. Vine's PhD thesis was on 'Magnetism in the Seafloor' and supervised by
Drummond Matthews. Having met
Harry Hess he was aware of
sea floor spreading, where the ocean bed acts as a 'conveyor belt' moving away from the central ridge. Vine's work, with that of
Drummond Matthews and
Lawrence Morley of the
Geological Survey of Canada, helped put the variations in the magnetic properties of the
ocean crust into context in what is now known as the
Vine–Matthews–Morley hypothesis. Specifically they supported
Dietz's (
Nature 1961) idea that sea floor spreading was occurring at
mid-ocean ridges. Vine and Matthews showed that
basalt created at a mid-ocean ridge records earth's current magnetic field polarity (and strength), thus turning Hess's theoretical 'conveyor belt' into a 'tape recorder'. can be seen as parallel strips as you travel perpendicularly away from the ridge crest. ==Academic career==