This thesis presents a sedimentological analysis of selected boundary stones from the Kras and Matarsko Podolje areas, where numerous stone markers from the early 19th century have been preserved. Both study areas are located in the southwestern part of Slovenia and belong to the External Dinarides, more specifically to the Komen thrust block within the Trieste–Komen anticlinorium. Lithologically, the region is dominated by carbonate rocks deposited on the Dinaric Carbonate Platform from the Lower Cretaceous to the Eocene.
The aim of the research was to determine which types of rocks were used for the construction of the boundary stones and to correlate them with the geological formations present in the area. Fieldwork was carried out at 11 locations, where a total of 12 boundary stones were recorded (two stones were present at site MK 23, designated MK 23A and MK 23B). In total, 16 samples were collected: two samples each from stones MK 10, MK 11, MK 20, MK 23A, and MK 30, and one sample from each of the remaining stones. In the laboratory, the samples were studied as petrographic thin sections. Based on petrographic characteristics, the samples were grouped into seven microfacies categories and one clastic group. Comparison with known lithological features of local formations shows that most of the studied rocks belong to the Repen, Lipica, Liburnia, and Sežana formations. Stones MK 10, MK 11, MK 14, MK 30, and MK 30A contain rudist debris and are classified within the Repen or Lipica Formation. Peloidal and bioclastic limestones from samples MK 20, MK 22, MK 23A, and MK 31 correspond to the Liburnia or Sežana Formation. Samples MK 23B and MK 24 represent fine-grained quartz sandstones, most likely derived from the Eocene flysch. The lithological diversity of the boundary stones indicates that the material was obtained locally, probably from small nearby quarries.
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