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Stratigrafisk och faunistisk undersökning av Vitabäckslerorna i Skåne

Ekström, Jonas (1985) In Examensarbeten i geologi vid Lunds universitet
Department of Geology
Abstract
The Vitabäck clays, the Jurassic - Cretaceous transitionai beds in Sweden, contain brackish water faunas with close affinities to their counterparts in north-western Europe. The faunas are dominated by the bivalve genera Myrene and Neomiodon. There is no evidence for limnic or marine conditions, which previously has been assumed. The molluscan assemblages indicate somewhat differing salinity conditions. Assemblages dominated by Neomiodon indicate oligohaline to slightly mesohaline waters, and those dominated by Myrene and Ostrea indicate mesohaline to brachyhaline waters. Comparison with similar geological settings in north-western Europe, containing almost identical faunal assemblages, indicate that the main part of the Vitabäck clays is... (More)
The Vitabäck clays, the Jurassic - Cretaceous transitionai beds in Sweden, contain brackish water faunas with close affinities to their counterparts in north-western Europe. The faunas are dominated by the bivalve genera Myrene and Neomiodon. There is no evidence for limnic or marine conditions, which previously has been assumed. The molluscan assemblages indicate somewhat differing salinity conditions. Assemblages dominated by Neomiodon indicate oligohaline to slightly mesohaline waters, and those dominated by Myrene and Ostrea indicate mesohaline to brachyhaline waters. Comparison with similar geological settings in north-western Europe, containing almost identical faunal assemblages, indicate that the main part of the Vitabäck clays is of Berriasian age (Early Cretaceous). The Jurassic - Cretaceous boundary is probably to be found in the lowermost parts of the Vitabäck clays, which are not presently exposed in the stratal sequence of the Fyledalen area. (Less)
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author
Ekström, Jonas
supervisor
organization
year
type
M2 - Bachelor Degree
subject
keywords
geologi, geografi, Skåne, Sweden, gastropods, ostracods, brackish water assemblages, Jurassic - Cretaceous boundary, bivalves, molluscs, Vitabäckslera
publication/series
Examensarbeten i geologi vid Lunds universitet
report number
9
language
Swedish
id
2371223
date added to LUP
2012-05-22 11:38:50
date last changed
2012-05-22 12:02:10
@misc{2371223,
  abstract     = {The Vitabäck clays, the Jurassic - Cretaceous transitionai beds in Sweden, contain brackish water faunas with close affinities to their counterparts in north-western Europe. The faunas are dominated by the bivalve genera Myrene and Neomiodon. There is no evidence for limnic or marine conditions, which previously has been assumed. The molluscan assemblages indicate somewhat differing salinity conditions. Assemblages dominated by Neomiodon indicate oligohaline to slightly mesohaline waters, and those dominated by Myrene and Ostrea indicate mesohaline to brachyhaline waters. Comparison with similar geological settings in north-western Europe, containing almost identical faunal assemblages, indicate that the main part of the Vitabäck clays is of Berriasian age (Early Cretaceous). The Jurassic - Cretaceous boundary is probably to be found in the lowermost parts of the Vitabäck clays, which are not presently exposed in the stratal sequence of the Fyledalen area.},
  author       = {Ekström, Jonas},
  keyword      = {geologi,geografi,Skåne,Sweden,gastropods,ostracods,brackish water assemblages,Jurassic - Cretaceous boundary,bivalves,molluscs,Vitabäckslera},
  language     = {swe},
  note         = {Student Paper},
  series       = {Examensarbeten i geologi vid Lunds universitet},
  title        = {Stratigrafisk och faunistisk undersökning av Vitabäckslerorna i Skåne},
  year         = {1985},
}