Fig. 9From: Strength models of the terrestrial planets and implications for their lithospheric structure and evolutionEffect of thermal gradient on the depth of the brittle–ductile transition in each planet for various models. Dashed, solid, and dotted lines indicate calculation results using strain rate of 10−16, 10−17, and 10−18 s−1, respectively. The tensional stress field is assumed at shallow depths, and the parameters for the calculations are listed in Tables 1 and 2Back to article page