Blar i NGU Open Archive på emneord "PALEOZOIKUM"

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    • Geologien på søndre del av kartblad Essandsjø. 

      Bryn, Knut Ørn (NGU (205), Journal article, 1959)
      The field observations were made during 1955 and 1956. The most important types of rocks are as follows. Near the SE corner of the map there is granite surrounded by quartz porphyry. This is overlain by another porphyry, ...

    • Geologiske og petrografiske undersøkelser i området Tynset-Femunden. 

      Holmsen, Per (NGU (158), Journal article, 1943)
      The present paper is a description of the geology and petrology of the map quadrangle 38 C, Tynset, in southern Norway. Within the map Tynset we find the border between the large S.E.-Norwegian sparagmite area and the ...

    • Geologiske undersøkingar på Frøya og Froøyane. 

      Nordgulen, Øystein; Sundvoll, Bjørn; Bøe, Reidulv; Solli, Arne (NGU-Rapport (90.073), Report, 1990)
      Kartlegging på Frøya og Froøyane har vist at berggrunnen for det meste er samansatt av kaledonske intrusivar som i nokre område innheld xenolittar av metasedimentere bergarter med ukjend alder. På Frøya og i ein del område ...

    • Geology of the Fosen Peninsula and Trondheimsfjord Region: a synopsis and excursion guide. 

      Roberts, David (NGU-Rapport (98.119), Report, 1998)
      In the first part of the report, a synopsis is presented of the general geology and tectonostratigraphy of this part of Central Norway, with a slightly more detailed account given of the geology of Fosen Peninsula. The ...

    • Grunnfjellsvinduer i Dividalen, Troms. 

      Gustavson, Magne (NGU (223), Journal article, 1963)
      Two small windows of Precambrian granites were investigated during a few days the summer 1962. Above the granites there follow autochtonous rocks of the Hyolithes Zone, of Lower Cambrian age. On the autochtonous rocks rests ...

    • Hyolithus-sonens basale lag i Vest-Finnmark. 

      Holmsen, Per (NGU (195), Journal article, 1956)
      The basal layers of the \"Hyolithus-zone\" in western Finnmark: The \"Hyolithus- zone\" is a term which has been attached to the autochtonous Cambrian substratum of the Caledonides which can be followed from Laksefjord in ...

    • Isotope geochronology of the Eidfjord Granite, Hardangervidda, West Norway. 

      Priem, Harry N.A.; Verschure, R.H.; Verdurmen, E.A.Th.; Hebeda, E.H.; Boelrijk, N.A.I.M. (NGU (327), Journal article, 1976)
      The Eidfjord Granite has a 7-point whole-rock Rb-Sr isochron age of 931 +- 35 Ma with initual 87Sr\/86Sr = 0.7058 +- 0.0028 (50.0 X (10)9 year 87Rb half life; errors at 95 per cent confidence level). Two separated biotites ...

    • Lithostratigraphy and facies analysis of the Ringerike group of the Oslo region. 

      Turner, P. (NGU (314), Journal article, 1974)
      The Ringerike group is a late Silurian red bed succession confined to the Oslo Graben of southern Norway. At Ringerike, the type area, it contains the Sundvollen Formation (500 m) below and the Stubdal Formation (750 m). ...

    • Namsvatnet med en del av Frøyningsfjell. 

      Strand, Trygve; Foslie, Steinar (NGU (196), Journal article, 1956)
      The rocks of the area can be divided into three sharply separated groups. These are in ascending tectonic order: 1. The Børgefjell Massif in the north-eastern part of the area. 2. A complex of low-grade metamorphic sediments ...

    • New fossil finds from the Cambro-Silurian meta-sediments on Hardangervidda. 

      Andresen, Arild (NGU (304), Journal article, 1974)
      The occurrence of Actinoceroid cephalopods (Ormoceras(?) sp.), brachipods (Orthis ss.), and trilobites (Ptychopyge sp.) in a crystalline limestone overlying bluish quartizite on Hardangervidda indicates that Orthoceras ...

    • Noen stratigrafiske aldersspørsmål i Grong-feltet og den sydøstlige del av Helgeland. 

      Strand, Trygve (NGU (223), Journal article, 1963)
      Some years ago the present writer described the geology and stratigraphy of the district along the Swedish border between 64 50' and 60 45' N (Strand 1953, 1955, Foslie og Strand 1956). In these districts and in adjacent ...

    • Om Grongkulminasjonen og Grongfeltets skyvedekker. 

      Oftedahl, Chr. (NGU (195), Journal article, 1956)
      On the Grong culmination and the thrust nappes of the Grong area: This paper presents of the major tectonic features of a central part of the Caledonides of Norway, based upon the very detailed and exact geological manuscript ...

    • On the tectonic relations of the Devonian complex of the Røragen area, East Central Norway. 

      Holmsen, Per (NGU (223), Journal article, 1963)
      In 1961, by chance, the author observed strata within the Devonian complex at Røragen. As the complex was earlier believed to be faulted only, the athor revisited the area in 1962. In the present paper the field relations ...

    • Otta-dekket og Valdres-gruppen i strøkene langs Bøverdal og Leirdalen. 

      Strand, Trygve (NGU (228), Journal article, 1964)
      In his 1951 paper (Strand, 1951) the writer described the Otta nappe (lower Jotun nappe). The nappe was mapped in the Vågå map area, extending west to the meridian 2 dgrs. west of Oslo. It is here a thin and discontinous ...

    • Palaeoproterozoic magnesite-stromatolite-dolomite-"red beds"assocation, Russian Karelia: palaeoenvironmental constraints on the 2.0 Ga positive carbon isotope shift. 

      Melezhik, V. A.; Makarikhin, V.V.; Medvedev, P. V.; Fallick, A. E. (NGU-Rapport (99.052), Report, 1999)
      Forkortet The ca. 2000 MA Tulomozerskaya Formation, Russian Karelia, representests the most 13C-rich carbonates (up to +18%)which have ever been reported. The implication of this excursion for our understanding of the ...

    • Reconnaisance of the Tømmerås Anticline. 

      Peacey, Janet Springer (NGU (227), Journal article, 1964)
      A granitic basement dome, overlain with unconformity by Palaeozoic and perhaps Eocambrian rocks, is described. The flat-lying \"leptites\" and intercalated sediments, which comprise the basement, were little affected by ...

    • Regional similarities in the distribution of well yield from crystalline rocks in Fennoscandia 

      Gustafson, Gunnar; Morland, Geir; Banks, David; Mäkelä, Jorma; Gundersen, Pål (NGU Bulletin (450), Journal article, 2010)
      Well yields from Precambrian and Palaeozoic bedrock in Norway, Sweden and Finland exhibit very similar and approximately log-normal distributions: all three data sets exhibit a median yield of 600-700 L hr-1, despite the ...

    • Relasjonen mellom senkaledonsk tektonikk og sedimentasjon ved Hornelens og Håsteinens devon. 

      Bryhni, Inge (NGU (223), Journal article, 1963)
      The Old Red in western Norway form very thick \"molasse\" deposits. The Håsteinen district is made up of coarse breccia with an estimated thickness of more than 1000 m and the Hornelen district has mainly sandstone with ...

    • Røros. Beskrivelse til kvartærgeologisk landgeneralkart 

      Holmsen, Gunnar (NGU (198), Journal article, 1956)
      The present map, dealing with the quarternary deposits of Røros, is partly based on existing maps of a larger scale, certain of which have been published. Areas not geologically mapped beforehand were surveyed in the susal ...

    • Some geophysical profiles in Østfold. 

      Lind, G.; Saxov, S. (NGU (266), Journal article, 1970)
      Based on detailed observations three profiles are examined, the profiles running some 20 km west-east from Jeløya, Østfold fylke. The magnetic values are taken from maps published by NGU. Geological samples have been ...