The paper is the seventeenth one in the series of publications, that are dedicated to fundamental problems of geoinformatics - subject of scientific research, main aims of the new science, methods to solve its specific tasks and so on. In the seventeenth paper the detailed analysis of geochronological boundaries of the international time scale "GTS-2004" is began. For such an analysis a formal syntax of the calendar geochronological boundaries, based on galactic chronometric processes, is worked out. One of the most important galactic processes that can be used as chronometer is the oscillation of the Sun system perpendicularly to the plane of the Sun orbit (half-period of such an oscillation is equal to 44 million years). A some low of the empiric time scales evolution is postulated: the empiric geochronological boundaries aim unswervingly at syntactic boundaries as at their asimptotic ideals. As a concrete result of such a galactic processes is strictly periodical formation of iron ore deposits in Archean and Proterozoic.

• Якимчук Микола Андрійович (1954–) (геологічні науки)

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