## 3 Geological Data Interpretation
Legend: 1—Isolines of anomalies in mgal; 2—the highest positive and negative values of mgal; 3—major Mosor-Biokovo-Dubrovnik fault (4), borders of regional structural units; 4—faults extending along large local elevated reverse structures of vergences toward S and SSW-SW; 5—mark for reverse faults. Figure 9: Mosor–Biokovo–Dubrovnik fault zone (4a,b), its branches, and steep relief of Biokovo near Makarska, caused by compression in the contact area of regional structural units and reverse shifts in hanging wall of fault (Google Earth). Legend: 1—Mosor–Biokovo–Dubrovnik fault (4a,b); 2—fault branches; 3—basic direction of movement of parts of the Adriatic regional structural unit based on geodetic data; 4—the reverse movement of the hanging wall of the Mosor–Biokovo–Dubrovnik fault (4a,b). Earthquake events always highlight the recent tectonic activity. Notably different is the relatively wide contact between the Adriatic (A) and Dinaric (D) regional structural units. An example of the profile of the seismotectonically active area around Rijeka is shown in Figure 7b. The earthquake focuses reveal the positions of deep faults. These faults are obliquely inclined, and the earthquake focuses reach a depth of 30 km. The same depths were recorded in other places such as Dubrovnik. The Paleozoic rocks in the Ilirska Bistrica-Rijeka-Vinodol fault zone (3) show shifts of several kilometers. It is necessary to look at the regional area shown in Figure 11 to observe the tectonic activity in the western part of the Pannonian Basin (WPB). The origins of the tectonic activity in the separated regional area are the movements of the AMP. They show extreme compression in the Southern Alps (SA) and the northern part of the Dinarides (D unit). The regional deformations may result from the reversal movements of the Alps and Dinarides and their transcurrent movements. The WPB and Sava fault (SF) are partially in an enclosed position between the Alps and Dinarides. The consequence is the transpression of space and formation of compression structures in the NNE-SSW and NE-SW directions, along with the rightward tectonic transport. Geological data show the prevalence of the horizontal component of the fault wall movement around Ljubljana and especially along the Peridratic fault (9) and its branches. Geodetic data also confirm the generally eastward movements at the PTUJ, DONA, and ZABO points. The movement directions of the geodetic points around Ljubljana toward the NNE and NNW indicate the rotation of the Sava fault (SF) structures caused by horizontal movements in the Ljubljana-Karlovac-Slunj (5) fault zone. Tectonic movements are constantly followed by the occurrence of earthquakes (Figure 11b). In particular, the seismotectonically active area is the Zumberak-Medvednica structural unit, which encompasses the most important Zagreb fault (8) and the local structures at Varazdin, along which the Peridratic fault (9) continues to the Drava fault (9 in Figure 12). In the SPB, the structures are extended in the NNW-ESE direction (Figure 12). The Sava (14) and Drava Basins (16) are dominant in the geological structure setting, filled with Neogene-Quaternary sediments. Reverse faults with opposite vergences extend along their boundaries, with elevated smaller structural units between them. Reverse faults along their walls indicate the presence of space compression. The units are constructed mostly  
Table 1.0 Local reverse structure in Crikvenica area due to compression in the contact area of regional structural units (Google Earth). Legend: 1—Major Ilirska Bistrica–Rijeka fault (3a) and its main branch (3b); 2—other faults in the wider zone; 3—reverse faults; and 4—local elevated structure with reverse faults of opposite vergence along their walls. of Paleozoicic granite, gneiss, and metamorphic rocks of higher density, with quaternary sediments, found only on the surface at Bilogora (13). Table 1.1 (**a**) Recent geological structural setting and tectonic activity in the contact area of Adriatic microplate, Alps, Dinarides, and Pannonian Basin.