We present experimental evidence that pressure solution creep does not
establish a steady-state interface microstructure as previously thought.
Conversely, pressure solution controlled strain and the characteristic
length scale of interface microstructures grow as the cubic root of
time. Transient creep with the same scaling is known in metallurgy
(Andrade creep). The apparent universal scaling of pressure solution
transient creep is explained using an analogy with spinodal dewetting.