A comment on a gravity interpretation of the Horg area in the Trondheim Region, Norwegian Caledonides

The principal structure of the Horg area is a regional NNE-SSW trending fold which is usually regarded as a syncline (the Horg Syncline). A modified synclinal model based on interpretation of Bouguer gravity data has recently been proposed. In the new synclinal model a hypothetical fault with ca. 10 km downthrow of the western flank had to be introduced to fit the gravity data. Geological field evidence of this huge fault is feeble. When the regional gravity field is taken into account the gravity data from the Horg area fit an anticlinal model hetter than the proposed new synclinal version.