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http://yadda.icm.edu.pl:80/baztech/element/bwmeta1.element.baztech-article-BUS6-0014-0007

Czasopismo

Geological Quarterly

Tytuł artykułu

Streamlined topographical features in and around the Gulf of Riga as evidence of Late Weichselian glacial dynamics

Autorzy Tsyrulnikov, A.  Tuuling, I.  Hang, T. 
Treść / Zawartość http://gq.pgi.gov.pl/gq
Warianty tytułu
Języki publikacji EN
Abstrakty
EN Based on various cartographic sources, a digital terrain model and acoustic profiling data, linear relief features of glacial origin have been distin guished and analysed in the Gulf of Riga and adjacent mainland areas in order to reconstruct the dynamics and pathways of former ice streams. North-east–south-west oriented features in the till topography prevail in the central part of the gulf and along the southern coast of the island of Saaremaa, which corroborate the previously known south/south-east di rection of the main Riga ice stream. North-east to south-west directed features dominate in the Pärnu Bay and around the Irbe Strait. Similar deviations from the Riga ice stream are most likely due to ice divide zones, namely the Sakala Upland in Southern Estonia and Kurzeme in north western Latvia, which locally changed the course of the main ice flow. The influence of the Kurzeme ice divide is traceable at the bottom of the gulf up to the southern coast of Saaremaa. There is no evidence of an ice-marginal zone cross ing the central part of the Gulf of Riga as was supposed earlier. The Pandivere-Neva and Palivere ice-marginal zones, which merge on the Sorve Peninsula, probably continue offshore into the Irbe Strait. As the age of the glacier relieffeatures is poorly contained, the chronologi reconstruction of the ice dynamics is tentative.
Słowa kluczowe
EN Gulf of Riga   Baltic Sea   Late Weichselian glaciation   Riga ice stream   glacial topography   bottom relief  
Wydawca Państwowy Instytut Geologiczny - Państwowy Instytut Badawczy
Czasopismo Geological Quarterly
Rocznik 2008
Tom Vol. 52, No 1
Strony 81--81
Opis fizyczny –89, bibliogr. 42 poz., rys., tab.
Twórcy
autor Tsyrulnikov, A.
autor Tuuling, I.
autor Hang, T.
  • Institute of Geology, University of Tartu, Vanemuise 46, 51014 Tartu, Estonia, arkadyts@ut.ee
Bibliografia
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