Assertion: glacier's ice | /r/CapableOf | support a basal shear stress
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text: This uniform driving stress is due to the rheology of ice; ice deforms through non-linear viscous flow, with an effective viscosity that allows ice to support a basal shear stress (τ d ) of approximately 105 Pa. Glaciers thicken until they reach stresses of this magnitude, and further thickening or steepening leads to increased flow and thinning (Marshall et al., 2011).