Experience in studying natural fractals

We investigate the fractal characteristics of diverse natural objects and discuss their possible applications. Fractal dimensions of the suture lines of ammonite shells, granite textures, the portions of the river network in the Onega and the Ladoga lakes basin and the multi-fractal spectra of varved clay sedimentation in these lakes were calculated. It is shown that the fractal dimensions of the suture lines of shells can be used to identify ammonites. Fractal textures of granites can be applied to improve their aesthetic perception. The fractal parameters of the river network and the sedimentation regimes in the lakes may be related to tectonics.