 S. J. Mackwell

S. J. Mackwell investigates the mechanical behaviour of planetary materials through laboratory deformation experiments. His work on hot, dry rock connects measured stress and strain rate with the strength expected in the crust of Venus.^[ref]

Extrapolating a laboratory flow law to a planet requires the relevant temperature, composition and deformation regime. A single viscosity measured under one set of conditions therefore does not establish a universal crustal viscosity.