Migoń P, Pijet-Migoń E. Not simply volcanoes – The Geoheritage of the Cretaceous System in the Land of the Extinct Volcanoes Geopark, West Sudetes (SW Poland). geotour. 2021;17(1-2(60-61):3-22. doi:10.7494/geotour.2020.60-61.3