## 3 Results  
### Petrographic Characteristics and Physical-Mechanical Properties  
To determine their petrographic characteristics and to relate them to physical and mechanical properties macroscopic observation was done. The textural characteristics were determined on 33 in situ carbonate samples. Among them on seven dolomites and on 26 limestone samples (Figures 4 and 5). The samples were classified into packstone and grainstone groups according to the depositional texture. Figure 4: Grainstone depositional textures from different locations: (**a**) dolomite from Brušane; (**b**) dolomite from Skrobotnik; (**c**) limestone from Salakovci; (**d**) limestone from Korenici. Figure 5: _Cont._  
All dolomite samples (four from Brusane--Figure 4a and three from Skrobotnik--Figure 4b) were determined as dologranistones with visibly preserved primary depositional textures and grains with grain-support. Brusane samples were represented by grey to black laminated dolomites with partially visible fossil grains while Skrobotnik samples are dark yellowish laminated dolomites. Unlike dolomites, limestone samples were determined as both grainstones and packstones. Two out of seven grainstone samples are from the Korenici and five are from Salakovci location. Yellowish to brown homogenous limestones from Salakovci (Figure 4c) are determined as foraminiferal grainstones with dimensions of grains from 1 to maximum 5 mm. Light yellow limestones with fossil fragments from Korenici (Figure 4d) show visible anisotropy (lamination) and have high primary porosity with pores up to 3 mm. There is a total of 19 limestone samples determined as packstones: two of them from Medurace, three from Debelo brdo, and seven from each Treget and Kanfanar location. Medurace limestone (Figure 5a) is of red to brown colour with randomly oriented white wide fissures subsequently filled with calcite cement. Debelo brdo limestones (Figure 5b) are dark in colour probably due to organic matter content. In addition, samples show visible lamination and stylolite type fissures. Yellowish samples from Treget (Figure 5c) have homogeneously distributed fossil fragments with dimensions from 0,1 to 3 mm. Kanfanar samples (Figure 5d) are yellowish with clearly visible fossils (oncoids) up to 3 mm in micritic base. Small fissures represented by stylolitic seams filled with calcite cement are also visible. In addition to petrographic analysis, laboratory samples were prepared from 33 field samples for a total of 231 physical-mechanical properties tests. General descriptive statistics of all test results are presented in Table 1. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline
**General Statistics** & \(\rho\) & \(n\) & \(\mathbf{I_{d500}}\) & \(SRH\) & \(v_{p}\) & \(\sigma_{e}\) & \(E\) \\ \hline min & 2376 & 0.14 & 0.5 & 38.2 & 4944 & 51.44 & 38.38 \\ max & 2823 & 11.25 & 6.8 & 72.5 & 6378 & 181.36 & 93.26 \\ average & 2634.64 & 3.22 & 4.30 & 59.05 & 5710.12 & 126.81 & 57.11 \\ standard deviation & 122.10 & 3.01 & 1.43 & 8.98 & 389.80 & 32.45 & 12.99 \\ Coefficient of variation (\%) & 4.63 & 93.48 & 33.26 & 15.21 & 6.83 & 25.59 & 22.75 \\ \hline \hline \end{tabular} \(\rho\)—density (kg/m); \(n\)—porosity (%); \(l_{d500}\)—point load test index (MPA); \(v_{p}\)—P wave velocity (m/s); \(SRH\)—Schmidt rebound hardness; \(\sigma_{e}\)—uniaxial compressive strength (MPa); \(E\)—Young’s modulus of elasticity (GPa).  
\end{table} 
Table 1: General descriptive statistics of grain-supported carb onates test results. Figure 5: Packstone depositional texture in limestones from different locations: (**a**) Medurace; (**b**) Debelo brdo; (**c**) Treget; (**d**) Kanfanar. The wide range of all studied properties (from minimum to maximum) shows that the collected rocks with packstone and grainstone texture have quite different physical and mechanical properties. The minimum value of uniaxial strength is 51.44 MPa and the maximum value is 181.36 MPa.