Geomorphologic peculiarities of location, morphometrical parameters and agents of formation of the tors in the village of Tserkivna in Eastern Beskydy are described. Previous studies of rocks in the area are analyzed. Measurements are done and Rose diagram of the direction of strike of cracks of different origins in the body of sandstone is built. A biodiversity on the rocks, characteristics and causes of localization of different plant species on them are described. Recommendations to promote the popularization of rocks in Tserkivna, informing about their geomorphologic, historical and geographical features, value and uniqueness among tourists and scientists are designed. Additional measures to preserve these objects are also recommended. Key words: morphometry of the tors, forms of rocks, fissures, forming of the crags.

Poor imaging is frequently observed in many subsalt regions, making the subsalt stratigraphy interpretation and prospect evaluation challenging. We propose a critical reflection illumination analysis to evaluate subsalt illumination in areas where high-velocity contrasts create illumination and imaging shadows. Critical reflection often occurs at the base or flank of salt bodies. If critical reflection occurred, continued iterations of processing and imaging would generate little, if any, improvement in imaging results. Similarly, increasing the offset/azimuth of the acquisition would offer limited or no advantage. We introduce the critical reflection illumination map and illumination rose diagram to efficiently and effectively evaluate the probability of critical reflection for the target. This analysis can help avoid expensive processing, imaging, and acquisition efforts for areas that are in the critical/postcritical reflection regime. Critical reflection illumination analysis can also be applied to other high-velocity contrast scenarios.

The rock attitude elements play important role in the fields of both mechanical properties and stability analysis. The traditional statistical graphs such as rose diagram, isopycnic graph and angle histogram are displayed which can roughly estimate the dip direction and angle of rock mass. And k-mean clustering analysis is applied to rock mass discontinuity attitude automatic statistic which can determine the the dip direction of rock mass accurately and estimate the proportion of gathered data. The K-mean clustering analysis is a beneficial supplement of traditional statistical methods, which has a prospect of engineering application.