Banded structures are common in geological objects such as minerals and rocks. This paper is focused on a study of inner dynamics of the systems in which these structures can occur. There was performed an experiment to simulate banded structure formed in gel matrix. Mechanisms of regular pattern formation are discussed. The results of the experiment support the concept of selforganisation at formation of banded patterns. Any periodic changes in exterior are not necessary; this kind of pattern is formed by a reactiondiffusion process with feedback in nonlinear mechanism. Aim of this study was to improve method for recognition of nonlinear dynamics in natural geological objects and to bring laboratory experiments closer to real processes
