The Inner Moray Firth Central Ridge, a geophysical interpretation

Synopsis The Institute of Geological Sciences has acquired gravity, multichannel seismic and aeromagnetic data covering the Inner Moray Firth sedimentary basin. The seismic data reveal a Permian-Cretaceous sequence up to 5 km thick, in which the deposition was fault controlled. With the help of well data, the gravity effect of the sediments is removed to leave a residual anomaly of approximately −23 mGal. Once corrected for regional effects, this anomaly is interpreted in terms of a Devonian (Old Red Sandstone) basin and an underlying granite. The presence of the latter is consistent with magnetic data and may be the cause of an uplift in the centre of the basin.