Basal mechanics of Ice Stream B , West Antarctica 1 . Till mechanics

  title={Basal mechanics of Ice Stream B , West Antarctica 1 . Till mechanics},
  author={Slawek M. Tulaczyk and W. Barclay Kamb and Hermann F. Engelhardt},
Data from laboratory geotechnical tests on till recovered from beneath Ice Stream B, West Antarctica, at the Upstream B camp (hereinafter the UpB till) show that failure strength of this till is strongly dependent on effective stress but is practically independent of strain and strain rate. These data support use of a Coulomb-plastic rheology in modeling of ice stream behavior and subglacial till deformation. Our testing program combined triaxial, ring shear, and confined uniaxial tests to… CONTINUE READING
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