Summary
Petrographic and structural descriptions are presented of the different rock-types occurring within the area of map-sheet Arstaddal. The area investigated is situated in the Breiarn Nappe Complex in the Caledonides of Nordland. The rocks are divided into five units: Govddestinden Nappe, the Habresåga (Stabben) Nappe, the Sokumfjell Group, the Gråtådalen Group and the Stabbursdalen Group. The data show that there must be significant differences in age between the various units in the map-area and also that the units have different early deformational and metamorphic histories.
