The geology of the Fjeldheim-Gåsbakken area, Sør-Trøndelag.
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The geology of an area south of Trondheim is described and a geological map is presented. This area has not been studied in detail before. Rocks of the Støren Group and the Lower Hovin Group are exposed. The latter group is devided into the basal Fjeldheim Conglomerate, the Fjeldheim Beds and the Nyplassen Beds. The graptolitic Bogo Shale and equivalents of the Hølonda Limestone are included within the Fjeldheim Beds. The Hølonda Porphyrites are shown to be intrusive sill-like bodies in this area. A stratigraphical correlation with the adjacent Hølonda-Horg district is given.