Among the 26 nature reserves established in the Transylvanian Basin, 13 have the status of geological reserves, and four of them are represented by mud volcanoes. Active volcanoes currently occur only in the area of B��ile Homorod. The other three reserves, Filia��, Monor and H����ag, represent mud volcanoes in their late stage of development. Assessment of these four reserves indicate that they show scientific importance, but only those from Homorod present interesting feature of active mud volcanoes as well as a high scientific value. Educational and touristic values of the three reserves with inactive mud volcanoes are rather limited, especially that they are remotely situated and they are more difficult to find, as there are no signs for location or explanatory panels. Also, the risk of degradation of the three inactive mud volcano fields are greater, due to cessation of their activity, possibly caused by exhaustion of gases generating them, or drying of the groundwater level crossed by the gases in their way to the surface., {"references":["Andrășanu, A. (2007). Călătorie în Ținutul Buzăului. Ghid neconvențional. University of Bucharest, Geomedia Center, 113 p., ISBN 978-973-1772-09-7","Baciu, C., Caracausi, A., Etiope, G., Italiano, F. (2007). Mud volcanoes and methane seeps in Romania: main features and gas flux. ANNALS OF GEOPHYSICS, 50(4): 510-515.","Bleahu, M., Brădescu, V., Marinescu, F. (1976). Rezervatii naturale geologice din Romania. Ed. Tehnică, 225 p.","Briceag , A., Balan, S., Ion, G., Baicu, G., Melinte-Dobrinescu, M. (2019). Mud volcanoes from Romania: geological and geochemical approaches. Proc. of 19th International Multidisciplinary Scientific GeoConference, SGEM 2019, Vol. 19 - Science and Technologies in Geology, Exploration and Mining, Issue 1.1: 369-375, https://doi.org/10.5593/sgem2019/1.1","Brilha, J. (2016). Inventory and Quantitative Assessment of Geosites and Geodiversity Sites: a Review. Geoheritage, 8: 119-134.","Brustur, T., Stănescu, I., Macaleţ, R., Melinte-Dobrinescu, M.C. (2015). The mud volcanoes from Berca: a significant geological patrimony site of the Buzău Land Geopark (Romania). Geo-Eco-Marina, 21: 1-22.","Chintăuan, I., Rusu, I. (1975). Vulcanii noroioşi de la Monor, Arhiva Someşană, Studii si cercetari III: 382-387, Muzeul Năsăudean, Năsăud.","Ciulavu, D., Dinu, C., Szakács, A., Dordea, D., 2000. Neogene kinematics of the Transylvanian Basin (Romania). American Association of Petroleum Geologists Bulletin 84(10): 1589-1615.","Ciupagea, D. (1991). L. Mrazec – Rolul său în descoperirea domurilor gazeifere din Transilvania. Editura Academiei Romaniei, Bucureşti, 170-174.","Ciupagea, D., Paucă, M., Ichim, T. (1970). Geologia depresiunii Transilvaniei. Editura Academiei Republici Socialiste Romania, Bucharest, 370 p.","Crofts, R., Gordon, J.E., Brilha, J., Gray, M., Gunn, J., Larwood, J., Santucci, V.L., Tormey, D., and Worboys, G.L. (2020). Guidelines for geoconservation in protected and conserved areas. Best Practice Protected Area Guidelines Series No. 31. Gland, Switzerland: IUCN. ISBN 978-2-8317-2079-1 (pdf), 144 p.","Dessila-Codarcea, M., Dimitrescu, R., Patrulius, D. (1967). Geological map of Romania sc. 1:200.000, Braşov sheet. Geological Institute of Romania, Bucharest.","Fassoulas, C., Mouriki, D., Dimitriou-Nikolakis, P., Iliopoulos, G. (2012). Quantitative Assessment of Geotopes as an Effective Tool for Geoheritage Management. Geoheritage, 4: 177-193, DOI 10.1007/s12371-011-0046-9","Filipescu, S. (2001). Cenozoic Lithostratigraphic units in Transylvania. In: Bucur, I.I., Filipescu, S., Săsăran, E. (eds.) Algae and carbonate platforms in western part of Romania. 4th Regional Meeting of IFAA Cluj-Napoca 2001 - Field Trip Guidebook, 1-13. Cluj University Press.","Gál, A. (2010). Vulcanii noroioşi din estul şi centrul Depresiunii Transilvaniei. Abstract of the PhD thesis, Babeş-Bolyai University, Cluj-Napoca, 22 p.","Gray, M. (2001). Geomorphological conservation and public policy in England: a geomorphological critique of English Nature's 'Natural Areas' approach. Earth Surface Processes and landforms 26: 1009-1023.","Gray, M., 2004. Geodiversity Valuing and Conserving Abiotic Nature, John Wiley and Sons Ltd., 418 p.","Hofmann, K. (1879). Bericht über die im östlichen Teile des Szilágyer Comitates wahrend der Sommercampagne 1878 vollführten geologischen Specialaufnahmen. Föld. Közl., IX(5-6): 231-283. Budapest.","Koch, A. (1894). Die Tertiärbildungen des Beckens der Siebenbürgische Landestheile. I. Paläogene Abtheilung. Mitth. Jahrb. d. kgl. ung. geol. Anst., X(6): 177-399, Budapest.","Koch, A. (1900). Die Tertiärbildungen des Beckens der siebenbürgischen Landestheile. II. Neogen. Mitth. a. d. Jahrb. d. kgl. ung. geol. Anst., Budapest, 370 p.","Krézsek, Cs., Bally, A.W. (2006). The Transylvanian Basin (Romania) and its relation to the Carpathian fold and thrust belt: Insights in gravitational salt tectonics. Marine and Petroleum Geology 23(4): 405-442","Krézsek, Cs., Filipescu, S., Silye, L., Matenco, L., Doust, H. (2010). Miocene facies associations and sedimentary evolution of the Southern Transylvanian Basin (Romania): implications for hydrocarbon exploration. Marine and Petroleum Geology 27: 191-214.","Marinescu, F., Ghenea, C., Papaianopol, I. (1981). Guide to excursion A6: Stratigraphy of the Neogene and the Pleistocene Boundary. Carpatho-Balkan Geological Association XII Congress, Bucharest–Romania, Inst. Geol. and Geophys., Guidebook Series, vol. 20, Bucharest, 112 p.","Marinescu, F., Ţicleanu, N., Papaianopol, I. (1994). Paysages Sarmatien en Romanie, In: The Miocene from the Transylvanian Basin-Romania, Institute of Geology and Geophysics, Cluj-Napoca, 155-161.","Mărunţeanu, M. (1997). Paleo-geographical maps of Romania. Manuscript.","Melinte-Dobrinescu, M.C., Brustur, T., Jipa, D., Macaleţ, R., Ion, G., Ion, I., Popa, A., Stănescu, I., Briceag , A. (2017). The Geological and Palaeontological Heritage of the Buzău Land Geopark (Carpathians, Romania). Geoheritage, 9(2): 225-236, https://doi.org/10.1007/s12371-016-0202-3","Mrazec, L. (1907). Despre cute cu sîmbure de străpungere. Buletinul Societătii de Ştiinţe, 16: 1-12.","Paucă, M. (1969). Problèmes tectoniques dans le bassin de Transylvanie. Geologische Rundschau, 58: 520-537.","Peahă, M. (1965). Vulcanii noroioşi din Romania. Stud. Cerc. Geol. Geof. geogr., ser. Geografie, 12(2): 193-206.","Pereira, P., Pereira, D.I. (2010). Methodological guidelines for geomorphosite assessment. Géomorphologie: relief, processus, environnement, 2: 215-222.","Pop, I.C. (2014). Emisii geogene de metan în Platforma Moldovenească şi Bazinul Transilvaniei. Abstract of the PHD thesis, Babeş-Bolyai University, Cluj-Napoca, 21 p.","Popescu, B.M. (1995). Romania's petroleum systems and their remaining potential. Petroleum Geoscience, 1: 337-350.","Prosser, C.D., Burek, C.V., Evans, D.H., Gordon, J.E., Kirkbride, V.B., Rennie, A.F., Walmsley, C.A. (2010). Conserving geodiversity sites in a changing climate: management challenges and responses. Geoheritage, 2: 123-136.","Reynard, E., Fontana, G., Kozlik, L., Scapozza, C. (2007). A method for assessing \"scientific\" and \"additional values\" of geomorphosites. Geographica Helvetica, 3: 148-158.","Sanders, C., Huismans, R., van Wees, J. D., Andriessen, P. (2002). The Neogene history of the Transylvanian basin in relation to its surrounding mountains. EGU Stephan Mueller Special Publication Series 3: 121-133.","Săndulescu, M. (1984). Geotectonica României. Editura Tehnică Bucureşti, 336 p","Săndulescu, M. (1988). Cenozoic Tectonic History of the Carpathians. Am. Assoc. Petrol. Geol. Mem. 45: 17-25.","Săndulescu, M., Kräutner, H., Borcoş, M., Năstăseanu, S., Patrulius, D., Ştefănescu, M., Ghenea, C., Lupu, M., Savu, H., Bercea, I., Marinescu, F. (1978). Harta geologica a României scara 1:1.000.000. Inst. Geol. Geofiz. Bucureşti.","Seghedi, A., Rădan, S., Brustur, T. (2020). Pliocene palaeontological heritage reserves in the Romanian Carpathian foreland–values and vulnerabilities. ProGEO News 1: 6-7.","Sharples, C. (2002). Concepts and principles of geoconservation. Published electronically on Tasmanian Parks & Wildlife Service website, https://www.researchgate.net/publication/266021113_ Concepts_and_principles_of_geoconservation, 79 p.","Spulber, L. (2010). Emisii geogene de metan in Transilvania si implicatiile lor asupra mediului inconjurator. Abstract of the PHD thesis, Babes-Bolyai University, Cluj-Napoca, 45 p.","Spulber, L., Etiope, G., Baciu, C., Malos, C., Vlad, S.N. (2010). Methane emission from natural gas seeps and mud volcanoes in Transylvania (Romania). Geofluids, 10: 463-475.","Szalai, T. (1950). Teke kornyekenek foldtani viszonyai. A. Magy. Alf. Fold. lnt. Evi Jelentése, Az 1941-1942 Evekrol II Kotet, Esz Fold. Tanul. Budapest.","Vancea, A. (1942). Geologische Untersuchungen im westsüdwestlichen Gebeite des siebenbürgischen Beckens. Bull. Soc. Roum. Géol., V: 177-218, București.","Vancea, A. (1960). Neogenul din Bazinul Transilvaniei. Editura Academiei RPR, Bucuresti, 262 p.","Vancea, G. (2007). Valorificarea turistică a vulcanilor noroioşi din zona Boz-Doştat. Pangeea, 7: 94-99. Editura Aeternitas, Alba Iulia. https://www.ceeol.com/search/article-detail?id=525136","Visarion, M., Polonic, P., Ali-Mehmed, E. (1976). Date noi asupra geometriei diapirelor de sare din Bazinul Transilvaniei. Stud. Tehn. Econ. D, Geof. 11: 29-62."]}