Lunden, Särdal, Division A, Halland (Cretaceous to of Sweden)

Where: Sweden (56.8° N, 12.6° E: paleocoordinates 46.7° N, 12.8° E)

• coordinate estimated from map

• outcrop-level geographic resolution

When: Särdal Beds Formation, Early/Lower Santonian to Early/Lower Santonian (85.8 - 83.5 Ma)

• Division A, conglomeratic limestone; 'dating with the aid of foraminifera and belemnites gives an age around the Early/Middle Santonian boundary'

• bed-level stratigraphic resolution

Environment/lithology: open shallow subtidal; lithified, conglomeratic grainstone

• 'despite the short time interval, two transgressions are recorded... The predominance of a varied fauna of benthic calcareous foriminifera, accompanied by a low and rather constant frequency of arenaceous forms, very likely indicates that this fauna lived in a sublittoral, possibly outer sublittoral environment. Probably, the beds were formed not very distant from the shore... the limestone may have been formed further from the original shore than the sandstone.'
• 'The rock is poorly sorted and consists of conglomerate pebbles, cobbles and boulders in a white argillitic calcarenite with glauconite grains either dispersed or, at some irrgeular surfaces, concentrated to dark bands. Glauconite also covers many shells and pebbles. A coating of phosphorite in some instances, and limonite in others has been observed. The stones are commomly between one and 20 centimetres long and consist mostly of gneiss of the local type or of richly fossiliferous limestone referred to as derived phosphatised rock fragments.'

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 70314: authorized by Martin Aberhan, entered by Sabine Nürnberg on 21.03.2007

Creative Commons license: CC BY (attribution)

Taxonomic list

• '...yielded a rich fauna which, except for the cephalopods, is only preliminarily treated'
Foraminifera
  -
 Globigerinina - Hedbergellidae
 Rotaliina - Lepitorbitoididae
 Globigerinaceae - Globotruncanidae
Nodosariata
 Vaginulinida - Vaginulinidae
 Nodosariida - Nodosariidae
Globothalamea
 Rotaliida - Gavelinellidae
Rhynchonellata
 Terebratulida - Sellithyrididae
Bivalvia
 Ostreida - Gryphaeidae
Exogyra ? obliquata oyster
E. obliquata (Pulteney)?
 Myalinida - Inoceramidae
Inoceramus sp. Sowerby 1814 clam
Cephalopoda
 Belemnoidea -
Belemnitida indet. Zittel 1895 belemnite
 Belemnitida -
Gonioteuthis westfalica belemnite
G. westfalica westfalica
 Belemnitida - Belemnitellidae
Belemnitella propinqua Moberg 1885 belemnite
B. propinqua propinqua