Eriksdal (VC11): Berriasian, Sweden

List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
unclassified
Hybodontoid indet.
Albanerpetonidae indet.
Ptychostylus sp.
Chondrichthyes - Hybodontiformes - Lonchidiidae
Parvodus rugianus (Ansorge 1990)
Chondrichthyes - Hybodontiformes - Hybodontidae
Egertonodus basanus (Egerton 1845)
Chondrichthyes - Hybodontiformes - Polyacrodontidae
Hybodus parvidens Woodward 1916
recombined as Polyacrodus parvidens
Actinopterygii
Actinopterygii indet. Cope 1887
Reptilia - Crocodylia
Crocodylia indet. (Owen 1842)
Gastropoda - Viviparidae
Viviparus sp. Montfort 1810
Gastropoda - Neritidae
Neritoplica sp. Oppenheim 1892
Bivalvia - Cardiida - Neomiodontidae
Neomiodon sp.
Bivalvia - Ostreida - Malleidae
Isognomon sp. Lightfoot 1786
see common names

Geography
Country:Sweden State/province:Scania
Coordinates: 59.3° North, 18.1° East (view map)
Paleocoordinates:50.9° North, 23.6° East
Basis of coordinate:based on nearby landmark
Geographic resolution:outcrop
Time
Period:Cretaceous Epoch:Early/Lower Cretaceous
Stage:Berriasian 10 m.y. bin:Cretaceous 1
Key time interval:Berriasian
Age range of interval:145.00000 - 139.80000 m.y. ago
Stratigraphy
Formation:Annero Member:Vitaback Clay
Local section:Vitaback Clays Local bed:VC!!
Stratigraphy comments: The lowermost parts of the section (beds VC1 and VC2) contained spores of the genus Cicatricosisporites, previously known only from the Early Cretaceous (V. Vajda pers.comm.). Thus, the whole section described in this work is considered to be Berriasian or possibly younger, although the lower parts of the VitabaÈ ck Clays, not treated here, are likely to be Tithonian (ErlstroÈm et al. 1991). Berriasian age is further indicated by the composition of the shark fauna, which is very similar to that of Berriasian sediments within the Purbeck Group in southern England (Underwood & Rees 2002).
Lithology and environment
Primary lithology: lithified claystone
Secondary lithology: lithified siltstone
Lithology description: The Vitaback Clays primarily include alternating clay and silt deposits (ErlstroÈm et al. 1991). Layers of sand occur less frequently, often as thinner beds.
Environment:fluvial-deltaic indet.
Geology comments: The faunal and floral composition was studied by ErlstroÈm et al. (1991), who suggested brackish and freshwater environments with occasional marine influence.

The amphibian remains occurring in VC11 suggest that this bed may have been deposited in a ¯oodplain lake (Fig. 5). The coquina bed VC3 was deposited closer to the shallow sea (Fig. 5), probably in a lagoonal environment. The erosional boundary at the bottom of VC3 may indicate that the bed is a storm concentration. The enrichment of shells in VC11 is more gradual and there is no erosional boundary at the bottom of the bed, perhaps indicating an environment such as a ¯oodplain lake or pond. The molluscs have possibly been concentrated by migration when the water in the pond evaporated (cf. Noe-Nygaard et al. 1987). The presence of amphibian remains, in combination with the rarity of shark teeth in VC7, may indicate that this bed was deposited in a freshwater environment.
Taphonomy
Modes of preservation:body
Size of fossils:macrofossils
Collection methods and comments
Reason for describing collection:taxonomic analysis
Metadata
Database number:144786
Authorizer:M. Bell Enterer:M. Bell
Modifier:M. Bell
Created:2013-05-17 18:35:36 Last modified:2013-05-17 03:54:23
Access level:the public Released:2013-05-17 18:35:36
Creative Commons license:CC BY
Reference information

Primary reference:
46855. J. Rees. 2002. Shark fauna and depositional environment of the earliest Cretaceous Vitabäck Clays at Eriksdal, southern Sweden. Earth and Environmental Science Transactions of the Royal Society of Edinburgh 93:59-71 [M. Bell/M. Bell/M. Bell]