Figure F2. Permeability measurements as a function of confining pressure for samples with little response to pressure, increasing from a confining pressure of ~5 MPa to ~50 MPa and then decreasing to 5MPa. * = samples damaged during the permeability test.

Figure F2. Permeability measurements as a function of confining pressure for samples with little response to pressure, increasing from a confining pressure of ~5 MPa to ~50 MPa and then decreasing to 5MPa. * = samples damaged during the permeability test.