In the context of two converging tectonic plates, the continental lithospheres can collide. The sedimentary layers that they carry are subjected to high pressures that cause their deformation.
Learning goals
To define the principal forms of geological folds.
To define the hinge of a fold and its axial plane.
To illustrate the relation between the form of a fold and pressure intensity.
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The deformation of strata is slow (a few centimeters per year) and takes place over several mllion years.
Sedimentary terrain in the convergence zone are first folded, and they can stand on end…