II. Sørfolden-Riksgrænsen

Abstract

The present paper is a text to the maps \"Sørfolden\" and \"Riddoalgge\" situated in Nordland between 67o20' and 67o40' N. The geological surveys were made during the summers of 1914, 15 & 16. The annexed map is a reduction to one half the size of the original maps. The region mapped by the author forms to the eastern part of the \"Kart over Kjærringø og Sørfolden\", accompanying this memoir. The stratified rocks show in the eastern part of the map a slightly undulating dip. Towards the West the strata become raised on edge, dipping North-easterly under the Sulitjelma schists. In the same direction the under- lying strata become more crystalline, while great granite laccolites commonly occur. In the strata of the mica-schist, marble-group, lying apparently lower a thick limestone formation occurs. This is the Fauske limestone including layers of beautiful marble which can be traced continously for several Nor- wegian miles towards the North-east. The thcikness of the Fauske limestone is about 800 m. It is to be considered as a section of the mighty limestone formation thatm with a few interrouptions, can be followed along the Nor- wegian coast from the Trondheim district to Tromsø.