week 04

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Yield stress envelope of the continental lithosphere defining the maximum stress for which the lithosphere behaves like an elastic solid. The failure envelope of the crust and upper mantle forms a double layer, each consisting of a brittle upper part and ductile lower part. The heavy line shows an example of a bending stress profile. The lithosphere exhibits brittle failure from the surface to depth z1, linear elastic behaviour from z1 to z2 and ductile failure below depth z2; z0 corresponds to the depth of no elastic strain.

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