INHERITED TRENDS IN THE DEVELOPMENT OF THE PALEOZOIC STRUCTURES OF THE SARYSU-TENIZ UPLIFT (CENTRAL KAZAKHSTAN)

The history of the development of the structural forms in the Sarysu-Teniz uplift, central Kazakhstan, is expressed in the lower Caledonian, late Caledonian, and upper Hercynian. The first period is characterized by meridional folding which resulted in the formation of the Paleozoic geosyncline. In the second period, development of the geosyncline ceased and volcanic activity, both effusive and intrusive, was intense. The principal tectonic elements of the Devonian (late Caledonian) were inherited from the lower Paleozoic. In Middle Devonian, extensive faulting occurred. These "newborn" Hercynian structures, developed on older Caledonian structures, were not determinative for this region. During the third period of tectonic deformation, large west and northwest-trending fold-blocks, called graben-synclines and horst-anticlines, were formed. Because the structural features of the first two periods are structurally similar and trend in the same direction, the differing third period is superimposed disconcordantly.