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Geological Society, London, Special Publications; 1981; v. 9; p. 99-109;
DOI: 10.1144/GSL.SP.1981.009.01.09
© 1981 Geological Society of London

I. Mechanics of Thrusts and Nappes

The rock mechanics of thrust and nappe formation

S. A. F. Murrell

University College, London

Three models of thrust formation have been proposed: sliding opposed by friction, movement by flow in a thin layer, and spreading by more general flow. The field evidence suggests that the shear stresses involved must be low. Experimental and theoretical rock mechanics provide criteria which may be able to distinguish the applicability of the three models, with the constraint of low shear stresses, and the present paper investigates this possibility.