Recently the structure of the Slovak Karst was considered as the most simple in the frame of the Zapadne Karpaty Mts (the Western Carpathians). Its Mesozoic complex was regarded as a cover of the Palaeozoic of the Spisskogemerske rudohorie Mts (the Spish-Gemer Ore-Mountains). Today the Slovak Karst is considered as one of the areas with a complicated geological structure. Five tectonic units participate in its nappe structure by contemporary knowledge. Besides the mentioned Silica Nappe other four tectonic units come from the palaeogeographic zones neighbouring on the carbonate platform. They are from a forereef slope and oceanic slope (Tethydic) of the oceanic mobile zone and from an opposite declivity of the oceanic trench. The rocks from these zones were escaping from attention for a long time therefore ones crop up the surface with a much smaller extent than rocks of the Silica Nappe. It's consequence of two facts. First the Silica Nappe overlaps them on a larger part and secondly a significant part of these rocks was pulled in the depths and melted there during the collision closuring of the oceanic range in the Middle and Upper Jurassic Period.
The Silicicum is represented only by the Silica Nappe. It constitutes an extensive nappe body laid horizontally or subhorizontally. The nappe was broken up to a series of the partial structures and blocks during or after overfaults. Many parts were removed by erosion and denudation. Mainly the Jurassic horizon is preserved only rudimentarily by this way. The sediments of the Middle and Lower Triassic Period reach the largest occurrence. Since the Silica Nappe is a case of rootless nappe, its original Palaeozoic underlying beds are unknown. From view of the facies it is very well compared with the Schneeber Nappe and Murzalpine Nappe of the Juvavicum in the Northern Limestone Alps. The Silica Nappe builds as well the Aggtelek Karst with difference in facial filling that there is with a more occurrence of the pelagic facies (much larger distribution of the Hallstatt and Zlambash facies and Nadash limestones).
Gemericum reaches the territory on surface only by its southern margins. It is not clear in the meantime if its occurrence can be found in the South of the Rozhnava Fault in a depth under other units.
The Borka Nappe creates the numerous occurrences of the metamorphic Upper Palaeozoic - Mesozoic sequences somewhere isolated elsewhere more or less continued. The rocks are placed relatively higher in comparison to its surroundings. Their common characteristic is an alpine metamorphosis passed in conditions of the medium to higher pressure with a relatively low geothermal gradient. There are the cases of the occurrence on the northern slopes of the Jasov Plateau between Jasov and Hacava, in the central part of the Zadielska dolina (the Zadiel Valley), in the northern vicinity of the Borka and Lucka, a minor occurrence on the eastern slope of the castle hill Krasna Horka and more extensive occurrences outside the territory.
Meliaticum consists of the fragments coming from the oceanic and paraoceanic mobile zone between the shelf of the Europe and shelf of the Apulia. This zone, known as the Meliatic Ocean too, rose by a reefting and a spreading during the period from the Pelsonian to the Carnian and became extinct in the time of collision in the Upper Jurassic Period. Characteristic of it is a sedimentation of the deep-water sediments (pelagic, often radiolarian limestones, cherts, silicious pellits, black slates, turbidits). The sedimentation in the time of reefting was accompanied with submarine volcanic activity.
Turnaicum forms a rootless nappe, compounded of more partial units, which emerge from under the Silica Nappe. According to the original definition only the Triassic and Jurassic rocks were known of it. Recently the Palaeozoic rocks of the Brusnicka anticline were ranked to it. These are well comparable with Palaeozoic rocks in the Szendro Mts.
The Cenozoic (Tertiary and Quaternary) sediments (with exclusion of the plateau areas) overlap the above mentioned Palaeoalpine tectonic units, especially in the Rimava, Rozhnava and Bodva Basin. Their sedimentation began already in the Eocene Epoch. The Drienovec conglomerates are from the Oligocene.
The Miocene beds (the conglomerates, sandstones, breccias, limestones and, in deeper parts, clays) dominate in peripheral parts of the basins. The Neogene sedimentation ends with gravels, sands and multicolored clays of the Poltar strata.
On the karst plateaus of the Quaternary sediments dominate the sediments connected with the processes of a creation of a karst, a weathering, a declivity modelling and a slope transport. Processes and sediments connected with erosion and accumulative activity of rivers and brooks prevail in the river valleys and basins. Typically for plateaus in the Slovak Karst is a development of the cave sediments.