http://geopaleo.fns.uniba.sk/ageos/ Rich Site Summary en PHP RSS Generator http://geopaleo.fns.uniba.sk/ageos/articles/download_en.php?yr=2025&volume=17&issue=2 We would like to announce that the latest issue of the journal Acta Geologica Slovaca (Volume 17, Issue 2) was released on 30 January 2026. Fri, 30 Jan 2026 07:00:00 +0100 http://geopaleo.fns.uniba.sk/ageos/articles/download_en.php?yr=2025&volume=17&issue=1 We would like to announce that the latest issue of journal Acta Geologica Slovaca (Volume 17, Issue 1) was released on 8 August 2025. Fri, 8 Aug 2025 12:00:00 +0200 http://geopaleo.fns.uniba.sk/ageos/articles/download_en.php?yr=2024&volume=16&issue=2 We would like to announce that the latest issue of journal Acta Geologica Slovaca (Volume 16, Issue 2) was released on 19 December 2024. Thu, 19 Dec 2024 08:00:00 +0200 http://geopaleo.fns.uniba.sk/ageos/articles/download_en.php?yr=2024&volume=16&issue=1 We would like to announce that the latest issue of journal Acta Geologica Slovacal (Volume 16, Issue 1) was released on 30 June 2024. Sun, 30 Jun 2024 08:00:00 +0200 http://geopaleo.fns.uniba.sk/ageos/articles/abstract_en.php?path=krcmar_et_al&vol=16&iss=1 In areas heavily influenced by water extraction, the interaction between river water and groundwater is crucial for maintaining hydrological balance. This study examines the effects of mechanically disrupting the clogging layer in the Torysa River's riverbed on water infiltration into an adjacent aquifer. Using a tractor-mounted plough to break up the clogging layer, an unconventional method in this field, we ob-served the changes in water levels to determine alterations in hydraulic connectivity. The intervention led to a notable rise in groundwater levels, with an increase of over one meter in six days, suggesting enhanced river-aquifer interaction. A 2D hydrological model quantified the changes in the riverbed's hydraulic con-ductivity before and after the intervention. Although the results confirm the variable nature of riverbed sediment permeability and its importance in water management, the practicality of employing tractors for such purposes is limited. The study advocates for future research to investigate less conventional methods to sustain or improve the natural functionality of riverbeds, contributing to the development of sustainable water extraction practices and a deeper understanding of the interplay between human activity and hydro-logical systems. Fri, 21 Jun 2024 07:00:00 +0100 http://geopaleo.fns.uniba.sk/ageos/articles/abstract_en.php?path=aubrecht_bacik&vol=16&iss=1 In the Slovak Karst area, three quarries are situated west of the Čoltovo Village. In the southern quarry, the Anisian carbonatic succession of the Silica Nappe is uncovered. Palaeokarst clefts and cavities were revealed in the calciturbiditic limestones of the Raming Limestone. They mostly contain yellowish to red sinter filling with flowstone draperies, small stalactites and stalagmites. The rest is filled with yellowish (ochre) material. The PXRD analysis (Powder X-Ray Diffraction) indicates that the material is represented predominantly by diaspore, which is an aluminium oxide hydroxide mineral, α-AlO(OH). This means that the material most likely represents a remnant bauxite deposit. By now, only several small occurrences of bauxitic ores were found in Slovakia. Diasporic bauxites were found only on Glac Plateau in the Stratenská hornatina Mts. The Čoltovo occurrence is then the second one of this type of bauxite. These occurrences share similar tectonic position, genesis and most likely also the same provenance. All these bauxitic occurrences in the Western Carpathians are invariably related to the emersion and karstification period that occurred after the main nappe thrusting phase in the West Carpathian internides, i.e., their age spans from the Late Cretaceous to Paleocene. In this period, the Western Carpathian area was in the humid tropical climate zone, which was able to promote lateritic weathering. In later periods, the climate was not suitable for such a weathering. It is not yet known, whether the bauxitic material rests in its original position or it was reworked and resedimented to younger clefts and cavities. Further research is necessary to verify the age and provenance of this new bauxite occurrence. Fri, 21 Jun 2024 06:00:00 +0100 http://geopaleo.fns.uniba.sk/ageos/articles/abstract_en.php?path=aherwar_et_al&vol=16&iss=1 Despite the extensive presence of river terraces in the Central Western Carpathians, geochronological proxies for their formation are scarce, particularly concerning Middle and Lower Pleistocene accumulations. This study employs authigenic 10Be/9Be dating on a Horná Štubňa river terrace outcrop in the southern Turiec Basin, with an expected age of > 500 ka, as the settings prohibit the use of other, more established methods. The dating focused on floodplain muds, situated above angular gravels deposited by the debris flow process and below rounded sandy gravel deposited by a debris flood. Five ages were obtained, showing a scattered distribution ranging from 724–394 ka, after excluding one outlier sample. However, correcting the dating, which involved considering the age and uncertainty of the initial 10Be/9Be ratio calibration site Veľký Čepčín, resulted in an age range of 690–1020 ka, with a mean weighted age of 838.0 ± 83.3 ka. These findings suggest that the climatic changes associated with the Middle Pleistocene transition may have influenced base-level changes in the Turiec Basin, as the studied terrace represents the second-highest level of the preserved staircase. The documented low incision rate of ~ 0.03–0.04 mm·a-1 deviates from an order of magnitude higher values determined from the Outer Western Carpathians but agrees with the values established for the Pannonian Basin, Transdanubian Range and Eastern Alps. Sun, 16 Jun 2024 06:00:00 +0100 http://geopaleo.fns.uniba.sk/ageos/articles/abstract_en.php?path=vojtko_krivanova&vol=16&iss=1 The Nízke Tatry Mts. is a significant mountain range in the middle part of the Central Western Carpathians which is divided into two important sub-units, the eastern part is composed of the Veporic crystalline basement (Kráľovohoľské Tatry), which is thrust onto the Tatric crystalline basement (Ďumbierske Tatry) located in the western part during the Eo-Alpine (Cretaceous) tectogenesis. Both basements are characterised by well-developed Variscan pervasive planar structural elements, which originate from the syn-metamorphic crystallisation of rock-forming minerals and their parallel alignment. This Variscan foliation is an important marker for understanding the Alpine deformation, which was accompanied by low-grade metamorphism, mylonitisation, and cataclasis, especially in the microscale, originating during the simple shear deformation mechanism with the evolution of spaced, crenulation and mylonitic foliations. On a map scale, the Alpine structure is indicated by individual thrust shear zones, that are composed of mylonites with ENE – WSW strike and predominantly intermediate SE dip. The internal structures of these shear zones have pronounced asymmetry characterised by asymmetrically deformed objects, such as quartz lenses and asymmetry of macro-folds, porphyroblasts, shear bands stretching, and mineral lineations referring to top-to-the-NNW transport (average azimuth of 343 degrees). The geometric relationships of the planar structures and lineations define the top-to-the-NNW tectonic transport of the Veporic Unit onto the Tatric Unit along the Čertovica thrust during the Eo-Alpine tectogenesis. Fri, 14 Jun 2024 06:00:00 +0100 http://geopaleo.fns.uniba.sk/ageos/articles/abstract_en.php?path=hoppanova_et_al&vol=16&iss=1 The Brusno-Brzáčka occurrence (N 48.7698772°; E 19.4128150°) is located near the Brusno village (Slovenské Rudohorie Mts. Veporic Unit). Historically, the mineralization was explored by small-scale mining works located at the contact between the siliciclastic rocks of the Upper Permian and the Lower Triassic age. Paleo-Alpine metamorphic-hydrothermal mineralization is represented by quartz, baryte, or quartz-baryte veins, containing weak ore mineralization. Its succession is as follows: coarse-grained quartz I, pyrite (mineralization period I); baryte (II); tetrahedrite-(Zn), chalcopyrite (III); galena (IV) and quartz II (V). Supergene alteration produced initially covellite and spionkopite in the cementation zone. The oldest minerals in the oxidation zone are goethite, pyromorphite and mimetite. They were succeeded by the crystallization of Ba-rich anglesite, which partly overlaps in time with the precipitation of slightly younger anglesite. The formation of baryte partly overlaps with the deposition of anglesite, but in most cases, it is clearly younger. Bismutite is the youngest supergene mineral. A solid solution of anglesite–baryte with a Ba content from 0.29 apfu up to 0.51 apfu (i.e., Ba-rich anglesite) was identified at the studied site. This mineral phase covers the field of immiscibility of the natural solid solution PbSO4 – BaSO4, but the Ba/Pb ratio practically does not enter the baryte field (Pb-rich baryte). Mon, 26 Feb 2024 06:00:00 +0100 http://geopaleo.fns.uniba.sk/ageos/articles/download_en.php?yr=2023&volume=15&issue=2 We would like to announce that the latest issue of journal Acta Geologica Slovaca (Volume 15, Issue 2) was released on 17 January 2024. Wed, 17 Jan 2024 08:00:00 +0200 http://geopaleo.fns.uniba.sk/ageos/articles/download_en.php?yr=2023&volume=15&issue=1 We would like to announce that the latest issue of journal Acta Geologica Slovaca (Volume 15, Issue 1) was released on 30 June 2023. Fri, 30 Jun 2023 08:00:00 +0200 http://geopaleo.fns.uniba.sk/ageos/articles/download_en.php?yr=2022&volume=14&issue=2 We would like to announce that the latest issue of journal Acta Geologica Slovaca (Volume 14, Issue 2) was released on 21 December 2022. Wed, 21 Dec 2022 09:00:00 +0200 http://geopaleo.fns.uniba.sk/ageos/articles/abstract_en.php?path=majzlan_et_al&vol=14&iss=2 This research is focused on the dolines of Dobrá Voda Karst, which is situated in the Brezovské Karpaty Mts. (north-eastern part of the Malé Karpaty Mts) near the villages of Chtelnica and Dobrá Voda. 263 dolines were identified here and measured in the field, which is presumably the final count. The measured parameters of the dolines were used for morphometric analyses, as well as for finding out the relationships with the geology of the area. The karst is formed in Triassic carbonates of the Považie and Dobrá Voda nappes of the Hronic Unit. Dolines were identified in Neogene basal carbonatic conglomerates (Dobrá Voda Formation) as well. The area of karst rocks is approximately 87.2 km2. Dolines often tend to be formed in lines with tectonical or lithological predisposition. The most significant lines in the Dobrá Voda Karst are Hlboký Dol, Chtelnické Uhliská, and Cínovec. The origin of dolines can be assumed to the Quaternary Period and related to neotectonics, the development of the relief, and the formation of the river network. This is also confirmed by the trends of the maximum axes of the extension of dolines in the direction N-S, NE-SW and WNW-ESE, which partially correspond to the regional faults. New faults (Hlboký Dol, Cínovec, Bzová) were also identified on the basis of dolines in the lines. Wed, 06 Apr 2022 06:00:00 +0100 http://geopaleo.fns.uniba.sk/ageos/articles/download_en.php?yr=2022&volume=14&issue=1 We would like to announce that the latest issue of journal Acta Geologica Slovaca (Volume 14, Issue 1) was released on 27 June 2022. Mon, 27 Jun 2022 06:00:00 +0200