Field investigations of the mode of flow of Meserve Glacier consisted of 3 major phases: 1) the surface strain field, derived from a triangulation network, 2) the basal strain field obtained by boring into a tunnel deformation, and 3) the internal strain field obtained by surface to bedrock boring. A summary of phase 3 gives surface, temperature, and deformation profiles, and borehole locations, from whicih it appears that longitudinal compression dominates deformation at depths above 20m and that simple shear dominates deformation at depths above 20m and that simple shear dominates deformation at depths below 20m. Temperature curves approximately superimpose for an adiabatic lapse rate of about 1 degree C per 100m elevation.