Blar i NGU Open Archive på forfatter "Oftedahl, Christoffer"
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Jomaforekomstenes blokkvifter.
Oftedahl, Christoffer (NGU (200), Journal article, 1957)The Joma pyrite occurence contains some 15 million tons ore and crops out mostly under bogs with maximum ore zonewidth of 40 m. The surrounding morainic deposits have been investigated for ore boulders, in order to find ... -
Note on a molybdenite-dolomite-bearing pegmatite in Velfjord, Nordland, Norway.
Oftedahl, Christoffer (NGU (247), Journal article, 1967)A small area of basic gabbro occurs within the granodiorite pluton noth of Velfjord. In this gabbro was found a peculiar pegmatite dike, rich in molybdenite, and composed of quartz, albite, and dolomite as major minerals. -
Note on gel structures in a pyrite bed, the Grong district.
Oftedahl, Christoffer (NGU (205), Journal article, 1959)I en kisblokk som ble funnet ved NGU's blokkleting vest for Tunnsjøen i Grongfeltet forekommer det gelstrukturer, se fig. 1 og 2. Slike strukturer anses i alminnelighet å tyde på syngenetisk dannelsesmåte, og de bekrefter ... -
Om sparagmiten og dens skyvning innen kartbladet Øvre Rendal.
Oftedahl, Christoffer (NGU (161), Journal article, 1943)This paper presents some of the results from the geological mapping of \"Øvre Rendal\". The field work was carried out in the course of 14 weeks, divided on three summers: 1939-1941. Deserving special mentioning for work ... -
Oversikt over Grongfeltets skjerp og malmforekomster.
Oftedahl, Christoffer (NGU (202), Journal article, 1958)Ore occurences of the Grong area: In the period 1910-1918 a great number of ore occurences were discovered in the Grong area. The late state geologist Steinar Foslie mapped the area in the years 1922-1931. Foslie also ... -
Storisens transport av kisblokker fra Joma.
Oftedahl, Christoffer (NGU (203), Journal article, 1958)For three summers the Geological Survey of Norway has carried out a special hunt of pyrite boulders within the Grong area and adjacent districts. One result is the establishement of a marked boulder train from the Joma ... -
The Caledonian Basement. Reply to Per Holmsen.
Oftedahl, Christoffer (NGU (234), Journal article, 1965) -
The nature of the basement contact.
Oftedahl, Christoffer (NGU (227), Journal article, 1964)The gneisses below the Cambrian schist or Eocambrian flagstones in the central Norwegian Caledonides have been considered of Precambrian age, but the fact that the contact is always concordant has been explained as due to ... -
The Oslo paleorift - A review and guide to excursions. Excursion 6. Southern part of the Oslo Rift.
Oftedahl, Christoffer; Petersen, Jon S. (NGU (337), Journal article, 1978) -
Øvre Rendal. Beskrivelse til det geologiske rektangelkart.
Holmsen, Gunnar; Oftedahl, Christoffer (NGU (177), Journal article, 1952)