Tombs, J.M.C.. 1980 Results of a gravity survey of the south-west margin of Dartmoor, Devon. Institute of Geological Sciences, 19pp. (WF/MR/80/034) (Unpublished)
A gravity survey (station density 4-6 per km2) of the south-western
margin of Dartmoor, including the Hemerdon stockwork, was interpreted
using previously developed computer techniques, with some refinements,
to indicate the depth to buried granite. The results showed (i) that
the Hemerdon Ball granite is an isolated block and does not extend to
depth, and (ii) that no vertically-continuous shallow granite occurs
at any distance from the known outcrop. Various computer-graphics
presentations of the data are given.
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