There is provided a method and apparatus for determining resistivity in a
formation surrounding a borehole. In one embodiment, the apparatus
includes a magnetic resonance well logging tool disposed on said borehole,
the magnetic resonance well logging tool producing a magnetic resonance
sensitive volume thereabout, and a detector that selectively measures
current flow in the formation both perpendicular to and parallel to the
borehole axis within and adjacent to the sensitive volume.