Author describes the evolution of the caves and karst surface of the Divaški kras, an area above caves Škocjanske jame and Kačna jama. This karst is with 18 km of known cave passages, accessible to ...the depth of 280 m, one of the most interesting karst areas in Slovenia. There are descriptions of the oldest caves that are because of the denudation of the surface in shallow depth or surface already cuts trough them. These unroofed caves, which can be found there, enable the reconstruction of the oldest phases of the karst formation. In following chapter cave system of Škocjanske jame – Kačna jama is presented. In these two caves was with the analysis of the geological structure and comparison of the for these two caves geological structures, passage morphology, and recent sediments were sediments analysed in order to get evolution of the caves. Special attention was paid to the large chambers, canyons and collapse dolines. The hydrology of the underground river Reka is described, especially the bifurcations to several separated streams. In special chapter there are results of the datations of the stalagmites and other flowstone which dates some phases in cave evolution and well reflects the past climatic changes. In well designed book with rich photographic material an extensive bibliography is added and summary in Slovene and English language.
The Postojnska jama cave system represents a union of old, now dry, horizontal cave passages, the Pivka river active passage, and shafts or collapse dolines, which enable surface connection with some ...cave passages. The present entrance to the cave is formed at the contact between the Postojna basin impermeable Eocene flysch and the Upper Cretaceous limestone. The Pivka river sink entrance is formed along interbedded movements in the horizontal direction, and in the vertical direction it lies in a strong tectonic fault zone of NE-SW direction. The cave passages are formed in tectonic deformations which developed by the formation of the Postojna anticline, as there are interbedded movements, and in later fault deformations, where the main tectonic fault zones directions are the Dinaric NW-SE and cross-Dinaric NE-SW. Besides two main fault directions, the accompanying broken and fissured zones which are the result of the fault Dinaric tectonics are also favourable to cave formation.
Rad se bavi pregledom i analizom članaka pulskog dnevnika Corriere Istriano u razdoblju od listopada do prosinca 1943. godine, a vezano uz stradale Istrane u fojbama i boksitnim jamama nakon ...kapitulacije Italije 8. rujna iste godine. U općenarodnom ustanku koji je uslijedio uhićen je dio fašističkih čelnika, skvadrista te osoba za koje se sumnjalo (katkad i neopravdano, djelomice i iz osobnih razloga), da su bili u vezi s fašističkim strukturama. Pulski Corriere počevši od listopada 1943. opisuje sudbinu brojnih uhićenih i ubijenih te potom bačenih u boksitne i kraške jame – fojbe. Opisujući rujanske događaje, dnevnik se usko držao fašističke propagande, s uvijek prisutnom usporedbom partizana, odnosno komunista, s divljim, krvoločnim zvijerima koje su za cilj imale uništiti talijansku Istru. Nadalje, uloga samih istarskih ustanika, antifašista, bila je smišljeno minorizirana, a za veći dio stradalih rečeno je da su pripadali fašističkom poretku. Ujedno je najviše prostora dano opisu njihovih herojskih života, posvećenih napretku talijanske domovine. Od sveukupno stotinjak tekstova, polovica nam daje konkretne podatke o deset pronađenih fojbi i boksitnih jama te 219 trupala, odnosno objavljena imena njih 118.
Research represent in this monograph (Incomplete Solution Of Carbonate Rocks In Karst Caves Of Slovenia) was dedicated to incomplete solution of limestones and dolomites in karst caves~that is to ...occurrence of thick, soft weathered zones of “soluble” residue of carbonate rocks. With field and laboratory analyses I have tried to find out what is happening within the carbonate rocks during weathering and why they do not dissolve completely. Solution penetrates into the rock along various textures and structures. Results of analysis have shown that during weathering limestones and dolomites become purer~Mg, Sr and U are leached out, structure of the rock becomes more porous. In the cases when surface of weathered rock come in contact with flowing water, the water tears exposed particles and transports them away. If water does not flow over the exposed particles fast enough, they remain attached to the wall of the cave. The ratio between corrosion and the mechanical erosion of carbonate rocks on cave passages walls is more significant for the formation of roughness and rocky relief on the wall than for the growth of the passage. Microorganisms are present in the processes, but it is not yet known if they contribute to the weathering. From research follows that zones of white porous rock on cave walls are a product of weathering and are not precipitated secondary minerals.
Izvir Pečina je obzidan iz vseh strani, le na čelnem zidu je puščena odprtina, ki človeku omogoča dostop do vode. Najpogosteje uporabljen gradbeni material pri obzidavi izvirov v Beli krajini je ...grobo obdelan lomljenec.
Strop obzidanih izvirov in jam je obokan (velban). Podboji in preklada odprtine so narejeni iz večjih in bolje obdelanih, mestoma celo klesanih kamnov.
Med zanimivejšimi obzidanimi izviri v Beli krajini je zagotovo izvir Škalva v Zapudju z letnico 1885, ki sodi med največje tovrstno obzidane izvire. V letu 2012 je bil obnovljen v okviru projekta ...Viri življenja/Izvori života.
Motiv križanega, ki ga najdemo vklesanega na obzidan izvir v Dragi pri Sinjem Vrhu je, je bil najpogostejši kamnoseški okrasni motiv na izdelkih v soško – vipavski in kraško – primorski arhitekturni ...regiji. V Belo krajino so ga prinesli primorski kamnoseki.
PDF
