray grainstone

• 'a varied and abundant fauna of hexactinellid sponges indicates that the transgression in the late Cenomanian and/or A. plenus Zone involved a rise in the water level of about 100 m.'
• 'The derived phosphatised rock fragments consist of fossiliferous grey limestone... the grey limestone is a fine-grained, light-coloured calcarenite with scattered grains of glauconite.'

Size classes: macrofossils, microfossils

Collection methods: authors and amateur collections;

•Museum repositories: Geological Survey of Sweden (EN), the Mineralogical Museum in Copenhagen (MMH), Geological Institute in Lund (LO)

Primary reference: J. Bergström, W. K. Christensen, C. Johansson and E. Norling. 1973. An extension of Upper Cretaceous Rocks to the Swedish west coast at Särdal. Bull. geol. Soc. Denmark 22:83-154 [M. Aberhan/S. Nurnberg/J. Alroy]more details

Purpose of describing collection: biostratigraphic analysis

PaleoDB collection 70427: authorized by Martin Aberhan, entered by Sabine Nürnberg on 22.03.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• '...yielded a rich fauna which, except for the cephalopods, is only preliminarily treated'
Rhynchonellata
 Terebratulida -
? Rhynchora sp. Dalman 1828
 Terebratulida - Sellithyrididae
 Rhynchonellida - Rhynchonellidae
"Rhynchonella ? grasiana" = Grasirhynchia grasiana d'Orbigny 1849
"R." grasiana d'Orbigny?
Bivalvia
  -
Bivalvia indet. Linnaeus 1758 clam
 Arcida - Arcidae
Barbatia sp. Gray 1842 clam
 Arcida - Glycymerididae
? Glycymeris sp. Da Costa 1778 clam
 Myalinida - Inoceramidae
Inoceramus sp. Sowerby 1814 clam
 Pectinida - Pectinoidae
Spondylus sp. Linnaeus 1758 scallop
Pectinidae indet. Wilkes 1810 scallop
 Pectinida - Limidae
Lima sp. Bruguière 1797 file clam
 Carditida - Crassatellidae
Crassatella sp. Lamarck 1799 clam
 Cardiiformii -
"? Hippuritoida indet." = Hippuritida
"? Hippuritoida indet." = Hippuritida Newell 1965 rudist
?Requeniidae indet.
 Lucinida - Lucinidae
Lucinidae indet. Fleming 1828 clam
Gastropoda
  -
Gastropoda indet. Cuvier 1797 snail
 Trochoidea - Trochidae
? Trochus sp. Linnaeus 1758 top snail
Gibbula sp. Risso 1826 top snail
Cephalopoda
 Belemnoidea -
Belemnitida indet. Zittel 1895 belemnite
 Belemnitida - Belemnitellidae
Actinocamax ex gr. primus belemnite
A. ex gr. primus/plenus
? Actinocamax sp. Miller 1823 belemnite
 Ammonitida - Baculitidae
Baculites sp. Lamarck 1799 ammonite
 Nautiloidea -
Nautiloidea indet. Agassiz 1847 nautiloid
Nautiloid
Gnathostomata
  -
Chondrichthyes indet. Huxley 1880 cartilaginous fish
Chondrichthyes
 Hybodontiformes - Ptychodontidae
Ptychodus mammillaris Agassiz 1839 elasmobranch
 Lamniformes - Anacoracidae
 Lamniformes - Lamnidae
Isurus zippei mako shark
? Lamna sp. Cuvier 1816 mackerel shark
 Lamniformes - Cretoxyrhinidae
"Isurus cf. mantelli" = Cretoxyrhina mantelli, "Lamna appendiculata" = Cretolamna appendiculata
"Isurus cf. mantelli" = Cretoxyrhina mantelli Agassiz 1843 mackerel shark
"Lamna appendiculata" = Cretolamna appendiculata Agassiz 1843 mackerel shark
 Chimaeriformes -
Chimaeriformes indet. Obruchev 1953 chimaera
Chimaerid, jaw fragments
Reptilia
 Squamata - Mosasauridae
? Plioplatecarpus sp. Dollo 1882 mosasaur
Hexactinellida
  -
Hexactinellida indet. Schmidt 1870 glass sponge
at least four species
 Lychniscosa - Ventriculitidae
Ventriculites sp. Mantell 1822 glass sponge
? Rhizopoterion sp. Zittel 1877 glass sponge
 Lychniscosa - Callodictyonidae
Plocoscyphia sp. Reuss 1846 glass sponge
 Hexactinosa - Euretidae
Myliusia sp. Gray 1859 glass sponge
 Hexactinosa - Cribrospongiidae
? Cribrospongia sp. d'Orbigny 1849 glass sponge