The complexity of the geological development of the Earth's crust within the Mountain Crimea during the Jurassic and Cretaceous periods has been repeatedly noted in the geological literature. In the Belbek-Kachinsky interfluve, the Early Cretaceous history is quite clearly traceable to the end of the Valanginian; the geologic events of the end of the Early Cretaceous are less clearly delineated because of the incompleteness of the stratigraphic section ...

Difficulties arising in detailed geological mapping of vast sodden and forested areas, in some cases successfully overcome the application of geophysical methods. ...

The Tannuol intrusion, one of the largest Lower Paleozoic granitoid intrusions of Tuva, which has a very complex petrographic composition and multiphase character of formation, was long considered as a plate-shaped body confined to the boundary of two lithologically and structurally different Cambrian and Ordovician formations, or as a folded flat-shaped body with steeply dipping wings in some folds. Structural and microstructural analysis of this intrusion has forced a reconsideration of the above notions.

The Tannuol magmatic complex unites large granitoid massifs of Cambrian age, widely distributed in Central and especially Eastern Tuva. The idea of the Tannuolian complex as a complex multiphase intrusion was first formulated by V. A. Kuznetsov.The history of development of the complex is not yet unambiguously established. Some researchers develop the idea of multiphase intrusion formation process, while others explain the diversity of rocks composing the complex massifs by hybridization processes during single-act magma intrusion of granitoid composition. The recently published monographs of G. V. Pinus and T. V. Pinus and T. N. Ivanova ...