A review of the experimental evidence suggests that creep in brittle rock at low temperature is due to time-dependent cracking. A transient creep law is derived from the mechanism of time-dependent cracking in an inhomogeneous brittle material. The behavior is described as a Markov process with a stationary transition probability that is obtained from experimental observations of static fatigue in glasses. The model is compared with experimental observations and found to predict the observed stress dependence of creep.
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Christopher H. Scholz (1968) studied this question.
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