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Of the many equilibrium terms that have been proposed, only two are needed: dynamic equilibrium in the original sense of G.K. Gilbert (1877) and steady state. The former refers to the relationship between the process components of a system, the latter to the system as a whole. The tendency towards establishing a dynamic equilibrium is inherent in all natural systems that contain negative feedbacks...
Theoretical model experiments demonstrate that non-periglacial sorted nets can develop on any piece of unobstructed ground surface that has little or no gradient, if it bears a loose, discontinuous cover of pebble-sized stones and if these particles are moved on the surface in small steps in any direction of the compass with equal probability. The physical causes of these movements are not important...
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