Search Results

You are looking at 1 - 2 of 2 items for

  • Author: Stanislav Konečný x
Clear All Modify Search
Open access

Marian Gajdoš and Stanislav Konečný

Abstract

The authors present the formation and development of the Ukrainian national education system in Slovakia after the World War II, which was determined by its results and new political conditions. The founding of Russian schools in Eastern Slovakia did not correspond to the wishes of part of the Ruthenian population, and their preference was a source of permanent tension. The authors of this article analyse the personnel, material and technical problems related to the development of Ukrainian (Russian) schools as well as the activities of political and state authorities in their solution. The introduction of the Ukrainian language as the language of instruction disrupted the consolidation in this area and increased dissatisfaction in many municipalities. The efforts to persuade people or various administrative obstacles could not prevent the change of the language of instruction from Ukrainian to Slovak.

Open access

Igor V. Chernyshev, Vlastimil Konečný, Jaroslav Lexa, Vladimir A. Kovalenker, Stanislav Jeleň, Vladimir A. Lebedev and Yurij V. Goltsman

Abstract

The Štiavnica Stratovolcano in Central Slovakia is the largest volcano in the Neogene to Quaternary Carpathian volcanic arc. A large caldera, an extensive subvolcanic intrusive complex and a resurgent horst with late stage rhyolite volcanites are the most characteristic features. The results of new K-Ar and Rb-Sr isotope dating using more sophisticated methodical approaches have changed our view on the timing of volcanic and intrusive activity. K-Ar dating of groundmass fractions combined with Rb-Sr isochron dating in the cases of possible rejuvenation has provided highly reliable results. The lifespan of the stratovolcano is apparently shorter than assumed earlier. Evolution of the stratovolcano took place in five stages during the Early Badenian to beginning of Early Pannonian time: (1) construction of the extensive andesite stratovolcano during the interval 15.0-13.5 Ma; (2) denudation of the volcano concluded with the initial subsidence of a caldera and the contemporaneous emplacement of a subvolcanic intrusive complex of diorite, granodiorite, granodiorite porphyries and quartz-diorite porphyries during the interval 13.5-12.9 Ma; (3) subsidence of the caldera and its filling by differentiated andesites during the interval 13.1-12.7 Ma - volcanic activity overlapping with the emplacement of the youngest intrusions; (4) renewed explosive and effusive activity of less differentiated andesites during the interval 12.7-12.2 Ma; (5) uplift of the resurgent horst in the central part of the caldera accompanied by rhyolite volcanic/intrusive activity during the interval 12.2-11.4 Ma. Extensive epithermal mineralization was contemporaneous with the uplift of the resurgent horst and rhyolite volcanic activity and continued till 10.7 Ma