Founded 1934 by Prof. Dr Stefan Bončev
A Geo-Sciences Journal of the Geological Institute “Strashimir Dimitrov”, Bulgarian Academy of Sciences
Official Journal of the Carpathian-Balkan Geological Association

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VOLUME 55 (2)/August 2026

Zlatka Milakovska
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Irena Peytcheva
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Atanas Hikov
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Petyo Filipov
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Milena Vetseva
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Valentin Ganev
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Lora Bidzhova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Tsvetina Cherneva
Aurubis Bulgaria, 2070 Pirdop, Bulgaria
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Pavlin Nikolov
Aurubis Bulgaria, 2070 Pirdop, Bulgaria

Heavy metals and arsenic in Topolnitsa River sediments: application of the SIMONA protocol for sediment quality assessment according to the EU Water Framework Directive

Nikoleta Tzankova
Bulgarian Academy of Sciences, Institute of Mineralogy and Crystallography “Acad. Ivan Kostov”, Akad. G. Bonchev Str., Bl. 107, 1113 Sofia, Bulgaria
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Michail Tarassov
Bulgarian Academy of Sciences, Institute of Mineralogy and Crystallography “Acad. Ivan Kostov”, Akad. G. Bonchev Str., Bl. 107, 1113 Sofia, Bulgaria
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Rositsa Nikolova
Bulgarian Academy of Sciences, Institute of Mineralogy and Crystallography “Acad. Ivan Kostov”, Akad. G. Bonchev Str., Bl. 107, 1113 Sofia, Bulgaria
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Lyubomir Mihaylov
University of Mining and Geology “St. Ivan Rilski”, Prof. Boyan Kamenov Str., Studentski Grad, 1700 Sofia, Bulgaria
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Elena Tacheva
Bulgarian Academy of Sciences, Institute of Mineralogy and Crystallography “Acad. Ivan Kostov”, Akad. G. Bonchev Str., Bl. 107, 1113 Sofia, Bulgaria

Fluid-induced chemical and phase heterogeneity in pegmatitic apatite: implications for alteration conditions and anomalous optical biaxiality

Tzvetomila Vladinova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia
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Hristiana Georgieva
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia
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Elitsa Stefanova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia
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Zahari Nanov
Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia
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Rossen Nedyalkov
Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia
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Petroslav Petrov
Elatsite-MED AD, 2180 Etropole, Bulgaria

Integrated petrographic, geochemical and geochronological insights into the polyphase evolution of the Paleozoic metamorphic basement in the Elatsite porphyry-copper deposit, Bulgaria

Zlatozar Boev
National Museum of Natural History – Bulgarian Academy of Sciences 1 Tsar Osvoboditel Blvd. 1000 Sofia, Bulgaria

Connecting Europe and Asia: The Neogene birds of Bulgaria and their paleoenvironmental and paleornithogeographical significance

Dian Vangelov
Sofia University “St. Kliment Ohridski”, Department of Geology, Paleontology and Fossil fuels, Blvd. Tsar Osvoboditel 15, Sofia, Bulgaria
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Ianko Gerdjikov
Sofia University “St. Kliment Ohridski”, Department of Geology, Paleontology and Fossil fuels, Blvd. Tsar Osvoboditel 15, Sofia, Bulgaria
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Zornitsa Dotseva
Sofia University “St. Kliment Ohridski”, Department of Geology, Paleontology and Fossil fuels, Blvd. Tsar Osvoboditel 15, Sofia, Bulgaria
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Docho Dochev
Sofia University “St. Kliment Ohridski”, Department of Geology, Paleontology and Fossil fuels, Blvd. Tsar Osvoboditel 15, Sofia, Bulgaria
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Lubomir Metodiev
Geological Institute, Bulgarian Academy of Sciences, Acad. Georgi Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Abundant soft-sediment deformation structures in the Upper Cretaceous sequence of the Chelopech sub-basin, Central Bulgaria

Romeo Eftimi
Rr. Rreshit Çollaku, Pll. EUROCOL, Sh. 2, Ap. 43, Tirana, Albania

Hydrogeological characteristics of the Trebeshinë-Dhëmbel-Nëmërçkë (TDN) karst massif and groundwater drainage through the Këlcyra Gorge, Albania

DETAILS

VOLUME 55 (1)/April 2026

Nikolay Bonev
Department of Geology, Palaeontology and Fossil Fuels, Sofia University “St. Kliment Ohridski”, 1504 Sofia; Bulgarian Academy of Sciences, 1040 Sofia, Bulgaria

A review of magmatic crystallization ages and cooling ages of the Evros ophiolite, eastern Circum-Rhodope Belt, NE Greece

Antoaneta Frantzova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Plamen Ivanov
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Nikolai Dobrev
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Boyko Berov
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Miroslav Krastanov

Comparative analysis of risk assessment methodologies: example of some various specific natural disasters along the southern Bulgarian Black Sea coast

William A. P. Wimbledon
School of Earth Sciences, University of Bristol, Wills Memorial Building, Queens Road, Bristol BS8 1RJ, United Kingdom
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Daniela Reháková
Department of Geology and Paleontology, Faculty of Natural Sciences, Comenius University, Ilkovičova 6, 84215 Bratislava, Slovakia
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Silviya Petrova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Camille Frau
Groupement d’Intérêt Paléontologique, Science et Exposition, 60 bd Georges Richard, 83000 Toulon, France
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Diego A. Kietzmann
Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales, Departamento de Ciencias Geológicas, Ciudad Universitaria, Pabellón II, Intendente Güiraldes 2160, C1428EHA Ciudad Autónoma de Buenos Aires, Argentina
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Rafael López-Martínez
Instituto de Geología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Delegación Coyoacán, C.P. 04510, México D.F., Mexico

The calpionellid crisis - the defining marker for the Jurassic/Cretaceous boundary in all continents

Mariana Yossifova
Geological Institute, Bulgarian Academy of Sciences, “Acad. Georgi Bonchev” Str., Bl. 24, 1113 Sofia, Bulgaria
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Greta Eskenazi
Faculty of Geology and Geography, Sofia University “St. Kl. Ohridski”, Tzar Osvoboditel Str. 15, 1504 Sofia, Bulgaria

On the organic affinity of germanium in peat and coals: аn experimental approach

Slavcho Mankov
Geomac Ltd, 1712 Mladost 3, Bl. 325 А, Entr. 8, Apt 11B, Sofia, Bulgaria

Alabandite (MnS) from Bulgarian deposits

Todor Yordanov
National Centre for Radiobiology and Radiation Protection, Georgi Sofiiski Str. 3, 1606 Sofia, Bulgaria
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Aglaida Toteva
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Daniela Draganova
National Centre for Radiobiology and Radiation Protection, Georgi Sofiiski Str. 3, 1606 Sofia, Bulgaria
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Jana Jounova
National Centre for Radiobiology and Radiation Protection, Georgi Sofiiski Str. 3, 1606 Sofia, Bulgaria
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Kremena Ivanova
National Centre for Radiobiology and Radiation Protection, Georgi Sofiiski Str. 3, 1606 Sofia, Bulgaria

A geology-based predictive model for outdoor background gamma radiation in Bulgaria: framework and preliminary spatial assessment

DETAILS

VOLUME 54 (3)/December 2025

Ivan Zagorchev
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Editorial: Fifty years since the resurrection of the journal Geologica Balcanica

Konstantinos Gudulas
Hellenic Survey of Geology and Mineral Exploration (HSGME), West Macedonia Regional Division, 50150, Leykovrysi, Kozani, Greece; Department of Mineral Resources Engineering, Faculty of Engineering, University of Western Macedonia, Kozani, Greece

Tectonic controls and groundwater flow reversal in a post-mining basin: hydrogeological insights from the Zazari–Cheimaditida system, Northern Greece

Stanislav Vassilev
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, Sofia 1113, Bulgaria
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Christina Vassileva
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, Sofia 1113, Bulgaria
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Gergana Velyanova
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, Sofia 1113, Bulgaria; National Centre of Excellence Mechatronics and Clean Technologies, 8 Boulevard Kliment Ohridski, Sofia 1756, Bulgaria
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Mariya Georgieva
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, Sofia 1113, Bulgaria

Preliminary evaluation on the occurrence of critical elements in Bulgarian coal fly ashes and their potential industrial significance

Atanas Hikov
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Catherine Lerouge
BRGM, BP 6009, 45060 Orléans cédex 2, France
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Elitsa Stefanova
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Geochemistry of alunite from the Pesovets epithermal system, Central Srednogorie Zone, Bulgaria

DETAILS

VOLUME 54 (2)/August 2025

Rositsa Nikolova
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Str.bl.107, 1113 Sofia
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Nadia Petrova
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Str.bl.107, 1113 Sofia
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Vladislav Kostov-Kytin
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Str.bl.107, 1113 Sofia
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Rositsa Titorenkova
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Str.bl.107, 1113 Sofia
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Petko Petrov
Earth and Man National Museum, Cherni Vrah Blvd., 4, 1421 Sofia

Crystal chemistry of epsomite from three Bulgarian localities

Lidiya Kirilova
1Regional Museum of History Kardzhali, 4 Republikanska Str., 6600 Kardzhali, Bulgaria
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Ivan Ivanov
GORUBSO Kardzhali AD, 83 Republikanska Str., 6600 Kardzhali, Bulgaria

Fossil gastropods Campanile meneguzzoi Fuchs, 1870 from the Oligocene of the Eastern Rhodopes (Bulgaria)

Boriana Tchakalova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Metodi Karadjov
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Doncho Karastanev
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Nikolaya Velitchkova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Determination of distribution coefficient of Pliocene clay (Brusartsi Formation) in the Kozloduy area, Bulgaria

Aleksey Benderev
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Yotzo Yanev
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Mila Trayanova-Koleva
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Dimitar Topaligov
Water Supply and Sewerage Ltd., 4006 Plovdiv, Bulgaria
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Stefan Tsakovski
Sofia University “St. Kliment Ohridski”, Faculty of Chemistry and Pharmacy, 1164, Sofia, Bulgaria
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Veronika Mihaylova
Sofia University “St. Kliment Ohridski”, Faculty of Chemistry and Pharmacy, 1164, Sofia, Bulgaria

Genesis of boron in groundwater in a water supply borehole in the village of Dobri Dol, Plovdiv region, Bulgaria

Tanya Vasileva
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Assessing the quality of groundwater in Bulgaria for irrigation purposes - a spatial approach

Petko Petrov
Earth and Man National Museum, 4 Cherni vrah Blvd., Sofia, Bulgaria
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Stefka Pristavova
University of Mining and Geology St. Ivan Rilski, 1 Prof. Boyan Kamenov str., Studentski Grad, 1700 Sofia, Bulgaria
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Kamelia Marinova
University of Mining and Geology St. Ivan Rilski, 1 Prof. Boyan Kamenov str., Studentski Grad, 1700 Sofia, Bulgaria
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Beyhan Sabri
University of Mining and Geology St. Ivan Rilski, 1 Prof. Boyan Kamenov str., Studentski Grad, 1700 Sofia, Bulgaria

Corundum mineralization in the marbles from the vicinity of Mishevsko village, the Eastern Rhodopes, Bulgaria - preliminary data

Stanislav Vassilev
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, Sofia 1113, Bulgaria
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Christina Vassileva
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, Sofia 1113, Bulgaria
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Gergana Velyanova
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, Sofia 1113, Bulgaria
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Mariya Georgieva
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, Sofia 1113, Bulgaria
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Vilma Petkova
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, Sofia 1113, Bulgaria

Occurrence of nutrient and contaminant elements in biomass ashes and their significance for potential soil fertilization

Elvin Karimov
Azerbaijan State Oil and Industry University, Department of Oil and Gaz Geology, Az 1010, Baku, Azerbaijan
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Süleyman Dalğıç
İstanbul University-Cerrahpaşa, Department of Geological Engineering, Faculty of Engineering, 344500 Buyukcekmece/Istanbul, Turkiye
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Özkan Coruk
Kocaeli University, Engineering Faculty, Geological Engineering Department, Umuttepe Campus, 41001 İzmit/Kocaeli, Türkiye
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Ömer Ündül
Istanbul Technical University, Mining Faculty, Geological Engineering Department, 34469 Istanbul, Turkiye
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İbrahim Kuşku
İstanbul University-Cerrahpaşa, Department of Geological Engineering, Faculty of Engineering, 344500 Buyukcekmece/Istanbul, Turkiye

Stability assessment of the Pekmez landslide area: a comparison of the 2D Limit Equilibrium Method (2D LEM), 2D Finite Element Method (2D FEM), and 3D Finite Element Method (3D FEM)

DETAILS

VOLUME 54 (1)/April 2025

Boyko Berov
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Georgi Gadzhev
National Institute of Geophysics, Geodesy and Geography, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Plamen Ivanov
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Nikolai Dobrev
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Vladimir Ivanov
National Institute of Geophysics, Geodesy and Geography, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Nina Nikolova
Sofia University “St. Kliment Ohridski”, Faculty of Geology and Geography, 1504 Sofia, Bulgaria
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Aglaida Toteva
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Miroslav Krastanov
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Rosen Nankin
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria
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Antoaneta Frantzova
Geological Institute, Bulgarian Academy of Sciences, 1113 Sofia, Bulgaria

Assessment of landslide susceptibility in Bulgaria, in the context of climate change, using the Mora and Vahrson method

Stanislav Vassilev
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, Sofia 1113, Bulgaria
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Christina Vassileva
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, Sofia 1113, Bulgaria
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Mariya Georgieva
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, Sofia 1113, Bulgaria
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Gergana Velyanova
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 107, Sofia 1113, Bulgaria
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Lora Bidzhova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 24, Sofia 1113, Bulgaria
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Svetoslav Georgiev
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Block 24, Sofia 1113, Bulgaria

Content, association and modes of occurrence of mercury in biomass ashes and its behaviour during biomass combustion

Alexandre Kounov
Department of Environmental Sciences, Basel University, 4056 Basel, Switzerland
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Jean-Pierre Burg
Geological Institute, ETH-Zentrum, CH-8092 Zürich, Switzerland
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Daniel Bernoulli
Department of Environmental Sciences, Basel University, 4056 Basel, Switzerland; Geological Institute, ETH-Zentrum, CH-8092 Zürich, Switzerland
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Diane Seward
School of Geography, Environment and Earth Sciences, Victoria University, Wellington, New Zealand
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Milorad Antić
Zlatna Reka Resources, 11167 Belgrade, Serbia

Tectonic evolution of the Kraishte area (southwestern Bulgaria and southeastern Serbia) - an overview

DETAILS

VOLUME 53 (3)/December 2024

Elitsa Zareva
University of Mining and Geology, Studentski Grad, Prof. Boyan Kamenov Str., 1700 Sofia, Bulgaria
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Valeri Sachanski
University of Mining and Geology, Studentski Grad, Prof. Boyan Kamenov Str., 1700 Sofia, Bulgaria; Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Lubomir Metodiev
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Boris Valchev
University of Mining and Geology, Studentski Grad, Prof. Boyan Kamenov Str., 1700 Sofia, Bulgaria
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Dimitar Sachkov
University of Mining and Geology, Studentski Grad, Prof. Boyan Kamenov Str., 1700 Sofia, Bulgaria
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Miroslav Slavchev
University of Mining and Geology, Studentski Grad, Prof. Boyan Kamenov Str., 1700 Sofia, Bulgaria
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Daniel Yanev
University of Mining and Geology, Studentski Grad, Prof. Boyan Kamenov Str., 1700 Sofia, Bulgaria

Iskar Gorge and Ledenika cave - a brief overview

Stefka Pristavova
University of Mining and Geology, Studentski Grad, Prof, Boyan Kamenov Str., 1700 Sofia, Bulgaria
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Kamelia Marinova
University of Mining and Geology, Studentski Grad, Prof, Boyan Kamenov Str., 1700 Sofia, Bulgaria

Rocks and buildings in the Sofia City center - a geological and historical city tour

Valeri Sachanski
University of Mining and Geology, Studentski Grad, Prof. Boyan Kamenov Str., 1700 Sofia, Bulgaria; Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria
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Elitsa Zareva
University of Mining and Geology, Studentski Grad, Prof. Boyan Kamenov Str., 1700 Sofia, Bulgaria

The Silurian and the Devonian in the Svoge Unit, Western Bulgaria - a brief overview

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GEOLOGICAL INSTITUTE “Strashimir Dimitrov”

Acad. G. Bonchev Str., Bl. 24
1113 Sofia
Bulgaria
Phone: +359 (02) 979 3472 | +359 (02) 979 2278
Fax: +359 (02) 8724 638
E-mail: [email protected]

 

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GEOLOGICAL INSTITUTE “STRASHIMIR DIMITROV”

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