Anisotropic and Theologically stratificated earth’s crust together with atmosphere (hydrosphere) correspond to an idea of «competent» and «non-competent» layers. A loss of crust bended stability under a horizontal compression can be occurred due to any large heterogeneity or appearance of thrust. A longitudinal bend and thrust is a tectonic couple. Their realization is under the similar stresses. There is considered a mechanism of negative and positive crust bends of mobile and platform crust parts leading to its deep structural transformation. Elastic upper crust gives a stress for a long distance and a bend focused compression energy to a relatively small volume.