Pietinės Norvegijos kaledonidai Sognės fiordo skerspjūvyje
The greatest stimulus for the beginning of Norwegian geology was the presence of especially large variety of geological structures. Oslo is situated within the zone known as the Oslo Graben or Christiania Area, were sedimentary Palaeozoic fossil-rich deposits occur, mainly Permian, volcanic rocks an...
| Main Authors: | , |
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| Format: | Article in Journal/Newspaper |
| Language: | Lithuanian English |
| Published: |
2009
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| Subjects: | |
| Online Access: | http://lsmu.lvb.lt/LSMU:ELABAPDB5830273&prefLang=en_US |
| Summary: | The greatest stimulus for the beginning of Norwegian geology was the presence of especially large variety of geological structures. Oslo is situated within the zone known as the Oslo Graben or Christiania Area, were sedimentary Palaeozoic fossil-rich deposits occur, mainly Permian, volcanic rocks and rather abundant Quaternary glacial deposits laid in different forms of the relief. The Christiania (now Oslo) University Professor Jens Esmark (1762-1839), who had published in 1824 his research material showing that Norway had been covered by ice (Sundquist et al., 2008) made history among the pioneers supporting and propagating the theory of continental glaciations. The Quaternary glaciations, especially in west Norway, created a wonderful landscape with a great variety of glacial relief forms (Fig. 1), the most impressive of which are the Norwegian fjords with their depth reaching more than one kilometre, while the depth of glacial exaration is even at 2 km below the sea level. The fjords playing the role of ice stream drain arteries become the incisions reaching the depths of 400-500 m in the shelf zone; and the fjord mouths there are large glacial deposits left after a glacier melted. The South Norwegian Caledonide structure seen in the Sognefjord section crossing the Lower and Middle Caledonian mountain chain in the south of Norway provides a wonderful illustration of the Alpine orogeny. |
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