Abstract
Summary Gravity interpretations suggest that the Cornubian granite batholith continues WSW from Land’s End as far as 8°W, and that the Haig Fras granite is part of a separate, parallel batholith. South-east of the Cornubian batholith there is a zone where seismic sections show dipping reflectors which may be thrusts. The axis of the Cornubian batholith is displaced dextrally between the Scilly Isles and Land’s End. There are dextral displacements of the axes of the Cornubian batholith and of the Haig Fras batholith at about 7°W, and on the line of these two displacements is an intrusion of high density. A deep horizontal reflector underlies the Cornubian batholith near the Scilly Isles.
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