-> Proposed by Delaney et al. (1986)
-> If the difference between the magnitudes of the minimum and maximum horizontal stresses is large (a condition common in active tectonic regions), dikes may only intrude joints in a narrow range of orientations (situation 'A' below)
-> If the difference between the magnitudes of the minimum and maximum horizontal stresses is small (a condition common in tectonically inactive regions), dikes may intrude joints of almost any orientation provided magma pressure is high (situation 'B' below)
-> If a joint set previously exists in the area of a dike swarm, dike rotation can result as dikes intrude into these joints near the surface
