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    Wyświetlanie 1-6 z 6
    Tytuł:
    Age and evolution of the Littorina Sea in the light of geochemical analysis and radiocarbon dating sediment of cores from the Arkona Basin and Mecklenburg Bay (SW Baltic Sea)
    Autorzy:
    Kostecki, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/295074.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Geomorfologów Polskich
    Tematy:
    geochemistry
    radiocarbon dating
    Ancylus Lake
    Littorina Sea
    southwestern Baltic Sea
    Opis:
    Two sediment cores from the Mecklenburg Bay and Arkona Basin were analysed in terms of their geochemical composition and stratigraphy. The main stages of the Baltic Sea evolution – Baltic Ice Lake, Ancylus Lake, and Littorina Sea – were identified in both analysed cores. The most pronounced period was the transition between the Ancylus Lake and the Littorina Sea. The character of the initial stage of the Littorina Sea was clearly defined in the Mecklenburg Bay sediments and is marked by a stepwise increase in loss on ignition and contents of biogenic silica, calcium, magnesium, iron, and strontium. The record of the onset of the Littorina Sea in the Arkona Basin sediments is marked by an abrupt change of the geochemical parameters. The age of the initial Littorina Sea in the Mecklenburg Bay was estimated at about 8200 cal years BP and was probably older than the transgression within the Arkona Basin.
    Źródło:
    Landform Analysis; 2015, 29; 27-33
    1429-799X
    Pojawia się w:
    Landform Analysis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evolution of Arkona Basin environment in the Holocene in the light of diatom research
    Autorzy:
    Janczak-Kostecka, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/294470.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Geomorfologów Polskich
    Tematy:
    diatoms
    Mastogloia Sea
    Ancylus Lake
    Littorina Sea
    southwestern Baltic Sea
    Arkona Basin
    Opis:
    This article presents the results of diatom studies from three cores taken from the Arkona Basin. The main stages of the Baltic Sea evolution in the Holocene – Ancylus Lake, Mastogloia Sea, Littorina Sea, and Post-Littorina Sea – were identified in diatom assemblages. The transition stage between Ancylus Lake and Littorina Sea, called Mastogloia Sea, was not such a long period as in the Mecklenburg Bay but was essential in the evolution of the Baltic Sea. The most pronounced feature of this period was an increase in the number of halophilous species, which reflected the existence of the littoral environment at the onset of this stage. The appearance and development of halophilous species was stimulated by stepwise inflows of saline waters. The composition of diatom assemblages reflected natural eutrophication of the Baltic Sea during the Littorina Sea stage.
    Źródło:
    Landform Analysis; 2015, 29; 19-25
    1429-799X
    Pojawia się w:
    Landform Analysis
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diatomological and geochemical evidence of littorina transgression in Pomeranian Bay, Southern Baltic Sea
    Autorzy:
    Kostecki, Robert
    Janczak-Kostecka, Beata
    Powiązania:
    https://bibliotekanauki.pl/articles/2026722.pdf
    Data publikacji:
    2010
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    diatoms
    geochemistry
    Littorina transgression
    Pomeranian Bay
    southern Baltic Sea
    Opis:
    This ar ti cle pres ents re sults of the anal y sis of 3 sed i ment cores taken from the bot tom of Pom er a nian Bay, south ern Bal tic Sea. These re sults are part of a larger pro ject that aims to de ter mine the char ac ter is tics and rate of the At lan tic ma rine ingression in the Pom er a nian Bay area. The main geo chem i cal el e ments and di a tom as sem blages from the cores were iden ti fied, re veal ing lac us trine sed i ments de pos ited dur ing the time of Ancylus Lake and ma rine sed i ments de pos ited dur ing the Littorina trans gres sion. Dis tinct changes in the geo chem i cal com po si tion and di a tom as sem - blages sug gest that the Littorina trans gres sion had a very large im pact on the en vi ron ment of Pom er a nian Bay.
    Źródło:
    Studia Quaternaria; 2010, 27; 27-33
    1641-5558
    2300-0384
    Pojawia się w:
    Studia Quaternaria
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An attempt to resolve the partly conflicting data and ideas on the ancylus-littorina transition
    Autorzy:
    Björck, S.
    Andrén, T.
    Bo Jensen, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1204980.pdf
    Data publikacji:
    2008
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    sea level
    Ancylus Lake
    Littorina Sea
    Baltic Sea
    Opis:
    Lagoon gyttja layers occurring in anomalously high position (up to 2.5 m above the present-day sea level) The transition phase between the Ancylus and Littorina stages of the Baltic Sea is an old controversial topic. With the newest data available we try to reach a compromise between the "dramatic" model, including a sudden and large drainage of the Ancylus Lake, and the idea of a non-existing Ancylus drainage through Denmark. This new model includes a minor, perhaps 5 m, sudden erosion and forced regression slightly before 10,000 cal. yrs BP. This was followed by a 200–300 yr long period when the outlet through Denmark and Great Belt (Dana River) was characterized by a variable fluvial environment creating fluvial, levée and lacustrine deposits. During this period of rapidly rising sea level, we postulate that the gradient between the Ancylus Lake and sea level gradually decreased from some 5 m until sea level had reached the Ancylus and Darss Sill level. After this point in time occasional pulses of marine water could easier enter into the Baltic basin, which is seen as brackish pulses as early as 9800 cal. yrs BP in records from the Bornholm and Gotland basins, but also from Blekinge. It would, however, take another c. 1500 years before the Öresund threshold was flooded by the rising sea level, causing a significant rise in salinity sometime between 8500–8000 cal. yrs BP, and marking the true onset of the Littorina Sea.
    Źródło:
    Polish Geological Institute Special Papers; 2008, 23; 21-26
    1507-9791
    Pojawia się w:
    Polish Geological Institute Special Papers
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dating littorina sea shore levels in Denmark on the basis of data from a mesolithic coastal settlement on skagens odde, northern Jutland
    Autorzy:
    Christensen, Ch.
    Nielsen, A. B.
    Powiązania:
    https://bibliotekanauki.pl/articles/1205003.pdf
    Data publikacji:
    2008
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    Littorina transgression
    sea-level change
    shorelines
    Mesolithic coastal cultures
    pollen analysis
    Holocene
    Opis:
    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.
    Źródło:
    Polish Geological Institute Special Papers; 2008, 23; 27-38
    1507-9791
    Pojawia się w:
    Polish Geological Institute Special Papers
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Littorina Sea at the Lithuanian Maritime Region
    Autorzy:
    Bitinas, A.
    Damušyte, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/1187359.pdf
    Data publikacji:
    2004
    Wydawca:
    Państwowy Instytut Geologiczny – Państwowy Instytut Badawczy
    Tematy:
    coastline
    transgression
    neotectonic
    Littorina Sea
    Post-Littorina Sea
    Opis:
    In the recent decade a number of data of different investigations (pollen, diatom, molluscs analysis, lithological investigations, dating by methods of absolute geochronology, etc.) have been collected during the large-scale geological mapping of Lithuanian Maritime region (Lithuanian Coast). The results of investigations confirmed that there were three Littorina Sea transgressions at the Lithuanian Coast: the first manifested approximately in 8500-7800 conventional 14C years BP, the second (maximal) - in 6200-5900 and the third - in 5300-4000 conv. 14C years BP. The Post-Littorina Sea maximum was in about 3600-3400 conv. 14C years BP. The Littorina Sea shoreline displacement curves were carried out. The present-day positions of shorelines of the Littorina Sea as well as other Baltic basins are displaced in different altitudes in separate parts of the Lithuanian Coast due to oscillatory neotectonic movements of Earth crust blocks during Late Glacial and Holocene.
    Źródło:
    Polish Geological Institute Special Papers; 2004, 11; 37-45
    1507-9791
    Pojawia się w:
    Polish Geological Institute Special Papers
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-6 z 6

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