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EDS analysis of constituent minerals of nefelitic basanite from locality Konrádovce lava stream of ceric basalt formation of upper Phocene-Pleistocene age was carried out using the electron microscope JEOL JSM-840 and the energy-dispersive microanalyser KEVEX DELTA+ with MIRROR QUANTEX+ software.Based on the results of EDS microanalysis, the primary rock can be, from the petrographic point of view, described as nefelitic basanite. The following substances were determined in the primer matter and porfiric phenocrysts:- isometric grainsof pyroxene-augite (point A1),- grainsof nepheline-kalsite (point A2),- cryptocrystallic glassy matter (point A3),- grainsof olivine (point A4),- microlite of basic plagioclase (point A5).The energy-dispersive analysis is fast and full spectrum is taken at the same time. In common, a required time is less than one minute. Results of the measurement donot depend significantly on the topography of sample and it is also possible to analyze a rough surface which makes easier the preparation of samples. A very important aspect of the mentioned method is the precision of obtained results in order to identify the chemical composition of analyzed point which, in a subsequent step, allows to determine the type of mineral. EDS is a convenient and powerful supplement of microscopic studies which are, sometime, unable to distinguish exactly the complete composition of the analyzed rocks.

The paper deals with the contamination of underground and surface waters in the surroundings of the dump of the solid communal waste at the locality Cemjata in the East Slovakia,as well as with the development of the contamination in the surrounding of the dump depending on the time on the basis of the analysisof samples withdrawn from the net of drillholes in the observed area. In the area investigated there is described geological, geomorphological, climatic and hydrogeological situation, as well as the dump itself. The results acquired show that the contamination of the area brought about by medium size industrial and agricultural activity in the vicinity of the dump of the solid communal waste and inside the area investigated is comparable with the dangerous effects of the dump of the solid communal waste.

The paper deals with the modelling of the heat flow in the Earths crust. The used three-dimensional model utilises the computer environment where the rock masses are modelled by the set of basic structural elements placed in the orthogonal co-ordinate system x, y, z, while the basic structural element is a cube with a chosen size. The physical notion of the diffusion is utilised for modelling the potentials flow from places with higher value of potentials to the surrounding rock masses. With the help of coefficients of diffusion kx, ky, kz, representing the ability of transmission of the thermal energy being present in the basic structural element of the rock to the adjacent structural elements of the rock model, it is possible to model iso-tropic, anisotropic, or heterogeneous properties of the modelled rock masses, as well as the properties of spreading the heat in this environ-ment.

The analysis shows, that there is no statical dependence between contents of heavy metals in fly ash on one side, and contents in leaching characteristics of heavy metals from the stabilized waste and from the waste itself on the other side.