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  1. Preface: 9th World Multidisciplinary Congress on Earth and Environmental Sciences (WMCEES 2025)

    Article • Inżynieria Mineralna, November 2025, Polish Mineral Engineering Society

    Professor Marek Widera

  2. Sedimentary record of the late Neogene avulsion processat the Tomisławice lignite opencast mine in central Poland – a new hypothesis

    Article • Acta Geologica Polonica, September 2025, Polish Academy of Sciences Chancellery

    Professor Marek Widera

  3. Poznań Clays versus Poznań Formation in the upper Neogene of the Polish Lowlands: controversy about meaning, origin and age

    Article • Geological Quarterly, July 2025, Polish Geological Institute

    Professor Marek Widera

  4. 80 lat Kopalni Węgla Brunatnego Konin. Część III – słoń leśny Palaeoloxodon antiquus z odkrywki Jóźwin

    Article • Przegląd Geologiczny, June 2025, Polish Geological Institute

    Professor Marek Widera

  5. Geological peculiarities from the Konin Lignite Mine, central Poland: An overview

    Article • Geologos, May 2025, Adam Mickiewicz University Poznan

    Professor Marek Widera

  6. The past, present and future of Konin Lignite Mine in central Poland

    Article • Geologos, May 2025, Adam Mickiewicz University Poznan

    Professor Marek Widera

  7. Microsclerotia of dark septate endophytic fungi from Paleogene and Neogene of Poland: fossil record and palaeoenvironmental significance of root fungal endophytes

    Article • Fungal Biology, May 2025, Elsevier

    Professor Marek Widera

  8. 80 lat Kopalni Węgla Brunatnego Konin. Część II – postęp badań geologicznych

    Article • Przegląd Geologiczny, March 2025, Polish Geological Institute

    Professor Marek Widera

  9. Pollen and non-pollen palynomorphs as tools for interpreting palaeoenvironmental changes in the Miocene lignite in the Chłapowo Cliff (northern Poland)

    Article • Annales Societatis Geologorum Poloniae, January 2025, Polskie Towarzystwo Geologiczne - Polish Geological Society

    Professor Marek Widera

  10. Disappearing lignite seam in the Tomisławice opencast (Konin Basin, central Poland) – the case study based on field and borehole data

    Article • Acta Montanistica Slovaca, December 2024, Technical University of Kosice - Faculty of Mining, Ecology, Process Control and Geotechnology

    Professor Marek Widera

  11. 80 lat Kopalni Węgla Brunatnego Konin Część I – historia rozpoznania złóż i ich eksploatacja

    Article • Przegląd Geologiczny, October 2024, Polish Geological Institute

    Professor Marek Widera

  12. Professor Tomasz "Zielu" Zieliński - an outstanding Polish sedimentologist: biography, scientific achievements, hobbies and publications

    Article • Geologos, August 2024, Adam Mickiewicz University Poznan

    Professor Marek Widera

  13. Polish energy sector’s dependence on lignite mining: The process of transition

    Article • Journal of Sustainable Mining, August 2024, Głowny Instytut Gornictwa (Central Mining Institute)

    Professor Marek Widera

  14. Polskie zasoby węgla brunatnego, górnictwo i energetyka – co dalej?

    Article • Gospodarka Surowcami Mineralnymi - Mineral Resources Management, June 2024, Polish Academy of Sciences Chancellery

    Professor Marek Widera

  15. Porównanie geologii prezentowanej na przekroju poprzecznym i obserwowanej w terenie - lekcja z odkrywki węgla brunatnego Tomisławice, Zagłębie Konińskie w Polsce Centralnej

    Article • Inżynieria Mineralna, June 2024, Polish Mineral Engineering Society

    Professor Marek Widera

  16. Główne minerały barwiące w iłach poznańskich: Studia przypadków z górnego neogenu na Niżu Polskim

    Article • Inżynieria Mineralna, June 2024, Polish Mineral Engineering Society

    Professor Marek Widera

  17. „Rój” mioceńskich stożków krewasowych w Konińskim Zagłębiu Węgla Brunatnego, Polska środkowa – stan wiedzy

    Article • Przegląd Geologiczny, May 2024, Polish Geological Institute

    Professor Marek Widera

  18. The geology of the deepest Cenozoic lignite-rich grabens in Poland with particular reference to their lithostratigraphy: a comparative study

    Article • Geology Geophysics and Environment, April 2024, AGHU University of Science and Technology Press

    Professor Marek Widera

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    Article • Acta Geologica Polonica, March 2024, Polish Academy of Sciences Chancellery

    Professor Marek Widera

  20. Cancellidium intergraniferum (R. Potonié & S.C.D. Sah) G. Worobiec & E. Worobiec, comb. nov. from the Miocene of Poland, with remarks on the fossil history and palaeoecological potential of Cancellidium

    Article • Palynology, February 2024, Taylor & Francis

    Professor Marek Widera

  21. Cenozoic tectonic evolution of the main lignite-rich grabens in Poland. Part 1. Tectonic stages

    Article • Acta Geologica Polonica, February 2024, Polish Academy of Sciences Chancellery

    Professor Marek Widera

  22. Four in one: a new crevasse-splay complex in the middle Miocene of central Poland

    Article • Annales Societatis Geologorum Poloniae, January 2024, Polskie Towarzystwo Geologiczne - Polish Geological Society

    Professor Marek Widera

  23. O ujednoliceniu terminologii osadów drobnoziarnistych i zlodowaceń – zainicjowanie dyskusji

    Article • Przegląd Geologiczny, December 2023, Polish Geological Institute

    Professor Marek Widera

  24. Colours of the upper Neogene “Poznań Clays” in the light of sedimentological, mineralogical and nuclear methods

    Article • Geological Quarterly, December 2023, Polish Geological Institute

    Professor Marek Widera

  25. A comparative study of the oxide and elemental composition of ash from lignite burned at various temperatures – Konin Lignite Mine, Central Poland

    Article • Gospodarka Surowcami Mineralnymi - Mineral Resources Management, July 2023, Polish Academy of Sciences Chancellery

    Professor Marek Widera

  26. Paleogene–Neogene tectonic evolution of the lignite-rich Szamotuły Graben

    Article • Acta Geologica Polonica, July 2023, Polish Academy of Sciences Chancellery

    Professor Marek Widera

  27. Distinct types of crevasse splays formed in the area of Middle Miocene mires, central Poland: Insights from geological mapping and facies analysis

    Article • Sedimentary Geology, January 2023, Elsevier

    Professor Marek Widera

  28. Reconstruction of the sedimentary environment of phytogenic deposits in the Tomisławice opencast mine (Konin Region, central Poland)

    Article • Geological Quarterly, December 2022, Polish Geological Institute

    Professor Marek Widera

  29. Origin of clastic partings and their impact on ash yield in mined lignite: A case study from middle Miocene of central Poland

    Article • Journal of Cleaner Production, September 2022, Elsevier

    Professor Marek Widera

  30. Iron-bearing phases affecting the colour of upper Neogene clayey sediments from Dymaczewo Stare, west-central Poland

    Article • Geologos, August 2022, De Gruyter

    Professor Marek Widera

  31. Wpływ przerostów piaszczystych w węglu brunatnym na działalność górniczą – przykład ze złoża „Pątnów IV” (okolice Konina) w środkowej Polsce

    Article • Przegląd Geologiczny, June 2022, Polish Geological Institute

    Professor Marek Widera

  32. Geological and palaeogeographical peculiarities of the Adamów Graben area, central Poland

    Article • Geologos, April 2022, De Gruyter

    Professor Marek Widera

  33. Palaeoenvironment of the middle Miocene wetlands at Drzewce, Konin region, central Poland

    Article • Annales Societatis Geologorum Poloniae, January 2022, Polskie Towarzystwo Geologiczne - Polish Geological Society

    Professor Marek Widera

  34. Terrestrial-aquatic wood-inhabiting ascomycete Potamomyces from the Miocene of Poland

    Article • Acta Palaeontologica Polonica, January 2022, Polska Akademia Nauk Instytut Paleobiologii (Institute of Paleobiology, Polish Academy of Sciences)

    Professor Marek Widera

  35. Ancient and modern anastomosing rivers: insights from sedimentological and geomorphological case studies of the Triassic, Neogene and Holocene of Poland

    Article • Geological Quarterly, November 2021, Polish Geological Institute

    Professor Marek Widera

  36. Tectonic-climatic interactions during changes of depositional environments in the Carpathian foreland: An example from the Neogene of central Poland

    Article • Acta Geologica Polonica, November 2021, Polish Academy of Sciences Chancellery

    Professor Marek Widera

  37. Middle Miocene wetland fungi from the Adamów Lignite Mine, central Poland

    Article • Historical Biology, July 2021, Taylor & Francis

    Professor Marek Widera

  38. Palaeoenvironmental reconstruction of the Konin Basin (central Poland) during lignite accumulation linked to the mid-Miocene climate optimum

    Article • Palaeogeography Palaeoclimatology Palaeoecology, April 2021, Elsevier

    Professor Marek Widera

  39. Vegetation response to environmental changes based on palynological research on the Middle Miocene lignite at the Jóźwin IIB open-cast mine (Konin region, central Poland)

    Article • Annales Societatis Geologorum Poloniae, January 2021, Polskie Towarzystwo Geologiczne - Polish Geological Society

    Professor Marek Widera

  40. Tectonic and sedimentary deformational structures within the first Mid-Polish lignite seam – Konin Basin, central Poland

    Article • IOP Conference Series Earth and Environmental Science, December 2020, Institute of Physics Publishing

    Professor Marek Widera

  41. Slump folds within mid-Miocene crevasse-splay deposits: a unique example from the Tomisławice lignite opencast mine in central Poland

    Article • Geological Quarterly, September 2020, Polish Geological Institute

    Professor Marek Widera

  42. Is the Złoczew lignite deposit geologically suitable for the first underground gasification installation in Poland?

    Article • Geologos, August 2020, De Gruyter

    Professor Marek Widera

  43. Architektura i geneza iłów w górnym poziomie węgli brunatnych formacji poznańskiej (środkowy miocen) – odkrywka Tomisławice k. Konina w środkowej Polsce

    Article • Przegląd Geologiczny, June 2020, Polish Geological Institute

    Professor Marek Widera

  44. Anastomosing-to-meandering transitional river in sedimentary record: A case study from the Neogene of central Poland

    Article • Sedimentary Geology, May 2020, Elsevier

    Professor Marek Widera

  45. Petrological and geochemical characteristics of xylites and associated lipids from the First Lusatian lignite seam (Konin Basin, Poland): implications for floral sources, decomposition and environmental conditions

    Article • Organic Geochemistry, May 2020, Elsevier

    Professor Marek Widera

  46. New Insights Into the Genesis of the “Poznań Clays” – Upper Neogene of Poland

    Article • Civil And Environmental Engineering Reports, March 2020, De Gruyter

    Professor Marek Widera

  47. Composition of lipids from the First Lusatian lignite seam of the Konin Basin (Poland): Relationships with vegetation, climate and carbon cycling during the mid-Miocene Climatic Optimum

    Article • Organic Geochemistry, December 2019, Elsevier

    Professor Marek Widera

  48. Middle Miocene palynoflora from the Adamów lignite deposit, central Poland

    Article • Palynology, November 2019, Taylor & Francis

    Professor Marek Widera

  49. Various Genetic Types of End Moraines in the City of Poznań and Its Close Vicinity, Central-Western Poland

    Article • Civil And Environmental Engineering Reports, September 2019, De Gruyter

    Professor Marek Widera

  50. Seismically induced soft-sediment deformation in crevasse-splay microdelta deposits (Middle Miocene, central Poland) – reply

    Article • Geological Quarterly, June 2019, Polish Geological Institute

    Professor Marek Widera

  51. Sedimentary Facies, Processes and Paleochannel Pattern of an Anastomosing River System: An Example from the Upper Neogene of Central Poland

    Article • Journal of Sedimentary Research, June 2019, Society for Sedimentary Geology

    Professor Marek Widera

  52. The interpretative significance of ripple-derived sedimentary structures within an upper Neogene fluvial succession of central Poland

    Article • Geologos, April 2019, De Gruyter

    Professor Marek Widera

  53. Seismically-induced soft-sediment deformation in crevasse-splay microdelta deposits (Mid-Miocene, central Poland)

    Article • Geological Quarterly, March 2019, Polish Geological Institute

    Professor Marek Widera

  54. What can be learned about the deposition and compaction of peat from the Miocene lignite seam exposed in the Chłapowo Cliff on the Polish coast of the Baltic Sea?

    Article • Geology Geophysics & Environment, January 2019, AGHU University of Science and Technology Press

    Professor Marek Widera

  55. Glaciotectonically Deformed Lignite Deposits In The Area Between Łagówek And Sieniawa, Western Poland

    Article • Civil And Environmental Engineering Reports, March 2018, De Gruyter

    Professor Marek Widera

  56. Tectonic and Glaciotectonic Deformations in the Areas of Polish Lignite Deposits

    Article • Civil And Environmental Engineering Reports, March 2018, De Gruyter

    Professor Marek Widera

  57. Sedimentary breccia formed atop a Miocene crevasse-splay succession in central Poland

    Article • Sedimentary Geology, October 2017, Elsevier

    Professor Marek Widera

  58. A Miocene anastomosing river system in the area of Konin Lignite Mine, central Poland

    Article • Annales Societatis Geologorum Poloniae, January 2017, Polskie Towarzystwo Geologiczne - Polish Geological Society

    Professor Marek Widera

  59. Lignite mining and electricity generation in Poland: The current state and future prospects

    Article • Energy Policy, May 2016, Elsevier

    Professor Marek Widera

  60. Depositional environments of overbank sedimentation in the lignite-bearing Grey Clays Member: New evidence from Middle Miocene deposits of central Poland

    Article • Sedimentary Geology, April 2016, Elsevier

    Professor Marek Widera

  61. Genetic classification of Polish lignite deposits: A review

    Article • International Journal of Coal Geology, March 2016, Elsevier

    Professor Marek Widera

  62. An overview of lithotype associations of Miocene lignite seams exploited in Poland

    Article • Geologos, January 2016, De Gruyter

    Professor Marek Widera

  63. Characteristics and origin of deformation structures within lignite seams – a case study from Polish opencast mines

    Article • Geological Quarterly, December 2015, Polish Geological Institute

    Professor Marek Widera

  64. Compaction of lignite: a review of methods and results

    Article • Acta Geologica Polonica, January 2015, De Gruyter

    Professor Marek Widera

  65. Lignite cleat studies from the first Middle-Polish (first Lusatian) lignite seam in central Poland

    Article • International Journal of Coal Geology, September 2014, Elsevier

    Professor Marek Widera

  66. What are cleats? Preliminary studies from the Konin lignite mine, Miocene of central Poland

    Article • Geologos, January 2014, De Gruyter

    Professor Marek Widera

  67. Anthropogenic mineral deposits in Wielkopolska lignite mines – current state of research

    Article • Gospodarka Surowcami Mineralnymi - Mineral Resources Management, January 2014, De Gruyter

    Professor Marek Widera

  68. Changes of the lignite seam architecture — A case study from Polish lignite deposits

    Article • International Journal of Coal Geology, July 2013, Elsevier

    Professor Marek Widera

  69. Macroscopic lithotype characterisation of the 1st Middle-Polish (1st Lusatian) Lignite Seam in the Miocene of central Poland

    Article • Geologos, January 2012, De Gruyter

    Professor Marek Widera

  70. Stages of the Cenozoic tectonics in central Poland: examples from selected grabens [Phasen der känozoischen Tektonik im Polnischen Tiefl and: Ausgewählte Beispiele aus dem Braunkohle-Becken.]

    Article • Zeitschrift der Deutschen Gesellschaft für Geowissenschaften, June 2011, Schweizerbart

    Professor Marek Widera

  71. Biomarker and stable carbon isotope systematics of fossil wood from the second Lusatian lignite seam of the Lubstów deposit (Poland)

    Article • Organic Geochemistry, November 2007, Elsevier

    Professor Marek Widera, Reinhard Sachsenhofer

  72. From peat bog to lignite seam: a new method to calculate the consolidation coefficient of lignite seams, Wielkopolska region in central Poland

    Article • International Journal of Earth Sciences, November 2006, Springer Science + Business Media

    Professor Marek Widera