Browsing Artikler by Subject "GEOKRONOLOGI"
Now showing items 21-40 of 82
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Diatom stratigraphy related to Late Weichselian sea-level changes in Sunnmøre, Western Norway.
(NGU (380), Journal article, 1983)In sediment cores from four small basins from 44 to 26 m above sea-level, the boundaries between marine, brackish and lacustrine sediments are precisely identified through their distinct diatom stratigraphy. In all basins ... -
Early Ordovician ages of zircons from felsic rocks and a conglomerate clast, Frosta peninsula, Central Norwegian Caledonides
(NGU Bulletin (450), Journal article, 2010)Zircons extracted from a felsic sheet in the bimodal, magmatic, Fånes complex of the Støren Nappe on Frosta peninsula yielded a U-Pb age of 488 \u00B1 5 Ma, interpreted as the age of crystallisation. A large clast of ... -
Eemian and Weichselian deposits at Bø on Karmøy, SW Norway: a preliminary report.
(NGU (380), Journal article, 1983)Lithological and biostratigraphical studies, including studies of pollen, foraminifera and molluscs, together with amino acid analysis, radiocarbon datings and Uranium-Thorium datings of the deposits in a 21 m section with ... -
Einergrein av Preboreal alder funnet i israndavsetning i Eidfjord, Vest-Norge.
(NGU (266), Journal article, 1970)In 1969 a branch of juniper (Juniperus communis) was found in a sand-pit on the ice marginal delta in Eidfjord, West-Norway. Radiocarbon dating gave an age of 9680\u00B190 years B.P., which means that the delta is Preboreal ... -
Elvdal. Beskrivelse til kvartærgeologisk kart 2018 III - M 1:50 000 (med fargetrykt kart)
(NGU; Skrifter (346 ; 27), Journal article, 1979)The superficial deposits consists mainly of sandy basal till\r and gravelly-sandy ablation till. The glaciofluvial and fluvial\rsediments are mainly gravelly. The lithology of the fine gravel and the\r mineralogy of sand ... -
En geologisk undersøkelse på den sørøstre del av kartbladet Salangen.
(NGU (234), Journal article, 1965)Petrographic and structural investigations were made in a Cambro-Ordovician area of the Caledonides of Northern Norway, situated in Salangen, Troms. The rocks, mainly mica schists rich in biotite and\/or muscovite, are ... -
En petrografisk-mineralogisk undersøkelse i området syd for Majavann, spesielt granaters sammensetning under regional metamorfose.
(NGU (234), Journal article, 1965)The investigated area is situated in the Norwegian Caledonian orogenic belt, south of Majavann (Nordland county). The main rock types are micagneisses and garnet-mica-schists, cristalline limestones, granodioritic-gneisses, ... -
Fjellkjedestudier i den østlige del av Troms.
(NGU (248), Journal article, 1967)In 1915, Thoralf Vogt tavelled along the eastern margin of the Caledonian mountain range from Tornetr\u00E4sk in Norrbotten through Troms (Norway) and the adjacent regions of Sweden and Finland to Nordreisa (in the ... -
Gabbroic and quartz dioritic intrusions in gneisses on southern Askøy, West Norwegian Caldonides.
(NGU (270), Journal article, 1971)Light- and dark-coloured biotite gneisses and in part amphibole gneisses, of supracrustal origin have been intruded by a Precambrian basic pluton. Later a quartz diorite was intruded into the basic rocks. By assimilation ... -
Geochemistry and petrology of dolerite dykes of probable late Caledonian age from the outer Sunnfjord region, West Norway.
(NGU (363), Journal article, 1981)Major and trace element abundances from dolerite dykes in the outer Sunnfjord region show an averall compositional similarity to continental tholeiites. The dyke rocks exhibit a fractionated nature, especially with respect ... -
Geochemistry and Rb-Sr dating of the Muruvik rhyolite tuff, Trondheimsfjord, Central Norway.
(NGU Bulletin (412), Journal article, 1988)A geochemical study of a low greenschist facies, felsic lapill-ash tuff fromnear the stratigraphic top of the Ordovician Lower Hovin Group at Muruvik,Trondheimsfjord, has shown that the pyroclastite is clearly calc-alkaline ... -
Geochemistry of dolerite and metadolerite dykes from Varanger Peninsula, Finnmark, North Norway.
(NGU (322), Journal article, 1975)Dolerite dykes provide the only manifestation of igneous activity in the thick, Riphean to Lower Cambrian, weakly metamorphosed sedimentary sequence of Varanger Peninsula. Major and trace element abundances and ratios from ... -
Geological note: Age of the Hamningberg dolerite dyke, Varanger Peninsula, Finnmark: Devonian rather than Vendian - a revised enterpretation
(NGU Bulletin (451), Journal article, 2011)In an earlier geochronology paper in this same journal, discordant U-Pb ages on zircons from a dolerite dyke near Hamningberg, Varanger Peninsula, Finnmark, were interpreted to favour a Vendian (Ediacaran) age of intrusion ... -
Geology and structure of the area west of Fyresvatn, Telemark, southern Norway. The Precambrian rocks of the Telemark area in South Central Norway no. X.
(NGU (268), Journal article, 1970)Geological mapping has shown that the area west of Fyresvatn, Telemark, Southern Norway, is underlain by a sequence of gneisses, quartz schists, amphibolites, migmatites and epidote bearing quartzite, together with a ... -
Geology and structure of the Dombås-Lesja area, southern Trondheim region, south-central Norway.
(NGU (340), Journal article, 1978)Investigations in the southernmost part of the Trondheim region have established the presence of a new tectonic unit, the Andbergshøi Complex, interposed between the Trondheim Nappe and the Western Precambrian basement. ... -
Geology of the Altenes area, Alta-Kvænangen window, North Norway.
(NGU (351), Journal article, 1979)Precambrian supracrustal and intrusive rocks of the Raipas Group of supposed Karelian age are unconformably overlain by Vendian to ?Lower Cambrian sedimentary rocks, which have in turn been overridden by allochthonous rocks ... -
Geology of the Røssjøkollan-Dokkvatn area, Oppland.
(NGU (314), Journal article, 1974)The Røssjøkollan-Dokkvatn area at the eastern edge of Valdres Sparagmite exposures is comprised of a number of allochthonous litho-tectonic units in which Precambrian Jotun basement, and Late Precambrian or Eocambrian ... -
Glacial geology of the area between Jostedalsbreen and Jotunheimen, South Norway.
(NGU (291), Journal article, 1973)Ice movement and the course of deglaciation are reconstructed. The age of and the climate during the deglaciation are discussed in the light of equilibrium line displacement, shoreline positions, pollen analysis and ... -
Harstad. Beskrivelse til det berggrunnsgeologiske gradteigskart M 8 - 1:100 000 (med fargetrykt kart)
(NGU; Skrifter (309; 14), Journal article, 1974)From a structural point of view the bedrocks of the map area can be subdivided into 1. Precambrian basement (autochthonous), and 2. Allochthonous Caledonian units. The Caledonian sequence embraces a) The lowermost over-thrust ... -
Intrusive rocks of the northern Iveland-Evje area, Aust-Agder.
(NGU (322), Journal article, 1975)In the northern Iveland-Evje area extensive magmatic activity occurred during the so-called Sveconorwegian igneous period. Two intrusive episodes can be distinguished through apparently they occurred close in time. The ...