6th World Multidisciplinary Earth Sciences Symposium -WMESS 2020This volume of “ IOP Conference Series: Earth and Environmental Science (EES)” contains the papers presented in the “6th World Multidisciplinary Earth Sciences Symposium” in the city of romance Prague (Czech Republic) during 7-11 September 2020. The aim of the WMESS 2020 is to provide a forum for discussion of the latest findings and technologies in different fields of Earth Sciences, to give opportunities for future collaborations. It is a platform for sharing knowledge and experiences in the fields of Earth Sciences by providing a forum for early career researchers for presentation of their work and discussion of their ideas with experts in different fields of Earth Sciences.WMESS 2020 (www.mess-earth.org) is the 6th of the Annual series with its main mission to contribute in multidisciplinary studies related with Earth Sciences, and improvment of interactions between researchers. WMESS 2020 also provided a forum for this diverse range of studies which report the latest results and document emerging understanding of related systems and our place in it.We would like to show our deep gratitude to the honored Scientific Committee and Institutional Scientific Partners of WMESS 2020. The Scientific Committee and Institutional Scientific Partners of WMESS 2020 was completed by paying strict attention, and all members were selected from well-known, very much appreciated, productive and representatives of the different countries. We are deeply grateful to the members of the scientific committee and institutional scientific partners.All the missions of World Multidisciplinary Earth Sciences Symposium - WMESS 2020 were completed, and 109 peer reviewed articles were published. We would like to thank all reviewers for their great effort to achieve the high quality of published articles.We thank to the sponsors of WMESS 2020 (as main sponsors LAMA Energy Group, LAMA Gas and Oil, and to be co-sponsor Prague City Tourism) for their very much appreciated supports during the organization of “World Multidisciplinary Earth Science Symposium - WMESS 2020”. Of course, we would like to express my sincere gratitude to all participants from different countries all over the world for their interests and contributions in WMESS 2020. Another thank goes to the team of WMESS 2020 for their very much appreciated high workload during year.Işık YILMAZMarian MARSCHALKOMarian DRUSAEditors of WMESS 2020