20.500.12556/RUL-188671 Sestava in sedimentološka interpretacija srednjemiocenskega litotamnijskega apnenca pri Gorenjem Leskovcu Composition and sedimentological interpretation of middle Miocene Lithotamnion limestone at Gorenji Leskovec V okviru raziskovalne naloge sem preučevala okolje nastanka posameznih plasti litotamnijskega apnenca na območju Gorenjega Leskovca na Krškem. Namen raziskave je bil ugotoviti značilnosti sedimentacijskega okolja, v katerem je nastajal litotamnijski apnenec ter opredeliti dejavnike, ki so vplivali na njegov nastanek. Na podlagi terenskega dela in mikroskopske analize zbruskov sem določila značilnosti posameznih plasti ter interpretirala sedimentacijsko okolje in hidrodinamično energijo, ki je vplivala na odlaganje sedimenta. Raziskovani profil je vseboval sedem različnih litologij, odloženih na triasnem dolomitu: malo prodnat bioklastični grainstone s posamičnimi rodoidi in kopučami koralinej, bioklastični grainstone z redkejšimi prodniki in kopučami koralinej/rodoidi, malo prodnati bioklastični grainstone, koralinejski bindstone z rodoidi, grainstone s kopučami koralinej, navzkrižno laminirani grainstone in tankoplastnat grainstone. V posameznih plasteh so bili določeni rodovi rdečih alg Lithoporella, Lithothamnion, Mesophyllum, Phymatolithon, Sporolithon, Roseolithothamnion, Roseolithon, Hydrolithon in Litophyllum. Prisotnost različnih vrst in oblik alg ter značilnosti sedimenta kažejo na raznolike pogoje nastajanja apnenca. Rezultati so pokazali, da je bilo sedimentacijsko okolje, v katerem je nastalo obravnavano zaporedje, plitvomorsko z različnimi stopnjami hidrodinamične energije. Razlike med posameznimi plastmi so bile povezane predvsem s spreminjanjem energije okolja, transportom sedimenta ter razmerami za rast koralinejskih alg. Raziskava je tako omogočila boljše razumevanje nastanka litotamnijskega apnenca ter procesov, ki so vplivali na njegovo tvorbo. As part of this research project, I investigated the depositional environment of individual layers of lithothamnion limestone in the Gorenji Leskovec area near Krško. The aim of the study was to determine the characteristics of the sedimentary environment in which the lithothamnion limestone formed and to identify the factors that influenced its formation. Based on fieldwork and microscopic analysis of thin sections, I determined the characteristics of individual layers and interpreted the depositional environment and hydrodynamic energy that influenced sediment deposition. The studied section comprised seven distinct lithologies deposited on Triassic dolomite: sparsely pebbly bioclastic grainstone with scattered rhodoliths and coralline algal clumps; bioclastic grainstone with fewer pebbles and coralline algal clumps/rhodoliths; sparsely pebbly bioclastic grainstone; coralline algal bindstone with rhodoliths; grainstone with coralline algal clumps; cross-laminated grainstone and thin-bedded grainstone. The red algal genera identified within the various layers included Lithoporella, Lithothamnion, Mesophyllum, Phymatolithon, Sporolithon, Roseolithothamnion, Roseolithon, Hydrolithon, and Lithophyllum. The presence of different algal species and growth forms, together with the characteristics of the sediment indicated diverse conditions of limestone formation. The results showed that the depositional environment in which the studied succession formed was shallow-marine, with varying degrees of hydrodynamic energy. The differences between individual beds were primarily related to variations in environmental energy, sediment transport and conditions suitable for the growth of coralline algae. The study thus provided a better understanding of the formation of the lithothamnion limestone and the processes that influenced its formation. Centralna Paratetida litotamnijski apnenec rodoidi Gorenji Leskovec sedimentacijsko okolje srednji miocen Central Paratethys lithothamnion limestone rhodoliths Gorenji Leskovec depositional environment Middle Miocene true false false Slovenski jezik Angleški jezik Zaključna naloga 2026-09-25 09:00:10 2026-09-25 09:00:32 2026-09-26 04:31:32 0000-00-00 00:00:00 2026 0 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 1970-01-01 117830 31818.pdf 31818.pdf 1 E60A4A52142CA56BF450E7F5A60531FF c8312cfbfad750a894e41627924b3d75a656dd969b7ba330c018f61bfcc5eaba b9e95e35-b8ae-11f1-8bc5-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=248975 Naravoslovnotehniška fakulteta 0 0 0