OUR JOURNAL

CURRENT ISSUE: VOLUME 50 (1)/April 2021

DETAILS

Lidiya Kirilova
Regional 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 lachesis Bayan, 1870 from the upper Eocene of the Eastern Rhodopes (Bulgaria)

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

XRD graphitization degrees: a review of the published data and new calculations, correlations, and applications

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

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

Liquefaction potential assessment of saturated loess

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

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

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Nikolai Zotov
University of Stuttgart, 70569 Stuttgart, Germany

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Elena Dubinina
Institute of Geology of Ore Deposits, Mineralogy, Petrography and Geochemistry (IGEM), Russian Academy of Sciences, 119017 Moscow, 35/1 Staromonetnyi pereulok, Russian Federation

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

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

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Iren Ilieva
Bulgarian Geological Society

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

Exotic rock block from the Koshava gypsum mine, Northwest Bulgaria: Petrography, geochemistry, mineralogy and melting phenomena

Editorial Board

In memoriam: A life dedicated to geology – a tribute to Academician Todor Nikolov, DSc (February 26, 1931 – March 26, 2021)

Silviya Petrova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., 1113 Sofia, Bulgaria

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Lubomir Metodiev
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., 1113 Sofia, Bulgaria

In memoriam: Deshka Georgieva Bakalova (August 17, 1932 – April 05, 2021)

DETAILS

VOLUME 45 (-)/December 2016

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

Lilia Delcheva Dodekova-Sapunova (April 26, 1934 – September 17, 2016)

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

Fifty years after the death of July Stephanov (1932-1966)

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

Stephen Erwin Moorbath (Magdeburg, 9 May 1929 – Oxford, 16 October 2016)

DETAILS

VOLUME 44 (1-3)/December 2015

Valeri Sachanski
University of Mining and Geology, Department of Geology and Geo-Information, Studentski Grad,“Prof. Boyan Kamenov” St., Sofia 1700; Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bl. 24, 1113 Sofia, Bulgaria

The Silurian in the West Balkan Mts. (Svoge Unit, Srednogorie Zone) – 110 years later

Iliana Boncheva
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bl. 24, 1113 Sofia, Bulgaria

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Valeri Sachanski
University of Mining and Geology, Department of Geology and Geo-Information, Sofia; Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bl. 24, 1113 Sofia, Bulgaria

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Ralph Thomas Becker
Westphälische Wilhelms-Universität, Institut für Geologie und Paläontologie, Corrensstr. 24, D-48149 Münster, Germany

Sedimentary and faunal evidence for the Late Devonian Kellwasser and Annulata events in the Balkan Terrane (Bulgaria)

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

Uppermost Albian–lower Cenomanian calcareous nannofossils from the Shishentsi-1 and Makresh-1 boreholes, Kula tectonic unit (NW Bulgaria)

Nadja Ognjanova-Rumenova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

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Krisztina Buczkó
Hungarian Natural History Museum, Department of Botany, 1476 Budapest, P.O. Box 222, Hungary

Taxonomical re-investigation of Sarmatian diatoms from NE Bulgaria, hosted in the Pantocsek Collection (Budapest)

Irena Peytcheva
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev, Bl.24, 1113 Sofia; Institute of Geochemistry and Petrology, ETH-Zurich

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Lubomira Macheva
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev, Bl.7, 1113 Sofia

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Albrecht von Quadt
Institute of Geochemistry and Petrology, ETH-Zurich

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Nikola Zidarov
Institute of Mineralogy and Crystallography, Bulgarian Academy of Sciences, Acad. G. Bonchev, Bl.7, 1113 Sofia

Gondwana-derived units in Ograzhden and Belasitsa Mountains, Serbo-Macedonian Massif (SW Bulgaria): combined geochemical, petrological and U-Pb zircon-xenotime age constraints

Marlena Yaneva
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev, Bl.24, 1113 Sofia, Bulgaria

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Iskra Lakova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev, Bl.24, 1113 Sofia, Bulgaria

80^th Anniversary of Prof. Slavcho Yanev, DSc

DETAILS

VOLUME 43 (1-3)/December 2014

Athanas Chatalov
Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia

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Yavor Stefanov
Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia

Diagenesis of Paleogene sandstones in the Padesh strike-slip basin, Southwestern Bulgaria

Lubomir Metodiev
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Bl. 24, 1113 Sofia; Bulgaria

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Natalia Tsvetkova
Historical Museum Etropole, 105, Ruski Boulevard, 2108 Etropole, p.o.b. 35, Bulgaria

Lower Bajocian ammonites from the stratotype section of the Etropole Formation kept in the Historical Museum in Etropole (Bulgaria)

Athanas Chatalov
Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia

Development of strain fringes in sedimentary rocks: Evidence for deformation of Upper Ordovician glacial diamictites in the western Srednogorie Zone

Athanas Chatalov
Sofia University “ St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia

Erratum to “Development of strain fringes in sedimentary rocks: Evidence for deformation of Upper Ordovician glacial diamictites in the western Srednogorie Zone” [Geologica Balcanica, 43 (1-3), 51-62]

Egor Platonov
FGU NPP "Geologorazvedka", Saint-Petersburg, Russia

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Iskra Lakova
Geological Institute, Bulgarian Academy of Sciences, Sofia, Bulgaria

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Silviya Petrova
Geological Institute, Bulgarian Academy of Sciences, Sofia, Bulgaria

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Vladimir Arkadiev
Saint-Petersburg State University, Saint Petersburg, Russia

Tithonian and Lower Berriasian calpionellid against ammonite biostratigraphy of the Dvuyakornaya Formation in eastern Crimea

Antoneta Seghedi
National Institute of Marine Geology and Geoecology, 23-25 Dimitrie Onciul St., sector 2, Bucharest, Romania

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Gheorghe Oaie
National Institute of Marine Geology and Geoecology, 23-25 Dimitrie Onciul St., sector 2, Bucharest, Romania

Volcaniclastic turbidites of the Coşuştea Nappe: a record of Late Cretaceous arc volcanism in the South Carpathians (Romania)

Argyros Papadopoulos
Department of Mineralogy, Petrology and Economic Geology, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece

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Antonios Koroneos
Department of Mineralogy, Petrology and Economic Geology, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece

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Georgios Christofides
Department of Mineralogy, Petrology and Economic Geology, School of Geology, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece

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Stylianos Stoulos
Laboratory of Nuclear Physics, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece

Natural radioactivity distribution and gamma radiation exposure of beach sands close to Maronia and Samothraki plutons, NE Greece

DETAILS

VOLUME 42 (1-3)/December 2013

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

Geochemistry of hydrothermally altered rocks from the Asarel porphyry copper deposit, Central Srednogorie

Dian Vangelov
Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd, 1504 Sofia, Bulgaria

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Yanko Gerdjikov
Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd, 1504 Sofia, Bulgaria

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Alexandre Kounov
Geological-Paleontological Institute, Geoscience Department, Basel University

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

The Balkan Fold-Thrust Belt: an overview of the main features

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

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

Trace elements in some biomass collected from areas associated with the lignite mining and power producing enterprise Maritsa East, Bulgaria

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

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Georgios Lazaridis
School of Geology, Aristotle University, 54124 Thessaloniki, Greece

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Evangelia Tsoukala
School of Geology, Aristotle University, 54124 Thessaloniki, Greece; E-mail: lilits@geo.auth.gr

Otis hellenica sp. nov., a new Turolian bustard (Aves: Otididae) from Kryopigi (Chalkidiki, Greece)

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

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

Groundwater recharge and baseflow as products of climate: example of Southeast Bulgaria

Arjan Beqiraj
Albanian Geological Survey, Rruga e Kavajes, 153, Tirana, Albania

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Andreea Uta
Institute of Geosciences, Water, Energy and Environment, Polytechnic University of Tirana, Tirana, Albania

The XX^th Congress of the Carpathian-Balkan Geological Association

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

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Radoslav Varbanov
University of Architecture, Civil Engineering and Geodesy, Hristo Smirnenski Blvd. 1, 1046 Sofia, Bulgaria

Geological and engineering geological settings of the radioactive waste repository Novi Han, Lozen Mountain, Bulgaria

DETAILS

VOLUME 41 (1-3)/December 2012

Dimitar Kovachev
Asenovgrad Palaeontological Branch, National Natural History Museum, Asenovgrad

A porcupine skeleton of Hystrix (Hystrix) primigenia (Wagner) from the Upper Maeotian (Turolian) of Hadzhidimovo, SW Bulgaria

Meysam Shafiee Ardestani
Faculty of Science, Department of Geology, Ferdowsi University of Mashhad, Mashhad, Iran

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Mohammad Vahidinia
Faculty of Science, Department of Geology, Ferdowsi University of Mashhad, Mashhad, Iran

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Abbas Sadeghi
Department of Geology, Faculty of Science, University of Shahid Beheshti, Tehran, Iran

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José Antonio Arz
Departamento de Ciencias de la Tierra (Paleontología) e Instituto de Investigación en Ciencias Ambientales (IUCA), Universidad de Zaragoza, C/ Pedro Cerbuna 12, E-50009 Zaragoza, Spain

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Docho Dochev
Department of Geology, Paleontology and Fossil Fuels, Faculty of Geology and Geography, Sofia University “St. Kliment Ohridski”, Sofia, Bulgaria

Integrated biostratigraphy of the Upper Cretaceous Abderaz Formation of the East Kopet Dagh Basin (NE Iran)

Yanaki Tenchov
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bl. 24, 1113 Sofia, Bulgaria

Mariopteris, Dicksonites and Fortopteris from the Dobrudzha Coalfield, Bulgaria

Silviya Petrova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Bl. 24, 1113 Sofia, Bulgaria

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Dragoman Rabrenović
Department of Geology, Faculty of Mining and Geology, University of Belgrade, Kamenicka 6, P.O. Box 227, 11000 Belgrade, Serbia

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Iskra Lakova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Bl. 24, 1113 Sofia, Bulgaria

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Elena Koleva-Rekalova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Bl. 24, 1113 Sofia, Bulgaria

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Daria Ivanova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Bl. 24, 1113 Sofia, Bulgaria

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Lubomir Metodiev
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Bl. 24, 1113 Sofia, Bulgaria

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Nenad Malešević
Department of Geology, Faculty of Mining and Geology, University of Belgrade, Kamenicka 6, P.O. Box 227, 11000 Belgrade, Serbia

Biostratigraphy and microfacies of the pelagic carbonates across the Jurassic/Cretaceous boundary in eastern Serbia (Stara Planina–Poreč Zone)

Dimitar Kovachev
Asenovgrad Palaeontological Branch, National Natural History Museum, Asenovgrad, Bulgaria

A complete skeleton of Adcrocuta eximia (Roth and Wagner, 1854) from the Upper Maeotian (Turolian) of Hadzhidimovo, SW Bulgaria

Kyriaki Papadopoulou-Vrynioti
Faculty of Geology and Geoenvironment, Department of Geography-Climatology, University of Athens, Panepistimioupolis, 15784, Athens, Greece

Morphogenetic study of the Mavri Limni Valley – “Polylimnio” in Messinia (Greece)

Jean Gaudant
USM 203 du Muséum national d’Histoire naturelle et UMR 7207 du CNRS, 17 rue du Docteur Magnan, 75013 Paris, France

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Milorad Vatsev
Department of Geology and Paleontology, University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia, Bulgaria

Palaeobatrachids (Amphibia, Anura) in the Oligocene sediments of the “Pirin” Mine (Brezhani Graben, southwestern Bulgaria)

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CURRENT ISSUE: VOLUME 50 (1)/April 2021

Lidiya KirilovaRegional Museum of History Kardzhali, 4 Republikanska Str., 6600 Kardzhali, Bulgaria | Ivan IvanovGORUBSO Kardzhali AD, 83 Republikanska Str., 6600 Kardzhali, Bulgaria

Alexander VlahovGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Doncho KarastanevGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria | Boriana TchakalovaGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Silviya PetrovaGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., 1113 Sofia, Bulgaria | Lubomir MetodievGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., 1113 Sofia, Bulgaria

Lubomir MetodievGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Lubomir MetodievGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

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

Valeri SachanskiUniversity of Mining and Geology, Department of Geology and Geo-Information, Studentski Grad,“Prof. Boyan Kamenov” St., Sofia 1700; Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bl. 24, 1113 Sofia, Bulgaria

Georgi GranchovskiGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Nadja Ognjanova-RumenovaGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria | Krisztina BuczkóHungarian Natural History Museum, Department of Botany, 1476 Budapest, P.O. Box 222, Hungary

Marlena YanevaGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev, Bl.24, 1113 Sofia, Bulgaria | Iskra LakovaGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev, Bl.24, 1113 Sofia, Bulgaria

Athanas ChatalovSofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia | Yavor StefanovSofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia

Lubomir MetodievGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Bl. 24, 1113 Sofia; Bulgaria | Natalia TsvetkovaHistorical Museum Etropole, 105, Ruski Boulevard, 2108 Etropole, p.o.b. 35, Bulgaria

Athanas ChatalovSofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia

Athanas ChatalovSofia University “ St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia

Antoneta SeghediNational Institute of Marine Geology and Geoecology, 23-25 Dimitrie Onciul St., sector 2, Bucharest, Romania | Gheorghe OaieNational Institute of Marine Geology and Geoecology, 23-25 Dimitrie Onciul St., sector 2, Bucharest, Romania

Atanas HikovGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Mariana YossifovaGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria | Dimitrina DimitrovaGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

Tatiana OrehovaGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113, Sofia, Bulgaria | Peter GerginovGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113, Sofia, Bulgaria

Arjan BeqirajAlbanian Geological Survey, Rruga e Kavajes, 153, Tirana, Albania | Andreea UtaInstitute of Geosciences, Water, Energy and Environment, Polytechnic University of Tirana, Tirana, Albania

Dimitar AntonovGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria | Radoslav VarbanovUniversity of Architecture, Civil Engineering and Geodesy, Hristo Smirnenski Blvd. 1, 1046 Sofia, Bulgaria

Dimitar KovachevAsenovgrad Palaeontological Branch, National Natural History Museum, Asenovgrad

Yanaki TenchovGeological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bl. 24, 1113 Sofia, Bulgaria

Dimitar KovachevAsenovgrad Palaeontological Branch, National Natural History Museum, Asenovgrad, Bulgaria

Kyriaki Papadopoulou-VryniotiFaculty of Geology and Geoenvironment, Department of Geography-Climatology, University of Athens, Panepistimioupolis, 15784, Athens, Greece

Jean GaudantUSM 203 du Muséum national d’Histoire naturelle et UMR 7207 du CNRS, 17 rue du Docteur Magnan, 75013 Paris, France | Milorad VatsevDepartment of Geology and Paleontology, University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia, Bulgaria

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GEOLOGICAL INSTITUTE “STRASHIMIR DIMITROV”

Lidiya Kirilova
Regional 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

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

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

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

Silviya Petrova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., 1113 Sofia, Bulgaria

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Lubomir Metodiev
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., 1113 Sofia, Bulgaria

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

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

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

Valeri Sachanski
University of Mining and Geology, Department of Geology and Geo-Information, Studentski Grad,“Prof. Boyan Kamenov” St., Sofia 1700; Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bl. 24, 1113 Sofia, Bulgaria

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

Nadja Ognjanova-Rumenova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Str., Bl. 24, 1113 Sofia, Bulgaria

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Krisztina Buczkó
Hungarian Natural History Museum, Department of Botany, 1476 Budapest, P.O. Box 222, Hungary

Marlena Yaneva
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev, Bl.24, 1113 Sofia, Bulgaria

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Iskra Lakova
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev, Bl.24, 1113 Sofia, Bulgaria

Athanas Chatalov
Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia

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Yavor Stefanov
Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia

Lubomir Metodiev
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev Street, Bl. 24, 1113 Sofia; Bulgaria

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Natalia Tsvetkova
Historical Museum Etropole, 105, Ruski Boulevard, 2108 Etropole, p.o.b. 35, Bulgaria

Athanas Chatalov
Sofia University “St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia

Athanas Chatalov
Sofia University “ St. Kliment Ohridski”, 15 Tsar Osvoboditel Blvd., 1504 Sofia

Antoneta Seghedi
National Institute of Marine Geology and Geoecology, 23-25 Dimitrie Onciul St., sector 2, Bucharest, Romania

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Gheorghe Oaie
National Institute of Marine Geology and Geoecology, 23-25 Dimitrie Onciul St., sector 2, Bucharest, Romania

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

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

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

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

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

Arjan Beqiraj
Albanian Geological Survey, Rruga e Kavajes, 153, Tirana, Albania

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Andreea Uta
Institute of Geosciences, Water, Energy and Environment, Polytechnic University of Tirana, Tirana, Albania

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

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Radoslav Varbanov
University of Architecture, Civil Engineering and Geodesy, Hristo Smirnenski Blvd. 1, 1046 Sofia, Bulgaria

Dimitar Kovachev
Asenovgrad Palaeontological Branch, National Natural History Museum, Asenovgrad

Yanaki Tenchov
Geological Institute, Bulgarian Academy of Sciences, Acad. G. Bonchev St., Bl. 24, 1113 Sofia, Bulgaria

Dimitar Kovachev
Asenovgrad Palaeontological Branch, National Natural History Museum, Asenovgrad, Bulgaria

Kyriaki Papadopoulou-Vrynioti
Faculty of Geology and Geoenvironment, Department of Geography-Climatology, University of Athens, Panepistimioupolis, 15784, Athens, Greece

Jean Gaudant
USM 203 du Muséum national d’Histoire naturelle et UMR 7207 du CNRS, 17 rue du Docteur Magnan, 75013 Paris, France

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Milorad Vatsev
Department of Geology and Paleontology, University of Mining and Geology “St. Ivan Rilski”, 1700 Sofia, Bulgaria