## 4 Results from the Used Geophysical Methods
### Gravimetric Measurements  
The gravimetric interpretation took place in two stages. In the first stage, a map of complete Bouguer anomalies was compiled, which was the basis for qualitative and quantitative gravimetric interpretation. Maps were compiled for two reduction densities of 2.20 g\(\cdot\)cm\({}^{-3}\) and 2.67 g\(\cdot\)cm\({}^{-3}\)[34]. A map for a density of 2.67 g\(\cdot\)cm\({}^{-3}\) was used for the interpretation shown later in this article (Figure 7b).  
Figure 6: Deep seismic cross-section No. 16/75 illustrated shortening around the Pieniny Klippen belt on the edge with the Humenne Unit and Central Carpathian Paleogene basin. The flower structure is a result of transpressive movements on the Pieniny Klippen Belt where south vergent thrusting generated a system of tectonic sheets. The bed is thickened where it contacts the “inflated” aquifer.  
The unified map of complete Bouguer anomalies reflects the gravitational effects of all lithospheric inhomogeneities. It summarizes the gravitational effect of near-surface and deep inhomogeneities. Regional and residual anomalies can be identified. In general, regional anomalies are the response of large inhomogeneities at great depths. Residual anomalies, however, reflect the gravitational effect of inhomogeneities closer to the surface and over a smaller surface area. It is important to take into account the reduction density, according to which the map was calculated, because the source of the anomalies may affect the terrain.  
One example of when the anomaly source may affect the terrain is when extreme relief can be observed as well as a large difference in surface densities (more than our used value of 2.67 g\(\cdot\)cm\({}^{-3}\)). This can occur in the studied area in parts where neovolcanics are present and the neovolcanics have a difference of relief of more than 500 m. A second example is Paleogene sediments where the relief is lower than 500 m, but the difference in density is larger than 0.12 g\(\cdot\)cm\({}^{-3}\). Derived gravimetric maps were also calculated, i.e., maps of residual anomalies for a radius of 4 km, as well as a map of linear elements of the gravity field [36]. The map of residual anomalies (Figure 7a) highlights relatively shallow anomaly sources within the map of complete Bouguer anomalies. This allows the possibility of creating a more accurate geological-geophysical interpretation. The map of linear elements of the gravity field is suitable for the interpretation of fault tectonics.  
The results of the map of complete Bouguer anomalies (CBA) confirm the presence of a very segmented gravity field structure. These segments represent elevations and depressions of varying degrees, which are separated from each other by density borders. These borders are visible on the map as dense accumulations of isolines.  
The largest anomalous zone in the CBA map is the positive anomaly oriented in the NW-SE direction, reaching values from +10 mGal to \(-15\) mGal. This anomaly mainly corresponds to the Humenne Unit, which is overlain by Neogene sediments in its central parts. Towards the northeast, the Humenne Unit immerses under the Central Carpathian Paleogene.