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Dating littorina sea shore levels in Denmark on the basis of data from a mesolithic coastal settlement on skagens odde, northern Jutland

100%

Christensen C. , Nielsen A. B.

Polish Geological Institute Special Papers

2008

tom Vol. 23

27-38

The Mesolithic settlement site of Yderhede on Skagens Odde is interesting because it lies on Denmark’s highest Littorina coastline, 13 m above present-day sea level. The settlement was founded on peaty ground on the shore of a sheltered fjord. Pollen-analytical investigations have been carried out on marine/brackish gyttja deposits containing refuse from the settlement. These marine sediments were formed as a result of a transgression starting around 5300 cal. BC, reaching a maximum of 13 m above present sea level. Settlement took place during a subsequent regression and ceased in connection with a new Atlantic transgression. Subsequently, the lagoon silted up partly due to isostatic land upheaval of the area. The settlement lies on flat ground below the marked raised coastal cliff that runs from Frederikshavn to Hirtshals. The formation of this cliff has previously been assigned to the time of the Littorina Sea, but it is now suggested that it was formed in Late Glacial times. The two transgressions demonstrated here have been fitted into the overall pattern for sea-level change in Denmark. Subsequently, on the basis of well-dated sea-level curves for Southern Scandinavia, dates are given for the highest shore levels of the Littorina Sea. As a result of the interaction between increasing upheaval in a north-easterly direction and the general sea-level rise during the Littorina transgression, the maximum in the Gothenburg area (23 m isobase) occurs as early as 6300 cal. BC, whereas the maximum at the 0 m isobase in Southern Denmark first occurs around 3600 cal. BC.

Testate amoebae as proxy for water level changes in a brackish tidal marsh

84%

Ooms M. , Beyens L. , Temmerman S.

Acta Protozoologica

2012

tom 51

nr 3

Vulnerability assessment of Southern coastal areas of Iran to sea level rise: evaluation of climate change impact

84%

Goharnejad H. , Shamsai A. , Hosseini S. A.

Oceanologia

2013

tom 55

nr 3

Sea level variability in the eastern part of the Polish Baltic Sea coast 1975-2004

84%

Marosz K. J. , Jakusik E.

Geographia Polonica

2010

tom 83

nr 1

Frasnian-Famennian extinction and recovery of rhynchonellid brachiopods from the East European Platform

67%

Sokiran E. V.

Acta Palaeontologica Polonica

2002

tom 47

nr 2

In contrast to dramatic losses of the Atrypida and Pentamerida at the Frasnian–Famennian boundary, the Rhynchonellida demonstrated relatively high rate of survival, and recolonized vacated benthic ecospace after the F–F extinction events. The Late Devonian evolution of rhynchonellid faunas from the East European Platform shows three distinctive periods of their mass appearance. High abundance of rhynchonellids is characteristic for early–middle Frasnian (Palmatolepis transitans–Pa. punctata zones) and early Famennian (Pa. crepida Zone). Invasion of taxonomically diverse and rich rhynchonellid faunas usually corresponds to the major transgressive episodes, whereas decline coincides with regressive conditions of the basin. Rhynchonellid assemblages were replaced in the late Frasnian (Late Pa. hassi–Pa. linguiformis zones) by theodossiid− and cyrtospiriferid−dominated assemblages, which occupied habitats in newly expanding marine environments. The extinction of theodossiids at the end of the Frasnian and the next transgressive episode possibly stimulated an expansion of rhynchonellids. The early Frasnian species Ripidiorhynchus livonicus (Buch, 1834), and the early Famennian R. huotinus (Verneuil, 1845) and R. griasicus (Nalivkin, 1934) are revised. Early Famennian species Paromoeopygma koscharica (Nalivkin, 1934) from the central region is redescribed. Ripidiorhynchus chencinensis sp. nov. from the latest Givetian of Poland, as well as Globulirhynchia minima sp. nov. from the late Frasnian of the central region of the Russia, are described.